DE102006002061A1 - Data streams receiving method for communication connection, involves outputting usage portion in one of data streams under usage of identification character in coordinated manner to output of partial section - Google Patents

Abstract

The method involves receiving and delaying a data stream (E), and receiving another data stream (P) with a usage portion (W, Y) and an identification character (Q, U), which is derived from a partial section of one of the data streams. The identification character in another data stream is detected, and the partial section in the former data stream is detected based on the identification character. The usage portion in the latter data stream under usage of the character is outputted in a coordinated manner to an output of the partial section. Independent claims are also included for the following: (1) a transmission arrangement comprising a device for detecting an usage signal (2) a receiving arrangement for synchronization of usage signals (3) a system comprising a transmission arrangement and a receiving arrangement.

Description

The The invention relates to a method for receiving a first data stream and a second data stream. The invention also relates to a Method for transmitting and a method for transmitting a first and second data stream from a sender to a receiver. The invention further relates to a transmitting arrangement, a receiving arrangement and a system of a transmitting and a receiving arrangement.

modern Communication links, for example for the transmission of voice and audio signals use often Protocols in networks, which the respective transmitting or receiving station via different Connect network nodes together. Such a connection is also referred to as a circuit switched or "circuit switched" connection. A data or signal transmission over the network nodes, depending on the protocol and network used different data transmission types can be provided. In a circuit-switched connection is used for all signals and signal components in general, the transmission path previously determined and kept free. This leads to that with such Communication link a substantially constant delay time between transmitter and receiver occurs. The duration of the delay Among other things, the switching times of the different Components of the various nodes determines, over which the communication connection will be produced.

The transmission formats are often like that designed such that useful signals without time information contained therein over the Medium are transported. A typical example is one ordinary, e.g. analog, telephone connection between a transmitter and a Receiver, at the language or Audio signals are received by a microphone on the transmitter side and transmitted via the Communication link are sent to the recipient. As soon as on the receiver side available they are over a speaker without additional delay output. For digital communication links, the Audio signals frequently in sections of certain length divided, coded and then sent to the receiver. Also digital coded audio signals usually contain no additional time information. in the In general, it can be assumed that audio signals in an end-to-end communication link using circuit switched technology additional Have time information.

Besides is there a possibility, User data of various types or media, such as language and transfer image between sender and receiver in a synchronized manner. A such synchronized transmission a combination of two or more media signals or data streams also as English "Session". One typical example of this is the so-called videoconference, in addition to a pure audio signal or audio data stream also transmitted image or video signals become. For synchronization between audio and video signals it different ways. In a circuit-switched approach, audio and video signals are used into a circuit switched data stream, typically referred to as "multiplexing", so that and the same transmission path for both Currents or Signals is used and thus the synchronization by appropriate Arrangement in the data stream is practically given by all the signals after their decoding immediately be played in another e.g. packet-switched approach different media or each package of each medium basically transmitted over different transmission paths become. In this case for correct play as well as synchronization are with the transmission additional Information in the form of timestamps, e.g. in every media package, intended.

It However, the need may be exist additional second payload to an already existing communication link hinfügen to want, where the existing communication connection is continued. This is the case, for example, when talking to a voice or Audio signal transmission additionally also transmits video signals should be. The question of a joint issue is lost other then, if for the first connection the circuit-switched technique mentioned above is used.

A easy way consists in the second media signal, in the present video signal over a additional Communication link to transfer. In such a case, it is quite possible that the second communication link other areas of the communication network used. If receiver side both media signals or payload data is output, is the built Session is not synchronized and it generally comes to one Time offset between the different media signals or data streams.

One way to prevent mismatched output would be to terminate the first communication link and rebuild a completely new "session" including the additional second media signal. Synchronization can then take place by the simultaneous transmission of the two media signals or data streams over the same connection. Alternatively, for the connection also a another media signal, for example a video conference. In this solution, however, the already existing communication connection is terminated, an operation that is not desired by a user as a rule. In addition, even if one of the two data streams is changed, the existing connection must be terminated. A flexible addition of an additional media signal or data stream with, for example, different bit rate or content to an already existing communication connection is not possible in this embodiment.

task The invention is to provide methods which, in a transmission of first and second data streams ensure a concerted temporal output of the two data streams. Another object of the invention is to provide a transmitting or receiving arrangement provide a synchronous data transmission of multiple data streams in a simple Way allows.

These Tasks are with the independent ones claims 1, 19, 23, 37, 48, 59 solved. embodiments and further aspects of the invention are the subject of the dependent claims.

To the principle of the invention is provided in the second data stream additional identification features provided derived from the first data stream and so on a coordinated output of the first and second data stream allow. This allows an already existing communication connection with a transmission continue the first data stream.

Under The term data stream means any kind of signal that for transmission of information is suitable. The data stream can therefore be a useful signal include, but also represent the useful signal itself. Likewise it may be an analog or a digital signal or such include.

To the proposed principle becomes the first communication link for a transmission the first data stream, a second communication link for the transmission of the second data stream. In the second data stream are Identification features that contain an assignment of sections of the second data stream to corresponding sections of the first Enable data stream. Likewise be included in the second data stream identification features an assignment of sections of one in the second data stream contained useful signal to corresponding sections of the first Data stream or corresponding sections of a useful signal in the first data stream. On the receiver side, such a succession matched output of the first data stream and the second data stream respectively.

Conveniently, are the identifiers in the second data stream of the derived first data stream or payload data in the first data stream. It is even possible that the identification features essential parts of the first data stream or the payload of the first data stream.

For example the first data stream audio signals or audio data in at least contain two of temporally successive sections. The term audio signal or audio data is any form of audible signals understood, ie language, sounds, Sounds or music. Each of the subsections becomes an identification feature extracted, which is an identification of the respective subsection of the first data stream. This identification feature becomes a subsection of a second Data stream assigned so that a later time coordinated or also a synchronous output of the respective sections is possible. Under a synchronous output is a tuned play understood, as possible good synchronicity under other conditions. It is useful if the for the identification of the sections used features especially robust against artifacts or disturbances while the data transmission of the first data stream. disorders or signal changes can for example, by encoding and compressing signals due to irrelevance reduction and quantization or distortions or noise during the transmission or any other effects. In this way, the receiver side even after one or more of these disturbances during data transmission a synchronous output of the first and second data stream.

In According to one aspect of the invention, the method comprises the steps of Receiving and delaying of the first data stream, which is a multitude of successive ones Subsections has. Likewise, a second data stream is received. For this now at least a first identification feature determines which of at least a first subsection of derived successive sections of the first data stream is. additionally the method comprises the step of analyzing the first one delayed Data stream or the individual subsections in the first data stream. It is a first subsection of the first data stream in dependence the at least one first identification feature determined and subsequently this first subsection is combined with the second data stream output.

to delay of the first data stream, it is sufficient if this is cached. Also can for the Processing of the first data flow measures to be provided, which a Delay output of the sections of the first data stream, so that sufficient time for the further process steps remain. A time offset between corresponding sections of the first and second data streams can be corrected.

For one another coordinated output of the first and second data stream, it is therefore appropriate, in addition to the extraction of the first identification feature in the second Data stream a corresponding identification feature in the first data stream to investigate. These are the subsections of the first data stream analyzed and derived from each subsection of an identification feature. This should be of the same type as the first identifier so, after making a comparison, make a decision about it can be whether the first identification feature contained in the second data stream matches the derived identification features of the first data stream or at least sufficiently similar is.

at of the present invention such an extra second data stream to an already existing communication connection with a data transfer Add, without interrupting the already existing communication connection must become. It is only necessary to present the first data stream to cache the output to the steps of determining of identification features and the subsequent synchronization to enable.

