CN1440619A - Digital data interactive broadcasting cable modem terminal system - Google Patents
Digital data interactive broadcasting cable modem terminal system Download PDFInfo
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- CN1440619A CN1440619A CN01801657A CN01801657A CN1440619A CN 1440619 A CN1440619 A CN 1440619A CN 01801657 A CN01801657 A CN 01801657A CN 01801657 A CN01801657 A CN 01801657A CN 1440619 A CN1440619 A CN 1440619A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
- H04H20/78—CATV [Community Antenna Television] systems
- H04H20/79—CATV [Community Antenna Television] systems using downlink of the CATV systems, e.g. audio broadcast via CATV network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/70—Aspects of broadcast communication characterised in that receivers can be addressed
Abstract
The present invention teaches methods and systems for providing a cable modem termination system (CMTS) for enabling a data-on-demand (DOD) digital broadcast system to provide digital DOD services via a communications medium over one or more channels, the cable modem termination system comprising: a communications network interface for receiving at least one DOD service from the DOD digital broadcast system, wherein the DOD service is formatted as a stream of data blocks arranged in a schedule such that a first data block of the DOD service may be accessed at any selected time period; a uni-directional network interface for providing the stream of data blocks to a plurality of users, wherein th eusers may access the first data block at any time period and may access subsequent data blocks of the stream of data blocks thereby accessing the at least one DOD service.
Description
Related application
The application is the part continuation application, required the priority of Khoi Hoang: " selectivity lost efficacy and anti-duplicating " of submitting to August 20 calendar year 2001 with the patent application of lower banner, proxy records 60595-301001, " the control data program request client access " that submit to July 9 calendar year 2001, application number 09/902,503, " having reduced the data-on-demand broadcast transmitted matrix of free time and constant bandwidth " that submit to June 25 calendar year 2001, application number 09/892,017, " the preventing to forge STB " of submitting to June 25 calendar year 2001 by the agreement switching, application number 09/892,01 5, " universal STB structure and the control method " that submit to May 30 calendar year 2001, application number 09/870,879, " non-client's specified point multicast data broadcasting " (modification) submitted on May 31st, 2000, application number 09/584,832, " method of video-on-demand service is provided for broadcast system " that on November 10th, 2000 submitted to, application number 09/709,948 and " universal digital broadcast system and the method " submitted to April 24 calendar year 2001, application number 09/841,792, these eight incorporated by reference at this.
The invention summary
The present invention relates to video request program and digital broadcasting technology.Especially, the present invention has instructed a kind of digit broadcasting system Cable Modem Terminal System that can both use in unidirectional and bi-directional data program request (DOD) digital broadcast networks.
Background of invention
There are various mechanisms to can be used for by existing cable TV circuit and optical networking transmission data-on-demand (DOD) service.This system in conjunction with the existing cable television distribution system is called as the cable transmission data system.Owing to need provide mass data to independent user, so these methods all need costliness and complex apparatus.The existing cable net can transmit the data that surpass 30Mbps on single 6MHz physical transfer channel.For the DOD ISP, mass data is transferred to independent user through " front end " or data distribution center.Front end distributes single DOD service and receives the request of the DOD service of hope from independent user to the user by cable system.
Prior art Fig. 1 shows the schematic DOD digital broadcasting distribution system 10 according to the existing method that the DOD service is provided.DOD broadcasting server system 12 sends the DOD service through data network 16 forward end 14.Data network adopts the cable network of the host-host protocol of asynchronous transfer mode (ATM) typically, but also can be individually or comprise the Internet, transmission network, phone transmission net or private cable net in combination.Each DOD service is sent as linear data flow of time by DOD server system 12.
Cable Modem Terminal System (CMTS) 18 receives the DOD service that sends through CMTS network system interface 20.CMTS18 sends to selected cable modem receiver 22 through cable system 24 with selected DOD service then.Cable system has the existing cable TV transmission network of coaxial cable infrastructure typically, but also can use satellite, phone or optical networking.Alternatively, wide area network (WAN) or Local Area Network can replace cable system to use.The user can serve by the selected DOD of computer system 26 visits through being connected with cable modem 22.
User's request is the DOD service of the hope of machine 26 receptions as calculated.This request is sent to CMTS18 by cable modem 22 through the upstream channel of cable system 24.Alternatively, cable modem 22 can connect or directly is connected uplink data sending outside descending cable transmission path with CMTS through the connection of other technology through wireless connections, satellite.
