WO2002078247A2

WO2002078247A2 - Method for the transmission of encoded information

Info

Publication number: WO2002078247A2
Application number: PCT/DE2002/000999
Authority: WO
Inventors: Heiner Schepers; Gerold Bertram; Maik Scholz
Original assignee: Robert Bosch Gmbh
Priority date: 2001-03-22
Filing date: 2002-03-20
Publication date: 2002-10-03
Also published as: DE10114034A1; WO2002078247A3

Abstract

A method for the transmission of encoded information is disclosed, which serves to add the encoded information to a data stream, whereupon said encoded information is decoded on the receiver side and then used for allotting a discount or a cash payment. The data stream is advantageously sent by means of digital broadcast signals, whereby digital broadcast transmissions such as DAB have convenient possibilities for additional information inclusion. The encoded information can then be decoded by means of a chipcard and also stored on said chipcard. The encoded information is then mostly transmitted with advertisements, in order to thus generate a direct relationship with a product and producer. The allotting of a discount or cash payment can either be achieved with the chipcard in an electronic manner or by input on a terminal.

Description

Process for the transmission of encrypted information

State of the art

The invention relates to a method for the transmission of encrypted information according to the preamble of the independent claim.

It is already known that digital broadcasting methods such as DAB (Digital Audio Broadcasting) or DVB (Digital Video Broadcasting), IBOC,

Sirius, XM, videotext, SWIFT, DARC and RDS (Radio Data System) digital additional information can be transmitted to the audio program.

Advantages of the invention

The method according to the invention for the transmission of encrypted information with the features of the independent claim has the advantage that the user of the receiving device receives an added value on this receiving device, since he pays a lower price for products which he would like to purchase. The broadcaster or the provider that provides the data stream have the advantage that the user unites his listeners or viewers through the discount information Creates added value and therefore becomes more attractive. For a provider of products, it is still understandable when the user added the discount information and can thus optimize product advertising information if necessary.

By the provisions recited in the dependent claims provisions and refinements advantageous improvements of the independent claim ^■ method for transmitting encrypted information are possible.

It is particularly advantageous that the data stream is sent with digital radio signals such as DAB or DVB. In particular, the digital radio transmission methods such as DAB and DVB allow additional digital information about the audio programs or multimedia data to be transmitted in a very simple manner. The broadcaster is extremely free to select files that are to be transmitted via broadcast signals. That almost any format and file size can be transferred.

Furthermore, it is advantageous that the encrypted information that is used for granting a discount or cash payment is decrypted at the receiving end by means of a chip card and also stored on this chip card. This makes it very easy for a manufacturer to determine customer behavior through the issue of chip cards. It also enables you to control how many discounts or cash payments are granted.

It is of great advantage that the encrypted information, i.e. the discount grants or Cash payments, mainly transmitted with advertising. This enables a direct reference to the advertised product and the granting of a discount. Furthermore, it is thus possible to persuade a listener or viewer or service user to continue to hear, see or use this service or radio program, even if advertising is also shown. In particular, it is also possible to assess how successful an advertising strategy is for a producer, which may then lead to an optimization of this advertising strategy:

In addition, it is advantageous that a transmitter is available, with which the information can be encrypted, with which further data are multiplexed into a data stream and modulated in order to then be transmitted.

A receiver for carrying out the method according to the invention is also advantageously present, this receiver having means for receiving the data stream with the encrypted information for granting a discount and also for decrypting this encrypted information. In addition, it is advantageous that the receiver has a receiving device for a chip card, with which the encrypted information can be decoded and stored, so that it is then possible with the chip card to go to a terminal and get the discount or receive a payout directly. This terminal can then be, for example, a cash register in a shop and can then be used like a cash card.

drawing Exemplary embodiments of the invention are shown in the drawing and are explained in more detail in the following description.