In An embodiment of the invention is for the generation of the first Data stream provided a first useful signal, the several consecutive Includes subsections. The first useful signal can be any kind of signal be containing audio data. From the individual sections of the useful signal identification features are derived, which the Identify each subsection with a high probability. By doing so leaves based on the identification feature with high probability determine an assignment to the respective subsection. The derived ones Identification features can for one Generation of a second data stream can be used by Subsections in the second data stream are assigned to one another Coordinated edition with the corresponding sections of the first data stream are provided.

Conveniently, the derived identification features are particularly robust against Artifacts in signal processing, compression or interference during the Data transfer. For example, you can the identifiers from LTP (Long Term Prediction) coefficients a subsection are formed. Alternatively, it can be the identifier by analyzing frequency information a content of the respective subsection of the first data stream or the first useful signal. It is also possible diverse Sequence information, such as HASH sequences or checksums to determine from subsections. The latter is appropriate if the first useful signal coded according to a coding method information contains. But it is also possible that the identification features encoded portions of the first data stream or the first useful signal included.

In In another embodiment of the invention, the method comprises additionally the steps of providing a first and second wanted signal, each one of a plurality of temporally successive Have sections. Corresponding sections in each case are assigned to each other for a later one coordinated edition. From sections of the first useful signal identification features are determined and the corresponding Associated with subsections of the second useful signal. Then be first and second useful signals processed further and as the first and second Transfer data stream. After a reception, the two data streams are buffered. The become in the second data stream existing identification features extracted. At the same time, the subsections become the first data stream obtained the first useful signal and identification features determined. These are with the existing in the second data stream Identification features compared. In a match, the corresponding Subsections issued, leaving a coordinated output guaranteed is.

there is it additional possible, Discard unused sections after a certain period of time or spend. This can be useful, especially if while the data transmission of the first or second data stream parts have been lost or due to errors during the data transmission can not be reconstructed.

• – Analoge Audiosignale bzw. Audiodaten;
• – GSM kodierte Audiosignale;
• – G.711 kodierte Audiosignale;
• – PCM kodierte Audiosignale;
• – AMR oder AMR-WB kodierte Audiosignale;
• – nach einem der G.72x Verfahren des ITU-T Standards kodierte Audiosignale, z.B. G.723.1, G.727, G.729.

The first data stream may contain at least one of the following useful signals or be formed as such:

• - analog audio signals or audio data;
• - GSM encoded audio signals;
• G.711 encoded audio signals;
• - PCM encoded audio signals;
• AMR or AMR-WB encoded audio signals;
• - According to the G.72x method of the ITU-T standard coded audio signals, eg G.723.1, G.727, G.729.

Out Each of the mentioned audio signals can be identification features determine for sections, with high probability an identification of the respective Enable subsection. It may be appropriate, identification features to use that during a signal processing or coding of the audio signal or be generated anyway of the first useful signal. This reduces the complexity within a transmission arrangement. By using existing ones Coding or communication standards may be the existing technologies and transmission method continue to be used.

With the method according to the invention Is it possible, any additional Add data stream to the existing data stream without to interrupt this. For example, the additional Data stream video data, especially in MPG, MPG2 or H.26X format contain. Likewise, additional image data, in particular in JPG format or also data for a computer-aided Transfer slide show. One more way consists in the parallel transmission other voice or audio signals or audio data, for example for the transfer of a Stereo signal. Likewise, text as a useful signal in the second data stream be transferred in a coordinated manner to the first data stream. Basically everyone is Kind of information suitable for a synchronization at first Data stream or to the existing in the first data stream user data needed.

A transmission the first and the second data stream can be partially transmitted by transmission of Signals according to a mobile communication standard or example through an internet connection between at least two different nodes respectively. It is also possible a transmission at least partially by a wired communication link perform.

Accordingly, includes a transmission arrangement according to the proposed principle, a first Device for detecting a first useful signal and a second Device for detecting a second useful signal. Furthermore is provided an analysis device which is executed, from a first section the first useful signal at least one identification feature for an identification of the first subsection to determine. The analyzer is connected to a coding device, that of the analysis device provided identification feature a first section assigns the second useful signal. The transmission arrangement also includes a first transmission stage associated with the first device for transmission of the coupled first payload. A second transmission stage for a transmission the second useful signal is connected to the coding device.

With the transmission arrangement according to the invention can be a first and a second useful signal capture. While that first payload signal is transmitted by the first transmission stage, comprises the transmission arrangement various means for further processing of the second useful signal. It is provided, the second useful signal identification features assign, which allow synchronization with the first useful signal. Contains for this purpose the transmission arrangement according to the invention an analysis device for an analysis of subsections of the first useful signal.

The Analysis device can be executed to identify identification features from these signals, on the one hand robust against interference of any kind in the voice or audio signal and on the other hand allow identification of the respective subsection of the signal. In addition to the use of purely analog signals can be the identification features also from coded digital useful signals. Likewise, the Identifiers Parts of the audio signal or the coded one Contain audio data.

In An embodiment of the invention is therefore the first device for detecting the first useful signal for coding after a Coding type executed. For example, this is a μ-law Coding, a GSM coding, a PCM coding, an AMR or AMR-WB coding a G.711 coding or a G.72x coding, where x can take different values. The last mentioned codes denote various methods of the ITU-T standard for voice compression. The different coding methods are particularly suitable for coding of speech or audio signals.

For one another Coordinated output of the first and second useful signals may be expedient if the encoder in addition a synchronization device. This is suitable Identification feature of a subsection of the first useful signal to assign to a subsection of the second useful signal, wherein this assignment a predetermined time ratio of Part of the second useful signal to the subsection of the first useful signal corresponds. In addition, the encoder for the generation be executed by so-called time stamps. This can be done the identification features and the subsections in the second useful signal apply, whereby an assignment is determined.

In Another embodiment of the invention is the first transmission stage for a transfer to a first transmission channel and the second transmission stage for a transmission on a second transmission channel executed. these can each different transmission channels but also the same transmission channel represent. It is also possible that first and second transmission stage form a common transmission stage and transmit first and second payload data in a common transmission channel.

One Another aspect of the invention relates to a receiving arrangement for one another coordinated playback of useful signals of a first and second Data stream. This can be a first buffer for storing a first useful signal or a delay unit included. An analysis device in the second receiving arrangement is with the ers th buffer or the delay unit coupled and executed, at least one identification feature from the first useful signal for one Identification of at least a first subsection of the first Determine and provide useful signal.

The Receiving arrangement contains a synchronizer for a concerted output of the first and second useful signal based on a comparison of stored in the second payload identification features with the at least one provided by the analyzer Identification feature.

By the processing of the first data stream and the extraction of Identification features deleted the need to have an already existing communication connection and transfer of the abort the first useful signal. Rather, it is possible to have one new communication connection for a transmission to build a second data stream to receive this and from it determine a second useful signal and the identification features, the for a synchronization of the second useful signal with the first useful signal are provided. Thereby can already existing communication standards or technologies be used.

In an aspect of the invention the receiving arrangement is a comparison device for output a control signal in response to a comparison of the second Data stream stored identification features with those of the analyzer provided identification features is executed. This control signal serves to tune the output of the first and second useful signal.

The Comparator is in one aspect of the invention for analysis a similarity between the deposited identification features and the at least one provided identification feature executed. By analyzing a similarity will it be possible even with a slight disturbance of the first or second useful signal during a data transmission an identification and assignment for a synchronous output too enable.