CMTS18 is to DOD broadcast system 12 echo request.The DOD broadcast service system sends to CMTS18 with the DOD of all requests service then and distributes.CMTS serves with the DOD of individual address each download of addressing of asking the user then, and sends the DOD service.
Prior art Fig. 2 is the CMTS18 schematic block diagram according to the DOD distribution system shown in prior art Fig. 1.CMTS system 18 typically comprises: processor 50; Memory 52; Bi-directional communication interface 58 and up/descending bidirectional interface 60, each element connects mutually communicatedly by system bus 62.The address of all downstream cables modulator-demodulators 22 (Fig. 1) of storage in the address table (not shown) of processor 50 in memory 52.Processor receives the DOD service request through up/descending bidirectional interface 60 from independent user.These requests advance to DOD broadcast system 12 (Fig. 1) through bi-directional communication interface 58.
The DOD service of downloading from the DOD broadcast system sends to cable system 24 (Fig. 1) through up/descending bidirectional interface 60.The DOD service of each transmission is addressed and arrives appropriate users or customer group.
Prior art Fig. 3 shows the processing of being carried out by the Cable Modem Terminal System of prior art Fig. 2 (CMTS) 80, and being used for provides DOD service to the user.Handle 80 in step 82 beginning, the CMTS unit receives the request that selected DOD is served through the upstream channel of cable modem 22 and cable system 24 from the user.In step 84, DOD server 12 (Fig. 1) is given with DOD service request relaying in the CMTS unit then.In step 86, the CMTS unit receives the DOD service of request from the DOD server.In step 88, CMTS extracts request user's network address from address table, and this table comprises the network address of all cable modems in front end 14 (Fig. 1) downstream.Extracting station address is very complicated process, comprises many independent operations of not describing in detail in this explanation.
In step 90, the CMTS unit is served with the DOD of request user's network address addressing request.In step 92, the CMTS unit sends the DOD service of correct addressing to request user's cable modem through cable system at last.The DOD service that sends to the request user is become by linear set of streams of time.Must emphasize the very limited explanation of the complex operations that above-mentioned just CMTS carries out.
A problem of existing cable transmission data system is to want expensive complicated two-way CMTS system to distribute the DOD service to the terminal use.And existing two-way DOD service assignment net requires a large amount of two-way CMTS system, because each CMTS system can only support the cable modem receiver of limited quantity.In addition, the two-way CMTS system of the bigger quantity of two-way DOD server requirement is because two-way DOD distribution system needs sizable bandwidth.
What need is a kind of unidirectional CMTS system, One-to-All Broadcast DOD service assignment can be given the terminal use than the bigger quantity in existing two-way CMTS unit.Also need the simple cheap unidirectional CMTS in the existing two-way CMTS unit of a kind of ratio.Need a kind of unidirectional DOD broadcast service in addition, use less unidirectional CMTS system and use the transmission bandwidth that lacks than traditional bilateral system.
Summary of the invention
Some embodiment of the present invention has instructed the method and system that unidirectional cable modem terminal system (CMTS) is provided, and this CMTS can distribute the DOD service to the terminal use of greater number than existing two-way CMTS unit.In addition, the invention provides than simple cheap unidirectional CMTS unit, previous two-way CMTS unit.And, the invention provides and can on the bandwidth of DOD CMTS system, distribute more DOD service less than traditional double to more users.
The first embodiment of the present invention has been instructed a kind of Cable Modem Terminal System (CMTS), can make data-on-demand (DOD) digit broadcasting system provide digital DOD service through communication medium by one or more channels, Cable Modem Terminal System comprises: communications network interface, be used for receiving at least one DOD service from the DOD digit broadcasting system, wherein the DOD service is formatted as the data block stream of arranging in timetable, thereby first data block of DOD service can be accessed in any selected time period; The downlink network interface is used for data block stream is offered a plurality of users, wherein the user can be at any time section visit first data block and subsequent data blocks that can visit data piece stream, thereby visit at least one DOD service.
According to an alternative embodiment of the invention, at least one DOD service is to be formatted as at least one that a plurality of DOD of the data block stream of arranging in timetable serve, thereby first data block of any one of a plurality of DOD services can be accessed in any selected time period, and wherein the user can visit any one subsequent data blocks of a plurality of DOD service, thereby visits a plurality of DOD services any one.Also disclose a kind of Cable Modem Terminal System, wherein the downlink network interface communicates to connect through cable system and a plurality of set-top box.