1 shows a block diagram of a transmitter according to the invention,

FIG. 2 shows a block diagram of a receiver according to the invention,

FIG. 3 shows a top view of a chip card according to the invention,

FIG. 4 shows a schematic illustration of a terminal according to the invention,

Figure 5 is a flow diagram of the method according to the invention.

description

In electronic media as radio, television ^'and internet, but also in magazines, the use of advertising to keep down the price of these media or even offer them for free is actively used. However, since consumers of these media are now trying to bypass advertising or change channels, it is necessary to make it more attractive to users. digital

Radio transmission systems such as DAB or DVB have convenient options for transmitting additional data to the audio programs. It is also possible and necessary for many service providers to offer advertising through banners or links on the Internet in order to remain able to do business. According to the invention, encrypted information is now added to a data stream, which is then decrypted at the receiving end and can later be used for a discount or cash payment. This encrypted information is used in particular with

Advertising is sent in a data stream that is transmitted with digital radio signals. For decryption or decoding, a chip card can be used at the receiving end, in which case the decrypted information is also stored on the chip card. With the chip card, a user can then go to a terminal and have the discount granted or disbursed there. Alternatively, it is possible that this information contains a code with which the discount or cash payment is achieved. This

Possibility is particularly useful for the electronic use of this information, for example via the Internet at an online retailer.

Figure 1 shows a block diagram of a transmitter according to the invention for performing the method according to the invention. A data source 1 is connected to a data input of an encoder 2. The encoder 2 is connected to a first data input of a multiplexer 5. A source encoder 4 is connected to a second data input of the

Multiplexers 5 connected. The multiplexer 5 is connected to a data input of a modulator 6. The modulator 6 is connected to a data input of a transmission device 7. The transmitter 7 is connected to an antenna 8 via its output.

The data sources 1 and the audio source 3 are each storage devices, for example tapes or hard disks. The encoder 2 now encrypts the information that will later be used to grant the discount become. The multiplexer 5 adds this encrypted information to the digital data stream, which consists of digital audio data. The digital audio data are source-coded by the source encoder 4 so as to optimize the size of the data stock. The resulting data stream is then transmitted from the multiplexer 5 to the modulator 6, which on the one hand carries out a modulation and on the other hand, since this is DAB, carries out an OFDM (Orthogonal Frequency Division Multiplex) modulation. So it will be through the

Modulation first modulates the information and then distributes these modulation symbols to different subcarriers that are specific to the OFDM. This has the advantage that frequency-selective fading, which occurs in atmospheric transmissions, does not have as great an effect on the reception quality of the radio signals. The transmission device 7 then carries out a transmission amplification and sends the signals with the antenna 8.

In Figure 2 is a block diagram of an inventive

Shown receiver. An antenna 9 is connected to an input of a high-frequency receiver 10. A data output of the radio-frequency receiver 10 leads to a processor 11, the first data input / output of which leads to a memory 12. The processor 11 is connected to a signal processing unit 15 via a first data output and to a signal processing unit 13 with a second data output. The signal processing unit 13 controls a display 14, while the signal processing unit 15 controls a loudspeaker 16.

The radio signals are received by the antenna 9 and then amplified, filtered and converted into an intermediate frequency by the radio-frequency receiver 10. Digitization is also carried out using data. The resulting one The data stream is then transmitted to a processor 11, which performs demodulation and decoding of the data stream. With the help of data contained in the memory 12, it is also possible to decrypt the encrypted information that is used to grant the discount. The memory 12 is therefore also representative of a memory located in the radio receiver and / or of the chip card which is used as external memory. A corresponding read / write device is then available for the chip card.

Processor 1 then writes the decrypted information to chip card 12. The data contained in the digital radio signals are used on the one hand for optical representation by means of display 14 and on the other hand for acoustic reproduction by means of loudspeaker 16.