In Another aspect of the invention is the comparison device executed with a generation of the first useful signal from the identification features. This is useful, for example, if the identification features in the second data stream encoded Represent the shape of the first useful signal. In this embodiment is it possible to have one Decision about it to make which first payload is to be output, the from the first data stream or from those in the second data stream generated identification features generated.

There in general, the transferred Signals to the receiving device according to a communication standard encoded in one aspect of the invention comprises the receiving arrangement a first coding device. The encoder is for generation the first payload signal from a first one of the receiving device received signal formed. Furthermore, a second decoding device be provided for generating the second useful signal from a second received signal is executed. It is possible that the receiving arrangement for a reception of the first and the second signal in a common transmission channel or formed in different transmission channels is.

at the system according to the invention it is a sending order that is used to deliver a first and a second signal is formed, wherein the second signal Identification features included from the first signal or from Information contained therein is derived. The receiving arrangement is for identifying identification features from the first signal accomplished and contains Means for a concerted, especially one synchronous output derived from the first and second signals Signals. The output depends on a comparison the identified identification features with the in the second signal contained identification feature. This can cause the output of a arbitrary content of a second signal timed to an output of the first signal. The second signal can For example, audio signals, video signals or computer-assisted slide shows include.

in the The invention will be described below with reference to various embodiments explained in detail with the aid of the drawing. Show it:

1 a first form of representation of a system with a transmitter and a receiver according to the inventive principle,

2 a second representation of a system for a synchronous transmission between a transmitter and a receiver according to the principle of the invention,

3 a third representation of a system for a synchronous transmission between a transmitter and a receiver according to the inventive principle,

4 a schematic representation with first and second useful signal,

5 a first embodiment of the method according to the invention,

6 a second embodiment of the method,

7 a third embodiment of the method.

in the As a rule, a system for a communication the following components. For one thing is one Transmitter provided to transmit the User data collected and processed according to a communication standard. The processed and possibly processed data will be passed on to a communication network. This usually contains several individual nodes, which pass on the useful signal. Depending on selected Communication connection, it may happen that the useful signal reprocessed or converted into another data format becomes. At the end of the system, the network is in turn with the receiving unit coupled, who transmitted the Data again converted into the useful signal.

One typical example of this is a connection of a mobile communication device in a landline and for example to an ISDN telephone line. Here are the useful signals to be transmitted in the form of voice or audio signals from the transmitter, the mobile Communication device in Signals are converted to a communication standard and transmitted to a base station. The base station forms part of the network and processes the received signals on. she extracts it, for example again the useful signal in the form of the speech signal. This will be after coded according to the PCM coding method and via a landline line hand over the recipient. It may well happen that depending on the distance between transmitter and receiving device provided within the network several different nodes are that during the data transmission Reprocess or otherwise process the signal.

For data transmission in the present case an end-to-end connection is used. Here, the communication connection between the communication device and the Telephone set up, and the line remains independent of a voice transmission consist. The connection will only become complete interrupted. This results in the transmission of the language to a essentially constant delay time, that the individual nodes of the communication link do not change. in the Generally, such a communication connection is also called circuit-switched or "circuit switched "connection. designated.

in the Contrary to this in a packet-oriented transmission the individual packages over different Routes transmitted to the recipient become. As a result, it can also have different maturities come. A typical example of such a packet-oriented communication connection is included Internet-based transmissions in front.

1 shows a system of a transmitting unit 1 , a receiving unit 3 and a network in between 2 for a communication between transmitting unit 1 and receiving unit 3 ,

The transmitting unit is designed in the present case as a mobile communication device. It contains a microphone 131 for recording an analog voice or audio signal, for example from a user. This is done by a coding device 13 converted into a mobile data compliant data stream B. The coding device contains this 13 For example, a signal processor that converts the analog audio signals into digital signals. These are filtered low-pass, and coded according to a method provided for the mobile radio standard. Subsequently, the thus encoded and processed analog audio signals as data stream B via an antenna 19 to a communication network 23 issued. The term data stream is to be understood in the following as a generic term for all types of signals for the transmission of information.

In the present case, the communication network includes 23 a base station and other landline connections with multiple landline nodes. Since a transmission according to a mobile standard between the landline nodes is usually not provided, the base station generates in the network 23 from the data stream B another signal. For example, this can now take place in the form of a PCM-coded variant of the analog audio signal A present in the data stream B.

Finally, a data stream C, which in the ideal case contains the same user data (ie the audio signal A) as the stream B to the base station 24 issued. This generates the signal D according to a predetermined mobile radio standard and sends it to the receiving unit 3 ,

From the receiving unit 3 the signal D is received and decoded. The decoding includes, for example, the conversion and extraction of the encoded audio data. These are used as data stream E in the audio decoder 31 fed, which converts them into the digital audio signal F. On the output side is the audio decoder with a loudspeaker 37 coupled to the output of the audio signal.

According to the invention, it is provided to establish a further communication connection to an already existing communication connection for a transmission of voice or audio signals. With the second connection video signals to the receiving unit 3 be transmitted.

The transmitter unit contains this 1 another entrance 132 For example, to a video camera 15 for detecting video signals I is connected. The analog image information I is from the video camera 15 converted into a digital video signal J and sent to the video encoder 11 transmitted. For example, the digital video signal J may include YUV encoded image information at a frame rate of 30 frames per second. The video encoder 11 generates from it a compressed digital video signal M. A compression is particularly useful if only a limited bandwidth is available for the data transmission of the video signal. For example, digital video information can be very well compressed and encoded using the MPEG or MPEG2 method. A compression and coding with the video encoder 11 also has the advantage that the video encoder 11 additionally time stamp or general time information K in the compressed video signal M can store. For example, the time information can be transmitted by means of RTP timestamps.

The total signal N is a data stream over the interface 18 to a second network 22 transmitted. In the present case, this represents the Internet, which forms a packet-oriented network. For transmission of packets of the data stream N, for example, a UDP / IP protocol can be used. The individual packets are distributed over several nodes within the Internet 22 finally as data stream O to the base station 24 transmitted to the receiving unit as a signal D using a mobile communication standard 3 transmitted.

The transmitted signal D is decoded and the video information therein in the form of the signal R to a video decoder 33 passed on. This decodes the video information contained in the signal R and gives it optionally via a buffer 35 to a screen 38 from.

Because of the network 22 used UDP / IP protocol may lead to a faulty data transmission of the video information or the data stream N and O respectively. For example, individual packets may be lost. It is also possible that the different packets of the stream N at different times at the base station 24 and thus in the receiver 3 arrive. Another problem is that there is no direct temporal relationship between the first communication connection for the transmission of the audio signals A in the first data stream D and the second communication connection for the transmission of the video signals I. As a result, image or audio signals can be output at different times. A synchronization between sound and picture is no longer guaranteed.

For a coordinated output of the signals A and I in the receiver is an analysis device in the transmission arrangement according to the invention 12 and an encoder 11a intended. The analyzer 12 is in the present example with the input 131 for the audio signals A coupled. It generates from the detected audio signal A identification features L, with the help of which sections or areas of the audio signal can be identified. The identification features may be associated with the coded video signal M so as to establish which portions of the audio signal belong to portions of the video signal. For this purpose, the analysis device decomposes in the exemplary embodiment 12 the audio signal in sections of the same length.

Each subsection of the audio signal is selected so that its output takes place in a temporally defined relationship to a representation of one or more images of the detected video signal. The analyzer 12 extracts from each subsection an identification feature L, a so-called fingerprint. This identifies the respective subsection of the audio signal A uniquely. The uniqueness is through the synchronization device 17 ensures that adds a time stamp K both the identification feature L and the corresponding section of the video signal. In other words, the identification feature L with the help of Synchronisationsseinrich tung 17 a portion of the video signal J in the video encoder 11 assigned.