Another aspect of the present invention has been instructed a kind of Cable Modem Terminal System (CMTS) method, be used for providing data-on-demand (DOD) digital service through communication medium by one or more channels, this Cable Modem Terminal System method comprises step: receive at least one DOD service from the DOD broadcast system, wherein the DOD service is formatted as the data block stream in the timetable of being arranged in, thereby first data block of DOD service can be accessed in any selected time period; Data block stream is sent to a plurality of users, wherein the user can be at any time section visit first data block and subsequent data blocks that can visit data piece stream, thereby visit at least one DOD service.
The accompanying drawing summary
Prior art Fig. 1 is the schematic block diagram that exemplary DOD digital broadcasting distribution system is shown;
Prior art Fig. 2 is according to the schematic block diagram at the Cable Modem Terminal System (CMTS) of the DOD distribution system shown in prior art Fig. 1;
Prior art Fig. 3 illustrates by the Cable Modem Terminal System (CMTS) of prior art Fig. 2 being used for of carrying out to provide DOD the process chart of service to the user;
Fig. 4 is the schematic block diagram that digital data interactive (DOD) broadcast system according to one embodiment of the invention is shown;
Fig. 5 is the schematic block diagram in conjunction with the DOD broadcasting server of unidirectional CMTS that illustrates according to one embodiment of the invention;
Fig. 6 is the schematic block diagram that illustrates according to DOD Cable Modem Terminal System of the present invention (CMTS) structure;
Fig. 7 is the process chart that is used to distribute the DOD service that illustrates by the CMTS system execution of Fig. 6; With
Fig. 8 is the signal part block diagram that the universal set-top box (STB) (STB) according to one embodiment of the invention is shown.
Detailed Description Of The Invention
In following embodiment describes in detail, to corresponding and carried out reference as the accompanying drawing of an embodiment part.Accompanying drawing shows the specific embodiment that the present invention can carry out by example.These embodiment are described in detail, and make those skilled in the art can implement the present invention, and should be appreciated that other embodiment also can implement, and can not break away from aim of the present invention and scope and carry out structure, logic and electronics and change and other modification.
Preferred embodiment has been instructed the method and system of the unidirectional cable modem terminal system (CMTS) that provides cheap, and this CMTS can distribute the DOD service to the terminal use of greater number than existing two-way CMTS unit.More particularly, the present invention has instructed the method and system that unidirectional cable modem terminal system (CMTS) is provided, this CMTS can make data-on-demand (DOD) digit broadcasting system provide digital DOD service by one or more channels through communication medium, Cable Modem Terminal System comprises: communication interface, be used for receiving at least one DOD service from the DOD digit broadcasting system, wherein the DOD service is formatted as the data block stream in the timetable of being arranged in, thereby first data block of DOD service can be accessed in any selected time period; The downlink network interface is used for data block stream is offered a plurality of users, wherein the user can be at any time section visit first data block and subsequent data blocks that can visit data piece stream, thereby visit at least one DOD service.
Fig. 4 is the schematic block diagram that digital data interactive (DOD) broadcast system 100 according to one embodiment of the invention is shown.DOD broadcast system 100 comprises: DOD broadcasting server 112; Broadcast data net 116; A plurality of front end units 114, each comprises CMTS network system interface 120 and CMTS unit 118; Cable system 124; A plurality of set-top box (STB) DOD receiver 122; With a plurality of audio frequency and videos (A/V) display unit 126.
DOD broadcasting server 112 sends all the available DOD services in one or more DOD data flow.In exemplary embodiment, the DOD broadcasting server also sends the cable TV signal except that the DOD service.The number of DOD data flow depends on the bandwidth (for example 6,6.5, or 8MHz) of cable channel, the compression standard/bit rate (for example MPEG-1 or MPEG-2) of QAM modulation (for example QAM64 or QAM256) and DOD data flow.Each DOD service sends with the multidata piece (TO-Tx) according to the arrangement of time arranged.Data block is sent out, and can begin to visit the T0 data block of any DOD service at any time and receive each subsequent data blocks that comprises selected DOD service continuously thereby receive STB122.Different with existing DOD broadcast system 10, the sequence of blocks of data of transmission is not the time linearity, and the data block of some selected DOD service than sending of other more frequent.
This broadcasting DOD service method Khoi Nhu Hoang with the patent application of lower banner in gone through: universal STB structure and the control method submitted to May 30 calendar year 2001, that submitted on May 31st, 2000 provides the system and method for video-on-demand service for broadcast system, application number 09/584,832, that submitted on November 10th, 2000 provides the method for video-on-demand service for broadcast system, application number 09/709,948, with universal digital broadcast system and the method submitted to April 24 calendar year 2001, application number 09/841,792, each is incorporated by reference at this.