In addition to the free space transmission shown here, it is also possible for the method according to the invention to be carried out via wired transmission, for example via cable reception. A cable tuner is then used instead of the antenna 9. Transmission via the Internet is also possible here, in which case the data must then be actively downloaded by the user in order to be able to be downloaded onto his

Save the hard disk and then decode it there. A chip card can then also be written to. However, you can then also use them electronically, for example by going to an online retailer and receiving a discount with this data. Even then there is one

Decryption necessary so that misuse of this data is not possible. In addition, not decoding would mean that the producer would no longer be able to measure the success of his advertising. FIG. 3 shows a chip card as a top view for carrying out the method according to the invention. The chip card 17 has a memory field 18 which can be written to by the receiver which has been shown in FIG. The memory array 18 also contains data that is used to decrypt the information. This chip card 17 is then distributed by producers or radio broadcasters in order to obtain a control option for the discount grants. Through the. Determining the size of the memory 18'- ¹ it is also possible to determine how many

The maximum amount of discounts or cash payments a customer can load at a time. This also enables control to keep financial burdens within limits. For example, it can be provided here that a maximum amount of DM 10 can be granted through such discounts.

FIG. 4 schematically shows a terminal that can be used for cash payments or discounting by using the chip card. A display 19 shows the amount, while a computer unit 20 for controlling the

Display 19 and to calculate the discount. A reader 21 is used to hold the chip card. This terminal shown here can in particular be a cash register or a terminal that is used, for example, to pay out money, that is to say an Automatic Teller Machine (ATM).

FIG. 5 shows the method according to the invention as a flow chart. In method step 22, the information for the granting of a discount or cash payment is provided in the memory 13 and then encrypted in the encoder 2. The encryption should be done in such a way that a simple decryption is not possible by listening. Therefore, encryption or decryption according to the concept of public or private key. With the chip card, a customer then receives a private key with which he can decode the encrypted data. It is therefore possible to have this key, which can also be limited in time, for example that the chip card can only be valid for a certain period, half a year or a year. It is also possible to prevent abuse.

In process step; ' 23 the encrypted information is added to the data stream which is transmitted anyway. As shown above, this data stream consists of audio data. However, it is also possible that this is television data or Internet data or other multimedia data (video, image, graphics, text, animation). The encrypted

Information is particularly mixed in with advertising, in order to have a direct connection to the recording of advertising by a user and thus also to have a control or monitoring option for the distribution of advertising and the recording of advertising.

The main advantage, however, is that through the encrypted information that promises a financial gain, the customer continues to consume the advertising without switching to another program or data service. The corresponding data streams are then appropriately marked on the transmission side in order to precisely assign this encrypted information to the advertisement.

In method step 24, the modulation and the sending of the digital data stream then take place as radio signals.

In method step 25, the reception of these radio signals is then carried out by a receiver, in which case then in In addition to the radio data, method step 26 also includes the decryption or decoding of the information which is used for granting a discount or paying out money.

Finally, in method step 27, the information is written onto a chip card in order to then be used to grant a discount.

Claims

Expectations

1.) Method for the transmission of encrypted information, the encrypted information being fed into the data being transmitted on the transmission side, the encrypted information being decrypted and stored on the receiving side, characterized in that the decrypted information is used for granting a discount or cash payment ,

2.) Method according to claim 1, characterized in that the data are transmitted with digital radio signals.

^'0 3.) A process according to claim 1 or 2, characterized in that the encrypted information is decrypted at the receiving end by means of a chip card and stored.

5 4.) Method according to claim 1, 2 or 3, characterized in that the encrypted information is transmitted predominantly with advertising.

5.) Transmitter for carrying out the method according to one of claims 1, 2, or 4, characterized in that the transmitter has an encoder (2) for encrypting the information, a multiplexer (5) for feeding in the encrypted information and a modulator (6 ). 5

6.) Receiver for performing the method according to one of claims 1, 2 or 4, characterized in that the receiver has means for receiving the data and for decrypting the encrypted information.

7.) Receiver according to claim 3 and 6, characterized in that the receiver has a recording device (12) for a chip card (17).

8.) Chip card according to claim 3 and 7, characterized in that the chip card (17) has a memory (18) and is readable with a terminal.

9.) Terminal according to claim 8, characterized in that the terminal is designed as a cash register.