The Identification feature is chosen so that it on the one hand especially robust against possible interference while the data transmission is. On the other hand, it is also robust against artifacts due to a signal processing or compression during the transmission of the first data stream B occur. These artifacts can affect the useful signal in the first data stream B.

The compressed video signal M and the identification feature are in the encoder 11a summarized to the data stream N.

4 shows a schematic representation to illustrate this assignment. The audio signal A, represented as a simple sinusoidal oscillation, is subdivided into different subsections TA1, TA2, TA3, each of equal length. In the embodiment, the length of each subsection TA1 to TA3 is correlated with the digital image information VB1 to VB3 of the video signal J. In the present case, subdividing the audio signal A into subsections to each second video image VB1, VB2 and VB3 of the digital video signal J. Da Video signal consists essentially of a number of temporally successive frames, it is easily possible to achieve a synchronization in that a particular section of the audio signal A is played back to a video image.

For each subsections TA1, TA2 and TA3 will now become a fingerprint, a unique identification feature FP1, FP2 or FP3 determined. This Fingerprint can be, for example, by LTP or LPC coefficients be determined. Such coefficients are used in coding of the speech signal A and can thus easily without additional effort to be used. Another possibility consists in the determination of particularly robust frequency information for each Subsection. After generation of the respective identification features These are the corresponding video image of the digital video signal assigned.

For an assignment On the one hand, the video images VB1 to VB3 and the generated identification features FP1 to FP3 with a time stamp K provided. This timestamp K allows the assignment of the identification features L to the coded Video signal M with the coded video images.

In the coding device 11a to 1 the identification features L and the coded video signal M are then combined. This can be done, for example, by multiplexing the two data streams L and M. The data stream N generated by multiplexing in the present example is designed as a packet-oriented data stream whose packets contain sections of the coded video signal M and the associated identification feature. Each packet contains the subsection VB1 to VB3 of the video signal J which is assigned to the corresponding identification feature FP1 to FP3.

Because of in the identification features L and the encoded video data stream M contained time stamps K is guaranteed even then an assignment if another form of package is chosen. So can Video data stream M and the identification features L also in different Packets or even different data streams.

A different possibility consists in the coded video data stream M, the identification features L as additional Information, engl. "supplementary enhancement information ". A video standard that allows this is the H.264 / AVC standard. An additional multiplexing can then omitted, the coded and provided with the features L video stream M forms the data stream N in such a case. Basically only an association between the identification features in the stream L and the video signal J guaranteed be.

Present includes 4 a packet of the multiplexed data stream N a header portion RTP, are stored in the header information for each data format and time stamp. Connected to it is a second portion in which the identification feature FP1 is stored. The video information part DVB1 contains the image information of the digital video signal J starting from the video image VB1 to the video image VB2. In a corresponding manner, the coding device multiplexes 11 Likewise, it adds the identification features FP2, FP3 from the feature stream L accordingly.

The thus prepared second data stream N is again through the second communication link via the network 22 to the recipient 3 transfer. The received data stream P comprises not only the coded video signal R but also the additional identification features Q.

The feature stream Q becomes the device 36 fed. This again determines the identification features and the timestamps that have been supplied to the identification features on the transmission side. In addition, the receiver contains 3 a synchronizer 34 , the input side with the output of the audio decoder 31 for supplying the decoded speech or audio signal F is connected. In addition, he is at the facility 36 for the signal U connected, which includes the identification features. The synchronizer 34 serves to, from the sections of the speech signal F of the audio decoder 31 To generate identification features. That from the synchronizer 34 The method used for generating the identification features essentially corresponds to the analysis apparatus 12 within the transmission arrangement 1 , The generated features will then match those of the facility 36 compared transmitted characteristics. If there is a match or a high similarity, it is assumed that a corresponding section of the video signal is present for the subsection of the speech signal F.

To ensure a concerted output is the audio decoder 31 in addition to a buffer device 23 connected for buffering the audio signals. Another buffer device 35 is used for buffering the decoded video signal W. They are used to correct a corresponding time offset due to different transmission times or due to the different signal processing. Both buffer devices 23 and 35 be from the synchronizer 34 controlled by the control signals V and X. Depending on the drive, the buffers supply the sub-sections G, Y of the speech signal F and the video signal W selected by the control signal to the output devices 37 and 38 from.

The synchronizer is with the video decoder 33 and the facility 36 for supplying the time stamp information S, T coupled. Together with the comparison of the identified identification features with the identification features of the device 36 and the timestamp information is generated by the synchronizer 34 the control signals V and X. It is useful, in addition to the audio buffer 23 also the video buffer 35 in the event that the video signal before the corresponding audio signal, the receiver arrangement 3 reached or the signal processing in the synchronizer takes longer than a decoding of the video stream R.

The additional buffering also makes it possible, in the case of lost data, to emit the corresponding signals of the respective other data stream. For example, areas of the audio signal F can also be output if the video signal W corresponding thereto is lost or not reconstructable during the transmission. Due to different delays in the two networks 22 . 23 it is expedient to choose a suitable buffer size. In addition, it may be useful, if the identifiers in the first or second data stream match, to not immediately output the corresponding sections, but to buffer them again instead. This has the advantage that later output can be largely continuous without any later delays due to longer signal propagation times in the network 2 ,

one Buffering or delay An output of the speech signal may also be by special processing of the speech signal. Instead of the buffer, a signal processor be provided, which is a time-based modification of the speech signal performs. So could the speech signal is dynamically distorted, e.g. vocal sounds at the output dynamically extended or shortened thereby causing a delay to reach. This "time scale modification "procedure is particularly suitable as a continuous output of the speech signal without Interruptions, but still time to process the second Data stream and the vote of an issue is won.

During the transmission of the first data stream in the network 23 and the second data stream in the network 22 it can lead to signal interference or signal changes. So in the first network 23 the encoded audio signals are otherwise processed. As a result, the frequency spectrum, for example phase information, of the first data stream B or its time behavior changes. It is therefore appropriate to choose identification features that are particularly robust against such interference. For example, the so-called LTP or LPC coefficients for the speech signal (Long-Term Prediction, Linear Predictive Coding).

2 shows a further embodiment of a system according to the invention with a transmission arrangement 1 , a receiving arrangement 3 and a network connected in between 2 , The transmitter 1 has a first detection device 130 for detecting the first useful signal, for example of speech signals. Another arrangement 150 serves here for generating and displaying a computer-aided presentation J '. The presentation J 'may include audio and additional video data as well as still pictures.

The first device 130 encodes the detected first useful signal and generates from the encoded first useful signal identification features L, which allow identification of subsections of the first useful signal. The identification features L are a coding device 110. transmitted. The coding device 110. is also on the second device 150 connected. It generates the second data stream N ', in which the identification features L are combined with the information about the computer-assisted slide show J'.

The second data stream is sent to the second network 220 while the encoded audio signals are transmitted through an antenna 190 to the first network 230 be sent. Both networks 220 . 230 are each with a base station 240 . 250 for a mobile communication link with the receiving device 3 coupled.

In the present case, the transmission of the first data stream, ie the voice signal and the second data stream, takes place via two different transmission channels. For example, the encoded audio data D in the form of a GSM signal to the receiver arrangement 3 be sent. The second data stream, on the other hand, is sent to the receiving arrangement via a second transmission channel D1 3 transmitted. The receiving arrangement 3 includes two receiver stages 310 . 330 which process the two signals in the different transmission channels. They contain a decoder for decoding the audio signal or the screen presentations. In the synchronizer 340 An allocation of subsections of the decoded audio signal to the corresponding sections of the computer-aided screen presentation using the identification features.