Cable Modem Terminal System (CMTS) 112 receives this DOD data flow through CMTS network interface system 120.In an exemplary embodiment, CMTS network interface system 120 connects between CMTS118 and DOD broadcast system 112, so that the transmission of DOD data flow.
CMTS118 sends the DOD data flow through cable system 124 to each downstream machine top box (STB) DOD receiver 122.Each STB receiver 122 receives identical DOD data flow.
Fig. 5 shows the structure in conjunction with the DOD broadcasting server 112 of unidirectional CMTS unit according to one embodiment of the invention.By in DOD broadcasting server system in conjunction with the CMTS unit, eliminated separating the needs of front end.DOD server 112 comprises a plurality of channel servers 211, a plurality of unidirectional CMTS unit, a plurality of up converters 212 that each is corresponding with channel server 211, combiner amplifier 214, central control server 202 and central memory 204 connect as shown by data/address bus 206.As below will illustrating, the off-line operation of central control server 202 control channel servers 211, in case and channel server 211 be ready to just begin real-time Transmission.Central memory 204 is typically with the number format storing data files.But, also can use any suitable big capacity persistant data memory device.
In an exemplary embodiment, the data file of storage can be by the computer of any mandate through standard network interface (for example Ethernet connection) visit, the central control server 202 that for example is connected with network in the central memory 204.Channel server 211 provides the data file of extracting according to the instruction of central control server 202 from central memory 204.The arrangement of time of the extraction of numerical data and DOD digital data transfer is that " off-line " carried out, so that each channel server 211 of adequate preparation carries out real-time Data Transmission.Each channel server 211 is notified central control server 202 when being ready to DOD is provided, this moment, central control server 202 can be controlled channel server 211 beginning DOD transmission.
In a preferred embodiment, central control server 202 comprises the graphic user interface (not shown), makes the ISP pass through the time that drag-and-drop operation can specified data transmits.In addition, differentiate and control channel server 211 begins or stops by matrix according to transmitting for central control server 202.Provide the system and method for unidirectional DOD broadcasting matrix in the patent application of submitting to 31 days Mays in 2000 of Khoi Hoang, instruction to be arranged, title is for providing the system and method for video-on-demand service for broadcast system, application serial no 09/584,832, incorporated at this by reference.
Each channel server 211 is assigned to a channel, and is connected with unidirectional CMTS unit 218, and 218 send DOD information to each up converter 212.The output of each CMTS unit 218 is intermediate frequency (IF) signals of quadrature amplitude modulation (QAM) modulation, has and corresponding up converter 212 matched frequencies.The IF signal of QAM modulation depends on accepted standard.The present accepted standard of the U.S. is cable transmission data system interface standard (DOCSIS) standard, and it requires the IF frequency of about 43.75MHz.
Up converter 212 will the 218 IF conversion of signals that receive be radiofrequency signal (a RF signal) from the CMTS unit.The RF signal comprises frequency and bandwidth, depends on the channel and the accepted standard of expectation.For example, for the present substandard cable TV channel 80 of the U.S., the RF signal has the frequency of about 559.25MHz and the bandwidth of about 6MHz.
The output of up converter 212 is employed to combiner/amplifier 214.The RF signal of 214 amplifications of combiner/amplifier, adjusting and combined reception is exported to signal data network 116 (Fig. 4) then.
Fig. 6 shows the structure according to the unidirectional DOD Cable Modem Terminal System 118 of one embodiment of the invention.CMTS system 118 comprises: processor 150; Memory 152; Communications network interface 158 and unidirectional downstream interface 160, each element communicates to connect mutually through system bus 162.Send to cable system 124 (Fig. 4) from the DOD service that the DOD broadcast system receives through communications network interface 160 through data network 116 (Fig. 4).The entire stream of DOD service sends to each STB122 through cable system 124.Independent user can calling party STB122 any DOD service of being authorized to visit.
Different with former two-way CMTS18 (Fig. 1) unit, unidirectional CMTS118 of the present invention passes to all STB122 that are connected with cable system 124 with the DOD data downstream of all receptions simply.Because all available DOD services are sent to all STB122, so do not need CMTS118 to send single DOD service to independent user.Do not need to receive data from the terminal use yet.The basic function of processor 102 is to keep and the communicating by letter of DOD broadcast service system 112., there is not user's uplink communication to be received by the CMTS unit by CMTS118 address stored table yet.In an exemplary embodiment, all downstream user are also given with the digital cable TV signal relay of server system 112 in the CMTS unit.