Illustrates another aspect of the invention 3 , Elements of the transmitter 1 or the network 2 with the same function or effect as elements in the design 1 bear the same reference numbers. In the illustrated embodiment, the analysis device for generating coded and provided with time stamps K audio signals L out leads. These serve as identification features and are combined with the coded and time stamped video stream M to the second data stream N. About the first network 23 Furthermore, the first data stream B is transmitted, which contains a coded speech signal. About the second network 22 the transmission of the data stream N. the receiving arrangement 3 ' is configured to decompose the received second data stream P back into the current Q and the current R. Furthermore, it contains the device 36 , which is embodied here for decoding the feature stream Q into speech signals U and time stamps S. Together with the existing time stamps S and T, which were added on the transmitter side as a time stamp K, a time-matched outputting of the speech signal U and the signal W is possible.

The synchronizer 34a is designed to, on the one hand, determine the voice quality and, in the case of an erroneous reception of the second data stream P, to switch over to the still existing first communication connection for the output of the voice signal F. This is useful, for example, in a transmission of the first and second data stream with different mobile radio standards. If, for example, the first data stream is transmitted as a GSM mobile radio signal and the second data stream is transmitted using the standard UMTS, a continuation of the circuit-switched communication connection is possible even if the second data stream fails.

With the elements of the invention the illustrated systems at an existing communication link for transmission a first data stream, a second communication connection for transmission a second data stream without interruption of the first communication link Add.

As well Is it possible, a new communication link for transmitting the first and the build up second data stream. A timely coordinated Output is made by the identification features added to the second data stream, derived from the first data stream. The additional Identification features in the second data stream are sent by the transmitter added. This is for example in the form of a fingerprint or additional Information within the for the second data stream used transmission protocol possible. moreover Further information can be transmitted, for example, timestamps. By using a suitable transmission protocol, for example The real-time protocol is adding timestamps to data or identification features are still formalized and their use simplified for synchronization.

Furthermore it is possible selbige identification features by another transmission channel to the recipient to convey. It only has to be guaranteed be that the identification features in the further transmission channel be assigned to the individual sections of the second data stream can.

5 shows an embodiment of the method according to the invention. In a first step S1, a receiving arrangement receives a first data stream in the form of a first signal. The data stream is processed and the useful signal contained therein is buffered in a buffer. Parallel or substantially simultaneously for this purpose, a second data stream is received in step S2. In addition to second payload data, this also contains identification features which are suitable for assignment to the payload signal in the first data stream. The identification features are derived from the first useful signal.

In step S3, the identification features contained in the second data stream are extracted. Subsequently, in step S4, subsections are made te the useful signal in the second data stream and the subsections associated with the identification features of the subsections of the first data stream. During steps S3 and S4, that is to say the determination of the identification features in the second data stream, it is possible to analyze the subsections of the buffered useful signal. This process takes place in step S5. In this case, identification features are determined from the individual subsections, which correspond in type and structure to the identification features of the second data stream. If, for example, the identification features in the second data stream represent LTP coefficients (Long Term Prediction), the LTP coefficients are also determined in step S5 from the individual subsections of the stored first data stream.

In Step S6 will now be the ones from the subsections of Use signal identified identification features with the or Identification features of the second data stream compared. For example can each identification feature of the subsections of the useful signal in the first data stream with each of the ones determined from the second data stream Identification features are compared. There are different ones in step S7 Comparison methods and methods available. The comparison can be so be designed that only with an exact match of an identification feature a subsection of the first data stream with an identification feature the second data stream generates a positive result.

There but maybe while a transmission Errors within the two data streams have occurred or through Signal processing or compression distortions or other changes may have occurred can also the identification features are slightly different. Therefore It may be appropriate for a decision in terms of a match to provide for certain freedoms. The match will therefore only determined with a probability. If this exceeds a predetermined Value, so will a match accepted. Another possibility would be a Correlation analysis for to carry out the identification features of the first and second data stream.

results the comparison process in steps S6 and S7 that the identification features the sections of the first data stream with the one or more identification features do not match in the second stream, will be the comparison with new identification features of the first or second data stream repeated. On the other hand, if there is a match in step S8 associated with the two identification features Portions of the first and second data streams are loaded from the buffer. Finally, in step S9, the sections become time-sequential spent spent.

By the caching of the first data stream and the caching of the second data stream he has a time delay while correcting a reception operation of the first or second data stream. By analyzing the useful signals in the first data stream and the Determination of the identification features eliminates the need to be already to insert in advance timestamps in both data streams for later output.

Much more can be provided in the second data stream any useful signals in subsections wherein each of the sub-sections associated with identification features when these are synchronous with the subsections of the wanted signal to be output in the first data stream. A special choice the second useful signal is not necessary. For example can by the presented method a video signal as a useful signal of the second data stream using the identification features an existing transfer of a Voice signal synchronized. It is not necessary the first and second data streams over the same transmission channel at a receiver to convey.

5 shows an extension of the inventive method, which is taken into account when parts of the first or second data stream are lost or damaged during transmission. In this embodiment, it is assumed that the first data stream forms an analog or digital telephone signal for the transmission of audio signals. This is delivered from the transmitter to the receiver via several nodes.

To the existing communication connection is now a second Data stream added which includes a second useful signal corresponding to the telephone signal is synchronized. For this purpose, in step S10, the first and the second data stream substantially simultaneously via a common transmission channel receive. This transmission channel can represent, for example, a mobile connection according to the UMTS standard. Another possibility would be, example, the first data stream over a telephone connection and the second data stream packet-oriented over a DSL connection too receive. In such a case, the transmission of the two data streams via the same physical line.

In step S11, the common received signal is decoded or separated into the first and the second data stream. The first data Current as a telephone signal is divided into different sections of equal length in step S12. However, these sections are not arbitrary, but follow a predefined pattern that results from the first data stream. In step S16, these sections are cached for later processing.

To the processing of the first data stream in steps S12 and S16, the second data stream is also processed with the second useful signal. The second payload also includes several subsections, the be separated in step S13. Certain sections is each assigned an identification feature that from the second Data stream is extracted and stored in a memory.

in the Generally, the reception of the first and second data streams takes place Although at the same time, this does not mean that the corresponding Sections of the first and second useful signal a specific have temporal relationship to each other. For example, due to different transmission paths between the sender and the receiver a time offset between corresponding sections of the first data stream and subsections of the useful signal in the second Data stream occur. In other words, sections of the first Data stream earlier or later at receiver arrive as the corresponding sections of the second Useful signal. If this time offset now becomes greater than a predetermined value, it is no longer appropriate, late arrivals Cache subsections. This is not the case especially more useful if, for example, previously arrived Subsections of the first data stream further processed and, where appropriate already spent.

in the In this case, it is assumed that the second useful signal across from Delayed the phone signal is. In step S15, therefore, it is checked whether the the identification features associated with the subsections of the second data stream already spent. This can be done by a quick comparison the extracted identifiers of the subsections of the second useful signal with identification features of already issued sections of the first data stream. Another possibility for such a review exists then, if individual subsections of the second useful signal in second data stream time stamp information are assigned. In order to can all the subsections are discarded that have a timestamp include, before the last issued time stamp of a subsection lie of the second useful signal.

If In step S18, such a comparison of a match shows the corresponding subsection of the second useful signal in step S19 discarded because the output to this section synchronously Part of the first data stream has already been issued. at best In step S20, the subsection of the second user signal as well the associated Identification stored.

In Step S17 is an analysis and determination of the identification features the subsections of the first data stream made.

In Step S21 will now be the identification features of the subsections the first data stream with the identification features of the compared to the second data stream. Returns such a comparison in step S22 a match, this essentially means that the subsections of the first and second data stream are outputted coordinated should. These are loaded from the respective cache in step S23 and output synchronously in step S24.

If however, a subsection of the second useful signal to the corresponding Subsections of the first data stream not yet received and has been processed, the comparison process in the steps S21 and S22 no match. In such a case, it is assumed that the corresponding Subsection in the second data stream has not yet been received. Therefore At step S25, a counter becomes elevated. The counter indicates whether the subsection in the phone signal despite missing Subsection is to be output in the second useful signal. To becomes the counter in step S26 is compared with one in the predetermined value. Is the counter smaller than this value, so the process with the other Analysis of newly received subsections of the first data stream continued.

Otherwise will if the counter greater than. in step S25 the predetermined value is, in step S27, the next one to be output Part of the telephone signal determined and output in step S28. The identification feature associated with the issued subsection is now marked as already issued and serves a subsection the second useful signal with the same assigned identification feature to identify. As the associated Partial section in the first data stream has already been issued the subsection in the second data stream is discarded.

It is appropriate, at the design of the method both a delay of Subsections of the first data stream relative to the subsections of second data stream, as well as the reverse possibility to take into account.

6 shows a further embodiment of the method according to the proposed principle. In this exemplary embodiment, besides the method steps for receiving the first and second data streams, the method steps during the transmission process are also shown.

In step S30, a communication link for transmitting a first useful signal or a first data stream is set up between a transmitter and a receiver. The structure is circuit-switched and remains until the end. The first data stream contains the useful signal, for example a voice signal. During a period of time that follows, in step 31 a continuous communication. Voice is transmitted from the sender to the receiver via the circuit-switched connection.

These Communication is also in step S32 on the already existing Connection continued. additionally should now to the already existing first communication connection a second communication connection can be set up via the transmit second data stream becomes. The useful signal of the first and second data stream to each other done synchronously. These are the first and the second useful signal each divided into sections.

During the continuation the first communication connection and the transmission of the first user data in step S32, in step S33, a second communication connection is made via another transmission channel built up. This transmission channel can be opposite the transmission channel for the first communication connection be constructed differently. While, for example, the first transmission channel for the first communication connection comprises a landline connection includes the second transmission channel a packet-oriented internet connection.

In Step S34 will now be a voice or audio signal in the form of several Subsections detected as the first useful signal. Essentially at the same time and synchronously, a corresponding video signal is generated in step S35 detected, which also has several sections. In step S36, identification features are determined from the detected audio signal. These features can both from the captured analog audio signal, as well as from a digital Audio signal or an already coded audio signal can be determined. The term encoded audio signal is processed Understood audio signals that were encoded by a method. examples for such coding methods are the AMR or AMR-WB coding method, the GSM EFR coding method, G.72x coding method of the ITU-T Standards for Voice compression or combinations thereof. These are suitable especially for a voice coding.

The Identification features that were determined in step S36 allow a unique identification of the respective subsection of Speech signal. For a coding according to one of the above It is also conceivable method, while generating features during coding are also to be used as identification features. So can the in the AMR coding, LPC coefficients also generated as identification features serve. About that In addition, the generated identification features should be particularly robust against during the transmission be the first data stream occurring disturbances or artifacts.

The Identification features determined in step S36 are used during the Coding of the subsections of the video signal in step S37 added second stream. This is done such that an identification feature of a subsection the voice signal associated with a subsection of the video signal which is synchronous with the corresponding section of the speech signal stands. This is achieved by timestamp or a suitable one Combining the video signal and the identification features.

To one coding of the video signal in the step S37 becomes the second one Data stream and the first data stream in steps S38 and S39 transferred. The transfer can have different transmission channels as well a common transmission channel include. Under a common transmission channel becomes a transmission channel on the same frequency, using the same communication standard or understood using the same network nodes. During the However, steps S38 and S39 may cause a time shift or a time delay come of the first and second data stream to each other. By doing so he follows a reception of the first data stream in step S40 and a reception of the second data stream in step S41 at different times.

In step S42, the received first data stream is decoded and the speech or audio signal contained therein is extracted. This is subdivided into several sections, each of which is analyzed and an identifier is extracted. In parallel, in step S43, the received second data stream is further processed. The identification features added in the second data stream of the subsections of the video signal are extracted. These identification features are now in step S44 with the generated identification features of the subsections of the cached Audio signal compared. If the comparison gives a match in step S46, the respective subsections of the audio signal and the video signal are loaded in step S45 and output synchronously in step S47. Otherwise, in step S48, the audio signal may be output without a corresponding video signal.

There the order of the subsections of the audio signal is detected, can as well as portions of the audio signal are output, the time lie before a subsection of the audio signal, to which a corresponding Part of a video signal was found. This can be done especially with an error-prone transfer of second data stream, a continuous output of the audio signal guarantee.

The The method presented has the advantage that it is easier Way to existing mobile standards or communication links apply. In particular, it is possible without big ones Extra effort to continue an existing communication connection. It must only guaranteed be that the received first circuit-switched user signal buffered will, so a synchronization with any later received second data stream ensured is. It is not necessary that every subsection of the first useful signal is analyzed. This is rather dependent on the requirements of the second data stream. For example, if video signals at thirty Transfer images per second be, it may be appropriate the voice or audio signal in 1/30 second increments to disassemble and from each of these subsections a corresponding To extract identification features. However, it is equally possible only every xth image of the video signal is an identification feature of a corresponding subsection of the audio signal to assign. there it is in the inventive method conceivable that the receiver does not know the exact assignment. Nevertheless, a synchronous output provided the subsections of the audio signal to which no Part of the video signal is assigned, also continuously be issued.

Next the synchronization of a video signal to a corresponding audio signal he lets the process of the invention and apply the orders to all streams that are timed to each other contain tunable user data. For example, it is also possible to have one common video signal over several transmission channels and several streams at a receiver to convey. Also conceivable is a voice or audio transmission in several data streams (or Signals), for example to allow a stereo signal. A synchronization of the data streams can be done as indicated. Also, the method and the arrangement is not on the Syn chronization of two data streams limited, but can be extended to multiple streams, provided each time to be synchronized payload the generation of unique allow assignable identification features.

1

transmitter

2

network

3

receiver

11

video encoder

11a

coding

12

analyzer

15

Contraption, camera

22 23

network

23 35

Buffer means, Storage

24 240, 250

base station

31

Audio decoder

33

video decoder

34

synchronizer

36

Facility

37, 38

output device

131

Entrance, microphone

151

Entrance, video camera

Claims (62)