The DOD data flow is received by communications network interface 158 and is sent to all STB122s with the form that is suitable for showing through cable system 124 by downlink network interface 160.In an exemplary embodiment, downlink network interface 160 sends the DOD data flow with the QAM modulation IF stream that is suitable for cable system transmission broadcasting.The not STB communication that receives by unidirectional CMTS system.In an exemplary embodiment, DOD traffic spike intensity is exaggerated and guarantees that signal arrives all downstream user clearly.
Unidirectional CMTS118 of the present invention can be than the previous more downstream user of system's support, because single DOD service is not sent to independent user.Can support more user also because the CMTS118 upstream request of the selected DOD service of process user not.
The CMTS that Fig. 7 shows according to the distribution DOD service of one embodiment of the invention handles 300.In step 302, CMTS118 (Fig. 4) receives through data network 116 and comprises one or more data flow that all can be served from the DOD that DOD broadcasting server system 112 (Fig. 1) obtains.The DOD data flow has been formatted as sequence of blocks of data, thereby any DOD service can be accessed in any zero-time.
In step 303, unidirectional CMTS is converted to the DOD data flow form that is fit to by receiving the STB122 visit.In an exemplary embodiment, the DOD data flow is formatted as QAM modulation IF frequency signal, for example QAM64 or QAM256.
In step 304, CMTS118 (Fig. 4), serves thereby each reception STB can visit any available DOD to the DOD data flow that all downstream STB122 send all receptions through cable system 124 (Fig. 4).In an exemplary embodiment, wherein DOD service is that the video of time linearity shows, film for example, the user can be in office when section is from beginning to visit this demonstration.For example, the user can begin to watch film " Star War " from film in time that Any user is selected.
Fig. 8 shows the universal STB 122 according to one embodiment of the invention.STB122 comprises qam demodulator 402, CPU404, local storage 408, buffer storage 410, the decoder 412 with video and audio decoder ability, figure overlay module 414, user interface 418, communication link 420 is with the fast data bus 422 that is connected with these devices as shown.The whole operation of CPU402 control universal STB 400, so that data are selected in response user's request, the data that decoding is selected, the data that decompress and decode, the data of reorganization decoding, in local storage 408 or buffer storage 410, store the data of decoding, and give decoder 412 data passes of storage.In an exemplary embodiment, local storage 408 comprises nonvolatile memory (for example hard drive) and safe storage (for example rom chip), and buffer storage 410 comprises volatile memory.
In one embodiment, qam demodulator 402 comprises reflector and receiver module, and following one or more modules: encrypting-decrypting module, forward error correction decoder/encoder, tuner control, descending and upstream processor, CPU and memory interface circuit.Qam demodulator 402 receives the IF signal of modulation, and sampling and restituted signal come restore data.
In an exemplary embodiment, when visit was allowed, at least one data block of decoder 412 decodings was transformed to data block in the image that shows on the output screen.Decoder 412 is supported subscriber's order, for example plays, and stops, and suspends, and stepping falls back, and advances etc.Decoder 412 offers output device 424 with the data of decoding and is used by the user.Output device 424 can be any suitable device, television set for example, computer, any appropriate display monitor, VCR etc.
Aforesaid example shows one exemplary embodiment more of the present invention, and for a person skilled in the art, other embodiment, variants and modifications are conspicuous.Therefore, the present invention will be not limited to specific embodiment discussed above, but be limited by following claim.
Claims (45)
1. a unidirectional cable modem terminal system (CMTS) comprising:
Receive the communication interface of transfer of data; With
The one-way interfaces of transfer of data is provided, and wherein said Cable Modem Terminal System does not need uplink communication.
2. unidirectional cable modem terminal system as claimed in claim 1 (CMTS), wherein said communication interface is further used for receiving at least one data file from digit broadcasting system, wherein said data file is formatted as the data block stream of arranging in timetable, thereby first data block of described data file can be accessed in any selected time period; And wherein said one-way interfaces is further used for described data block stream is offered a plurality of users, described first data block of wherein said user section visit at any time also can be visited the subsequent data blocks of described data block stream, thereby visits described at least one data file.
3. unidirectional cable modem terminal system as claimed in claim 2 (CMTS), wherein said at least one data file is at least one of a plurality of data files that is formatted as the data block stream of arranging in timetable, thereby first data block of any one of described a plurality of data files can be accessed in any selected time period, and wherein the user can visit any one subsequent data blocks of described a plurality of data files, thereby visits any one described a plurality of data file.