Method for receiving with a first data stream, having at least two successive sections and with a second data stream comprising the steps: - receive and delay the first data stream; - receive of the second data stream (P) with a useful portion (W) and a first one Identification feature (Q, U), that of a first subsection the at least two successive sections of the first Data stream (E) and derived to an identification of the first Subsection is usable; - Determining the first identification feature (Q, U) in the second data stream (P); - Determining the first section in the first data stream (E) in dependence the first identification feature (Q, U); - Output of the useful portion (W, Y) of the second data stream (P) in time using the first identification feature tuned to an output of the first Subsection. The method of claim 1, wherein the step of determining the first subsection in the first data stream (E) comprises the steps of: deriving an identification feature from at least one of the subsections in the first data stream (E); - Comparing the determined first identification feature (Q, U) with the derived identification feature of the at least one subsection of the first data stream (E). Method according to one of claims 1 to 2, wherein the step of receiving the first data stream comprises the steps of: - providing a first useful signal (A) comprising at least two successive subsections; Deriving an identification feature (L) from at least one of the successive subsections, which is usable for an identification of the at least one subsection of the successive subsections; - generating the first data stream (B) from the first useful signal; Transmitting the first data stream (B, C) over a network ( 23 . 24 ); Receiving the first data stream (D, E) from the network ( 23 . 24 ). Method according to one of claims 2 to 3, wherein the step deriving an identification feature (L) at least one the following steps include: - Generate coefficients the first subsection, which is for a long term prediction are suitable; - generating coefficients from the first subsection, which is for a Linear Predictive Coding are suitable; - Produce of frequency information derived from a content of the first subsection are derived; - Produce HASH sequences from the first section; - Produce a checksum from the first section; - Generate a coded Part of the first section. Method according to one of claims 1 to 4, wherein the useful portion (W, J, M) of the second data stream at least two subsections and a subsection (Y) of the at least two subsections the first identifier is assigned, and the output the first subsection (G) of the first data stream and the subsection (Y) of the second data stream is timed to each other. Method according to one of claims 1 to 5, wherein the step receiving the second data stream comprises the steps of: - Provide from a second useful signal (J, M); - Provide at least a first identification feature (L); - Generating the second data stream (N, O, P) by assigning the at least one first identification feature (L) to the second useful signal (M); - Transferring the second data stream. The method of claim 6, wherein the step of Providing the second useful signal (J, M), a decomposition of the second Usage signal (J, M) in at least two consecutive sections comprises and in the step of generating the second data stream (N, P) at least one first identification feature (L) one of the successive the following sections of the second useful signal (J, M) assigned becomes. Method according to one of claims 1 to 7, wherein the step receiving the second data stream comprises the steps of: - Disassemble of the second data stream (P) into the second useful signal (R) and in the first identification feature (L); - Delay or cache the second useful signals. The method of claim 8, wherein the step of Issuing the second data stream outputting the cached second useful signals timed to output of the first subsection. Method according to one of claims 1 to 9, wherein the first Data stream (B, E) comprises at least one of the following useful signals (A): - analog Audio signals; - digital Audio data or digital audio signals - encoded audio signals; - μ-law coded Audio data or μ-law encoded audio signals - GSM EFR encoded audio data or GSM EFR encoded audio signals; - PCM coded Audio data or PCM encoded audio signals; - AMR encoded audio data or AMR encoded audio signals; - AMR-WB encoded audio data or AMR encoded audio signals; - G.729 encoded audio data or G.729 encoded audio signals; - encoded audio data or encoded audio signals according to one of the G.72x procedures of the ITU-T standard for the Voice compression. The method of claim 10, wherein the first identification feature (L) one of the useful signals of the first data stream or the useful signal of the first data stream. The method of claim 11, wherein the output of the first subsection with a faultless presence of the Identification feature is suppressed in the second data stream. Method according to one of claims 1 to 12, wherein the step outputting the first and / or second data stream, the step converting the first and / or second data stream into a speech signal or an audio signal and / or a video signal. Method according to one of claims 1 to 13, wherein the second Data stream (N, P) at least one of the following useful signals (J, R) includes: - one Video signal, especially in MPEG, MPEG2, H.26x format - Images or image data, in particular in jpeg format; - Dates for one computerized Slide Show; - audio data or audio signals; - time-based Text, scrolling text. Method according to one of claims 1 to 14, wherein a transmission the first and / or second data stream at least partially by transmission of signals according to a mobile communication standard. Method according to one of claims 1 to 15, wherein a transmission of the first and / or second data stream at least partially by an Internet connection ( 22 ) between at least two nodes. Method according to one of claims 1 to 16, wherein a transmission of the first and / or second data stream (B, N) at least partially by a wired communication link ( 22 ) he follows. Method according to one of claims 1 to 17, wherein a transmission of the first and / or second data stream (B, N) at least partially via a circuit-switched communication link (B, N). 23 ) he follows. Method for transmitting a first data stream, the has at least two successive sections and a second data stream, comprising the steps: - To capture a first useful signal (A) and a second useful signal (J, M); - Determine at least one identification feature (L) from the first useful signal (A), which allows identification of the first useful signal; - assign the at least one identification feature (L) to the second Useful signal (J, M); - Produce of the first data stream (B) from the first useful signal and generating of the second data stream (N) from the second useful signal (M, J) and the at least one identification feature (L). The method of claim 19, wherein the step Assigning the steps includes: - Provide a timestamp (K) with a clear time information; - assign the timestamp (K) to the identification feature (L) and a portion of the second useful signal (J, M). A method according to any one of claims 19 to 20, wherein the Step of detecting the first wanted signal (A) and the second one Useful signal (J) comprises at least one of the following steps: - To capture a speech signal; - To capture an audio signal; - To capture a video signal; - Coding an audio signal, a speech signal, or a video signal; - To capture a computer aided Slide Show; - To capture of running text; - Disassemble the detected useful signal in sections. A method according to any one of claims 19 to 21, wherein the Step of determining at least one identification feature at least one of the following steps: - Produce an encoded signal from the detected first payload signal; - Produce of coefficients from the detected first useful signal or from subsections the first payload based on long term prediction; - Produce of coefficients from the detected first useful signal or from subsections the first payload based on Linear Predictive Coding; - Produce of frequency information from a content of the first useful signal or from a content of subsections of the first useful signal; - Produce of HASH sequences from the first payload or from subsections the first useful signal; - Produce of checksums from the first useful signal or from subsections of the first useful signal. Method for transmitting a first and a second data stream from a transmitter to a receiver, comprising the steps: - establishing a first communication connection between transmitters ( 1 ) and receiver ( 3 ) for transmitting the first data stream; - transmitting the first data stream (B) over the first communication link to the receiver ( 3 ); - Generating a second data stream (N) with a useful signal (M), wherein the second data stream (N) from the first data stream derived identification features (L) associated with the useful signal (M) of the second data stream (N); - Transferring the second data stream via a second communication link to the receiver; Receiving the first and receiving the second data stream (E, P); - determining the identification features in the second data stream; - Timed mutually outputting the first data stream and the useful signals in dependence of the determined identification features. The method of claim 23, wherein the step of transferring the first data stream comprises the step: - To capture a first useful signal (A); - Disassembly of the first useful signal in subsections and - Determine at least one first identification feature (L) for identification a first subsection of the first useful signal (A); - Produce of the first data stream from the subsections. The method of claim 24, wherein the step generating the first data stream (B) or the step of detecting from a first useful signal (A) comprises the step of coding after at least one of the following methods: - GSM EFR; - AMR; - AMR-WB; - G.729; - G.72x according to the ITU-T standard; - μ-law. Method according to one of claims 23 to 25, wherein the step generating a second data stream comprises the steps of: - To capture from a second useful signal (J) having a plurality of subsections; - Produce a second data stream (N) from the second useful signal (J, M) and the identification features derived from the first data stream (L), wherein each subsection of the second data stream one of derived from the first data stream identification features for a later time coordinated output is assigned. A method according to any one of claims 23 to 26, wherein the Step of timing out the steps includes: - Determine identification features of the first data stream; - To compare the identified identification features of the first data stream with the identification features of the second data stream; - Output the first data stream and the identification