4. unidirectional cable modem terminal system as claimed in claim 2 (CMTS), the wherein said figured at least a portion that shows at least one described data block that comprises by at least one data file of user capture.
5. unidirectional cable modem terminal system as claimed in claim 3 (CMTS), wherein said downlink network interface communicates to connect through cable system and a plurality of set-top box.
6. unidirectional cable modem terminal system as claimed in claim 5 (CMTS), wherein said set-top box comprises sound-video display devices, is used to show at least a portion of at least one described data file.
7. unidirectional cable modem terminal system as claimed in claim 5 (CMTS), wherein said downlink network interface can not receive data from described a plurality of set-top box.
8. unidirectional cable modem terminal system as claimed in claim 3 (CMTS), wherein said Cable Modem Terminal System can not receive information from described user.
9. unidirectional cable modem terminal system as claimed in claim 5 (CMTS), wherein said Cable Modem Terminal System and described unidirectional connection of a plurality of set-top box.
10. unidirectional cable modem terminal system as claimed in claim 2 (CMTS), wherein said communication interface is used for receiving digitally encoded data, and wherein said unilateral network interface is used to send the digitally coded data of described reception.
11. unidirectional cable modem terminal system as claimed in claim 2 (CMTS), wherein said unilateral network interface provides described data block stream with the form of the signal of telecommunication.
12. unidirectional cable modem terminal system as claimed in claim 2 (CMTS), wherein said communication interface is used for receiving data from server system, and wherein at least one described a plurality of set-top box is used for communicating by letter with described server system through communication medium.
13. unidirectional cable modem terminal system as claimed in claim 12 (CMTS), wherein said communication medium comprises telephone network.
14. unidirectional cable modem terminal system as claimed in claim 12 (CMTS), wherein said communication medium comprises wireless network.
15. unidirectional cable modem terminal system as claimed in claim 12 (CMTS), wherein said communication medium comprises the Internet.
16. a Cable Modem Terminal System (CMTS) makes data-on-demand (DOD) digit broadcasting system provide digital DOD service through communication medium by one or more channels, described Cable Modem Terminal System comprises:
Communications network interface, be used for receiving at least one DOD service from described DOD digit broadcasting system, wherein said DOD service is formatted as the data block stream of arranging in timetable, thereby first data block of described DOD service can be accessed in any selected time period;
The unilateral network interface is used for described data block stream is offered a plurality of users, and described first data block of wherein said user section visit at any time also can be visited the subsequent data blocks of described data block stream, thereby visits described at least one DOD service.
17. Cable Modem Terminal System as claimed in claim 16, wherein said at least one DOD service is to be formatted as at least one that a plurality of DOD of the data block stream of arranging in timetable serve, thereby first data block of any one of described a plurality of DOD services can be accessed in any selected time period, and wherein the user can visit described any one the subsequent data blocks of described a plurality of DOD service, thereby visits any one described a plurality of DOD service.
18. Cable Modem Terminal System as claimed in claim 16, the wherein said service by at least one DOD of user capture comprises the figured at least a portion that shows at least one described data block.
19. Cable Modem Terminal System as claimed in claim 17, wherein said unilateral network interface communicates to connect through cable system and a plurality of set-top box.
20. Cable Modem Terminal System as claimed in claim 19, wherein said set-top box comprises sound-video display devices, is used to show at least a portion of at least one described DOD service.
21. Cable Modem Terminal System as claimed in claim 19, wherein said unilateral network interface can not receive data from described a plurality of set-top box.
22. Cable Modem Terminal System as claimed in claim 17, wherein said Cable Modem Terminal System can not receive information from described user.
23. Cable Modem Terminal System as claimed in claim 19, wherein said Cable Modem Terminal System and described unidirectional connection of a plurality of set-top box.
24. Cable Modem Terminal System as claimed in claim 16, wherein said communications network interface is used for receiving digitally encoded data, and wherein said unilateral network interface is used to send the digitally coded data of described reception.
25. Cable Modem Terminal System as claimed in claim 16, wherein said unilateral network interface provides described data block stream with the form of the signal of telecommunication.
26. a Cable Modem Terminal System (CMTS) method is used for providing data-on-demand (DOD) digital service by one or more channels through communication medium, described Cable Modem Terminal System method comprises step:
Receive at least one DOD service from the DOD broadcast system, wherein said DOD service is formatted as the data block stream of arranging in timetable, thereby first data block of described DOD service can be accessed in any selected time period;
Described data block stream is sent to a plurality of users, and described first data block of wherein said user section visit at any time also can be visited the subsequent data blocks of described data block stream, thereby visits described at least one DOD service.
27. method as claimed in claim 26, wherein said at least one DOD service is to be formatted as at least one that a plurality of DOD of the data block stream of arranging in timetable serve, thereby first data block of any one of described a plurality of DOD services can be accessed in any selected time period, and wherein the user can visit any one subsequent data blocks of described a plurality of DOD service, thereby visits any one described a plurality of DOD service.
28. method as claimed in claim 26, the wherein said service by at least one DOD of user capture comprises the figured at least a portion that shows at least one described data block.
29. method as claimed in claim 12, wherein said data block stream sends to a plurality of set-top box through cable system.
30. method as claimed in claim 29, wherein said set-top box comprises sound-video display devices, is used to show at least a portion of at least one described DOD service.
31. not comprising from described a plurality of set-top box, method as claimed in claim 29, wherein said method do not receive data.
32. method as claimed in claim 27, wherein said data block stream sends to described a plurality of set-top box with the form of the signal of telecommunication.
33. method as claimed in claim 32 further comprises and amplifies described data block stream.
34. method as claimed in claim 29, wherein said set-top box comprise the advanced television receiver with inner set-top box.
35. method as claimed in claim 29 further comprises receiving digitally encoded data and sends described digitally coded data through described cable system.
36. a Cable Modem Terminal System (CMTS) makes data-on-demand (DOD) digit broadcasting system provide digital DOD service through communication medium by one or more channels, described Cable Modem Terminal System comprises:
First device, be used for receiving at least one DOD service from described DOD digit broadcasting system, wherein said DOD service is formatted as the data block stream of arranging in timetable, thereby first data block of described DOD service can be accessed in any selected time period;
Second device is used for described data block stream is offered a plurality of users, and described first data block of wherein said user section visit at any time also can be visited the subsequent data blocks of described data block stream, thereby visits described at least one DOD service.
37. Cable Modem Terminal System as claimed in claim 36, wherein said at least one DOD service is to be formatted as at least one that a plurality of DOD of the data block stream of arranging in timetable serve, thereby first data block of any one of described a plurality of DOD services can be accessed in any selected time period, and wherein the user can visit any one subsequent data blocks of described a plurality of DOD service, thereby visits any one described a plurality of DOD service.
38. Cable Modem Terminal System as claimed in claim 36, the wherein said service by described at least one DOD of user capture comprises the figured at least a portion that shows at least one described data block.
39. Cable Modem Terminal System as claimed in claim 37, wherein said second device communicates to connect through cable system and a plurality of set-top box.
40. Cable Modem Terminal System as claimed in claim 39, wherein said set-top box comprises sound-video display devices, is used to show at least a portion of at least one described DOD service.
41. Cable Modem Terminal System as claimed in claim 39, wherein said second device can not receive data from described a plurality of set-top box.
42. Cable Modem Terminal System as claimed in claim 38, wherein said Cable Modem Terminal System can not receive information from described user.
43. Cable Modem Terminal System as claimed in claim 39, wherein said Cable Modem Terminal System and described unidirectional connection of a plurality of set-top box.
44. Cable Modem Terminal System as claimed in claim 36, wherein said first device is used for receiving digitally encoded data, and wherein said second device is used to send the digitally coded data of described reception.
45. Cable Modem Terminal System as claimed in claim 36, wherein said second device provides described data block stream with the form of the signal of telecommunication.