features associated Useful signals of the second data stream depending on the comparison. A method according to any one of claims 23 to 27, wherein the Step of receiving the first data stream the step one Caching the first data stream includes. Method according to one of claims 23 to 28, wherein in the Steps of transferring the first communication connection and the second communication connection at least partially comprise a shared signal path. A method according to any of claims 23 to 29, wherein the step establishing a communication link additionally the step of transmitting a third data stream for communication between transmitter and receiver time before transferring of the first data stream. A method according to any one of claims 23 to 30, wherein the first data stream comprises at least one of the following useful signals: - analog Audio data or audio signals; - μ-law encoded audio data or Audio signals - GSM EFR encoded audio data or audio signals; - AMR or AMR-WB encoded Audio data or audio signals; - G.729 encoded audio data or audio signals; - coded Audio data or audio signals according to one of the G.72x methods of ITU-T standards for the voice compression; - Fax data. The method of claim 31, wherein the identification feature in the second data stream comprises the useful signal of the first data stream. The method of claim 32, wherein the output the first data stream in the presence of the identification features suppressed in the second data stream becomes. A method according to any one of claims 23 to 33, wherein the Step of outputting the first and / or second data stream Step of converting the first and / or second data stream into Audio signals and / or video signals. A method according to any one of claims 23 to 34, wherein the second data stream comprises at least one of the following useful signals: - video data, especially in MPEG, MPEG2, H.26x format - Image data, especially in jpeg format; - Dates for one computerized Slide Show; - audio data or audio signals. Method according to one of claims 23 to 35, wherein a transmission of the first and / or second data stream at least partially by A transmission of signals according to a mobile communication standard; - An Internet connection between at least two nodes or - a wired communication connection takes place. Transmission device comprising: - a first device ( 151 ) for detecting a first useful signal; A second device ( 15 . 151 ) for detecting a second useful signal; An analysis device ( 12 . 12a . 110. ), which is designed to determine and provide at least one identification feature (L) for identifying the first subsection from a first subsection of the first useful signal; A coding device ( 11 . 11a . 110. ) carried out by the analysis device ( 12 . 12a ) to allocate the identification feature provided to a first subsection of the second useful signal; A first transmission stage ( 13 ) for transmitting the first useful signal; - A second transmission stage for transmitting the second useful signal. Transmission arrangement according to Claim 37, in which the first and the second device ( 131 . 15 . 151 ) for substantially simultaneously detecting the first and second payloads. Transmission arrangement according to one of Claims 37 to 38, in which the analysis apparatus ( 12 . 12a ) for generating identification features, which has at least one of the following features of the first subsection of the first useful signal: Long term prediction coefficients; - coefficients derived from a linear predictive coding; A frequency information of a content of the first subsection; A HASH sequence; - a checksum of the first subsection. Transmission arrangement according to one of Claims 37 to 39, in which the coding device ( 11a ) a synchronization device ( 17 ) comprises for an assignment of the provided identification feature to a subsection of the second useful signal, which has a predetermined temporal relationship to the first subsection of the first useful signal, in particular to the first subsection is temporally synchronous. Transmission arrangement according to one of Claims 37 to 40, in which the first transmission stage for transmission on a first transmission channel ( 23 ) and the second transmission stage for transmission on a second transmission channel ( 22 ) is executed. Transmission arrangement according to claim 41, wherein the first and the second transmission stage form the same transmission stage and / or the first transmission channel and the second transmission channel the same transmission channel is. Transmission arrangement according to one of Claims 37 to 42, in which the first device ( 13 . 131 ) for capturing audio data and / or audio signals. Transmission arrangement according to one of Claims 37 to 43, in which the first device ( 13 . 131 ) is carried out for coding the first useful signal with at least one of the following coding types: a coding according to μ-law of a speech or audio signal; A coding according to GSM EFR of a voice or audio signal; A coding according to AMR of a voice or audio signal; A coding according to PCM of a voice or audio signal; A coding according to AMR or AMR-WB of a voice or audio signal; A coding according to G.729 of a voice or audio signal; A G.72x coding according to the ITU-T standard for voice compression. Transmission arrangement according to 40, in which the synchronization device ( 17 ) is provided for providing a time stamp which can be assigned to the provided identification feature and to the subsection of the second useful signal for a determination of the temporal relationship. Transmission arrangement according to one of Claims 37 to 45, in which the second device ( 15 ) for detecting at least one of the following signals: - audio signals; - video signals; - data-based presentations; - Images; - text. Transmission arrangement according to one of Claims 37 to 46, in which the second device ( 15 ) or the coding device ( 11 . 11a ) for coding the first useful signal with at least one of the following coding types: H.26x coding of video signals; - MPEG or MPEG2 encoding of video signals. Receiving arrangement for the synchronization of first and second payload signals, wherein in the second payload identification features are stored, which are derived from sections of the first payload, the receiving arrangement comprising: A device ( 31 . 32 ) for the controlled delivery of the first useful signal; An analysis device which is designed to provide an identification feature for identifying a first subsection from the received first useful signal; - a synchronizer ( 34 . 34a ) for synchronizing an output of the first and second useful signal on the basis of a comparison of the identification features stored in the second useful signal with those of the analysis device ( 36 . 36a ) provided identification features. The receive device of claim 48, further comprising: - one second buffer for storing the second useful signal. Receiving arrangement according to one of Claims 48 to 49, in which the first device ( 32 ) is executed to a buffering of the first useful signal. Receiving arrangement according to one of claims 48 to 50, in which the first device to a time-scaled change executed the first useful signal is. Receiving arrangement according to one of claims 48 to 51, in which the synchronizer has a comparison device, configured to deliver a control signal to a synchronization device in response to a comparison of the stored in the second payload signal Identification features with those provided by the analyzer Identification features, the synchronization device with the first device coupled to control the delivery of the first Useful signal. A receiving arrangement according to claim 52, wherein the Comparator for analysis of similarity or correlation between the identification features stored in the second useful signal and provided identification features. Receiving arrangement according to one of claims 48 to 53, further comprising: - a first decoding device ( 31 ), which is connected on the output side to the first intermediate memory and is designed to generate the first useful signal from a first signal received by the receiving device; A second decoding device ( 33 ), which is designed to generate the second useful signal from a second signal received by the receiving device. A receiving arrangement according to claim 54, wherein the Reception arrangement for a reception of the first signal and the second signal in one common transmission channel accomplished is. A receiving arrangement according to claim 54, wherein the second decoding device for a removal of the second useful signal stored identification features is executed. Receiving arrangement according to one of claims 48 to 56, wherein the first subsection of the first useful signal at least one of the following signals comprises: An analog audio signal; - a GSM EFR encoded audio signal; An AMR encoded audio signal; - a PCM encoded audio signal; - one AMR or AMR-WB encoded audio signal; A G.729 coded audio signal - an encoded Audio signal according to one of the G.72x methods of the ITU-T standard for voice compression; - mu-law encoded audio signal. Receiving arrangement according to one of claims 48 to 57, in which the analysis device for providing the identification feature accomplished are one of the following features of the first subsection of the first useful signal comprises: - Long term prediction coefficients; - from a Linear predictive coding derived coefficients; - a frequency information a content of the first subsection; A HASH sequence; - a checksum of first subsection. System comprising a transmitting arrangement and a receiving arrangement, - in which the transmission arrangement for a delivery of a first useful signal and a second useful signal is formed, wherein the second useful signal identification features which are derived from the first useful signal; - in which the transmission arrangement for transmission the first and second payload signals are applied to the receiving device; - in which the receiving arrangement for determining identification features executed from the first useful signal is; - at the receiving arrangement to a synchronous output from the first and second payload signals derived by a comparison of the identified identification features with the formed in the second useful signal identification features is. The system of claim 59, wherein the transmission of the first and second payload signals at least partially over a common transmission channel takes place. A system according to any one of claims 59 to 60, wherein the transmission of one of the first and second payload signals is at least in part via a landline connection ( 23 ) or an internet connection ( 22 ) between at least two communication devices. A system according to any one of claims 59 to 61, wherein the Reception arrangement for a temporally synchronous output of an audio signal and a video signal is.