Applications Claiming Priority (16)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/709,948 US6725267B1 (en) | 2000-05-31 | 2000-11-10 | Prefetched data in a digital broadcast system |
| US09/709,948 | 2000-11-10 | ||
| US09/841,792 US20020023267A1 (en) | 2000-05-31 | 2001-04-24 | Universal digital broadcast system and methods |
| US09/841,792 | 2001-04-24 | ||
| US09/870,879 | 2001-05-30 | ||
| US09/870,879 US20020026646A1 (en) | 2001-04-24 | 2001-05-30 | Universal STB architectures and control methods |
| US09/892,017 US20020026501A1 (en) | 2000-05-31 | 2001-06-25 | Decreased idle time and constant bandwidth data-on-demand broadcast delivery matrices |
| US09/892,015 US20030208561A1 (en) | 2000-05-31 | 2001-06-25 | Counterfeit STB prevention through protocol switching |
| US09/892,015 | 2001-06-25 | ||
| US09/892,017 | 2001-06-25 | ||
| US09/902,503 | 2001-07-09 | ||
| US09/902,503 US20020049980A1 (en) | 2000-05-31 | 2001-07-09 | Controlling data-on-demand client access |
| US09/933,696 US20020059620A1 (en) | 2000-05-31 | 2001-08-20 | Selective inactivation and copy-protection |
| US09/933,696 | 2001-08-20 | ||
| US09/967,749 | 2001-09-27 | ||
| US09/967,749 US20020059635A1 (en) | 2000-05-31 | 2001-09-27 | Digital data-on-demand broadcast cable modem termination system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1440619A true CN1440619A (en) | 2003-09-03 |
| CN1218577C CN1218577C (en) | 2005-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01801657XA Expired - Fee Related CN1218577C (en) | 2000-11-10 | 2001-10-17 | Digital data interactive broadcasting cable modem terminal system |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1340378A2 (en) |
| JP (1) | JP2004535085A (en) |
| KR (1) | KR20030069171A (en) |
| CN (1) | CN1218577C (en) |
| AU (1) | AU2002215368A1 (en) |
| CA (1) | CA2428918A1 (en) |
| WO (1) | WO2002039627A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459573C (en) * | 2005-06-16 | 2009-02-04 | 华为技术有限公司 | Message transmitting method in cable modem terminal system |
| CN101867778A (en) * | 2010-04-22 | 2010-10-20 | 广州珠江数码集团有限公司 | Live broadcasting method for digital interactive television |
| CN1968059B (en) * | 2006-06-07 | 2012-05-23 | 华为技术有限公司 | Exchanger, audio broadcasting system and broadcasting method in audio broadcasting system |
| US8705567B2 (en) | 2004-12-10 | 2014-04-22 | Broadcom Corporation | Upstream channel bonding using legacy maps in a cable communications system |
| US8711878B2 (en) | 2004-12-10 | 2014-04-29 | Broadcom Corporation | Upstream channel bonding in a cable communications system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5870134A (en) * | 1997-03-04 | 1999-02-09 | Com21, Inc. | CATV network and cable modem system having a wireless return path |
| US5978381A (en) * | 1997-06-06 | 1999-11-02 | Webtv Networks, Inc. | Transmitting high bandwidth network content on a low bandwidth communications channel during off peak hours |
| US6157965A (en) * | 1998-02-27 | 2000-12-05 | Intel Corporation | System and method for binding a virtual device driver to a network driver interface |
| US6301667B1 (en) * | 1998-10-08 | 2001-10-09 | At&T Corporation | Method and system for secure network management of high-speed internet access CPE |
-
2001
- 2001-10-17 JP JP2002541830A patent/JP2004535085A/en active Pending
- 2001-10-17 AU AU2002215368A patent/AU2002215368A1/en not_active Abandoned
- 2001-10-17 WO PCT/US2001/032315 patent/WO2002039627A2/en active Search and Examination
- 2001-10-17 EP EP01983983A patent/EP1340378A2/en not_active Withdrawn
- 2001-10-17 KR KR10-2003-7006378A patent/KR20030069171A/en not_active Application Discontinuation
- 2001-10-17 CN CN01801657XA patent/CN1218577C/en not_active Expired - Fee Related
- 2001-10-17 CA CA002428918A patent/CA2428918A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8705567B2 (en) | 2004-12-10 | 2014-04-22 | Broadcom Corporation | Upstream channel bonding using legacy maps in a cable communications system |
| US8711878B2 (en) | 2004-12-10 | 2014-04-29 | Broadcom Corporation | Upstream channel bonding in a cable communications system |
| US8908716B2 (en) | 2004-12-10 | 2014-12-09 | Broadcom Corporation | Upstream channel bonding in a cable communications system |
| CN100459573C (en) * | 2005-06-16 | 2009-02-04 | 华为技术有限公司 | Message transmitting method in cable modem terminal system |
| CN1968059B (en) * | 2006-06-07 | 2012-05-23 | 华为技术有限公司 | Exchanger, audio broadcasting system and broadcasting method in audio broadcasting system |
| CN101867778A (en) * | 2010-04-22 | 2010-10-20 | 广州珠江数码集团有限公司 | Live broadcasting method for digital interactive television |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002039627A2 (en) | 2002-05-16 |
| WO2002039627A3 (en) | 2003-05-01 |
| CA2428918A1 (en) | 2002-05-16 |
| KR20030069171A (en) | 2003-08-25 |
| CN1218577C (en) | 2005-09-07 |
| EP1340378A2 (en) | 2003-09-03 |
| JP2004535085A (en) | 2004-11-18 |
| AU2002215368A1 (en) | 2002-05-21 |
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