CN1751455A - System and method for controlling broadcast multimedia using plural wireless network connections - Google Patents
System and method for controlling broadcast multimedia using plural wireless network connections Download PDFInfo
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Abstract
Digital multimedia is broadcast to wireless receivers on a unidirectional wireless broadcast channel, while control data necessary for presentation of the multimedia is provided on a bidirectional, point-to-point wireless link.
Description
The cross reference of related application
The application requires the priority of the U.S. Provisional Patent Application sequence number 60/442,007 of submission on January 22nd, 2003, is incorporated herein it all as a reference.
Technical field
The present invention relates generally to computer-based communication system.
Background technology
For example the digital multimedia of video and music can be transmitted wirelessly for example wireless telephonic mobile receiver, so that user's play multimedia of described mobile receiver.Described data typically can be broadcasted.
Except described multi-medium data self, also must provide auxiliary control data to receiver.This control data comprises and for example is used for deciphering key that described multi-medium data is decrypted, in order to protect the copyright in the medium this multi-medium data is encrypted.Equally, this control data can comprise and relates to the information that user's subscribed broadcast, user are registered broadcast service, charge information and access control data.
The current method that being used for the radio broadcasting of digital multimedia provides is that described control data is sent together with described multi-medium data.As recognizing here, this has reduced the communication bandwidth amount that can be used for carrying described multi-medium data, and it tends to super bandwidth.In addition, the present invention recognizes, is not enough to easily described content is decrypted by other even only have this key, for example can cause safety problem together with being sent the deciphering key by the multi-medium data that key is decrypted.The undelegated listener-in who intercepts described encrypted content has also received at least some for this content Useful Information of decoding, and therefore more approaches to steal described content.
Summary of the invention
Communication system comprises the broadcasting center, and this broadcasting center is by radio broadcasting chain road direction wireless receiver broadcast multimedia streams wirelessly.The control data that is associated with media stream on the bidirectional wireless link is provided for described receiver.
In a preferred embodiment, described bidirectional wireless link can be CDMA link, 802.11 links or Bluetooth link.This bidirectional wireless link also can be the point to point wireless communication link.
In the exemplary embodiment, described control data can comprise and is used for encryption key pair that described media stream is decrypted.This control data also can comprise the data that are associated with the order MBMS service, the application that is associated with the data of registering and is used for play multimedia data on multimedia broadcasting network.In addition, this control data may comprise charge information, about the data of user preferences with about relating to the data of the service class that described media stream is provided.
In particularly preferred embodiment, the multimedia server that comprises data copyright management (DRM, digitalrights management) server is provided, and has used it for described media stream is encrypted.Digital broadcasting multimedia (DBM, digital broadcast multimedia) controller also is provided, and has used it for from described DRM server and obtain encryption key pair and this key is sent to authorized users.Described DBM controller also can use the network control center (NCC, networkcontrol center) key to be sent to the receiver of authorized users.The described network control center communicates by letter on bidirectional wireless link with described wireless receiver.Application server can be associated to described DBM controller, and being used for provides application to the receiver that relates to play multimedia stream.Application server also can be associated to the described network control center, and being used for provides additional application to the receiver that relates to play multimedia stream.Some of above-mentioned server or all can be separated from one another or be integrated in together.
In another aspect, be used for Wireless Telecom Equipment is provided the method for media stream, be included in the described media stream of broadcasting on the wireless broadcast channel, be used on described equipment, showing the necessary control data of this media stream by the bidirectional wireless link transmission.
In another aspect, the wireless client station that can utilize at least two communication links to communicate comprises processor, and this processor is receiving digital multimedia stream and receive control data on bidirectional wireless link on the broadcast channel.This processor uses described control data, to realize the demonstration of described media stream on display.
In another aspect, be used for Wireless Telecom Equipment is provided the system of media stream to comprise to be used for the device of the described media stream of broadcasting on wireless broadcast channel.This system also comprises and is used for transmitting the device that is used for showing the necessary control data of described media stream on described equipment on the bidirectional wireless link.
Description of drawings
With reference to the accompanying drawings, can understand the identical part of reference number representative of the present invention about its structure and both details of operation, wherein identical better, and wherein:
Fig. 1 is the block diagram of current system;
Fig. 2 is the flow chart of active procedure, and being used for provides broadcast multimedia streams on the broadcasting unidirectional channel, and provides control data and encryption key pair on two-way point-to-point link;
Fig. 3 is the flow chart that the logic of control information transmission has been described; With
Fig. 4 is the flow chart of charging logic.
Embodiment
At first with reference to figure 1, the system that the common usefulness 10 that illustrates is indicated comprises radio network operation center (NOC) 12, it utilizes preferred one-way channel 14, and digital multimedia content is carried out radio broadcasting with the form of media stream to radio mobile station 16 (for the clear single mobile station 16 that only shows).Described travelling carriage 16 also can receive program timing and code information by the paging and/or the synchronizing channel of described broadcast channel 14, with trace routine time slot (for the structure based on DO) or Walsh channel (for the structure based on CDMA).
Described media stream may come from and described NOC 12 communications or otherwise one or more sources 18 of being associated with this NOC 12.Described stream can be sent to computer implemented multimedia server 20, if wish, then this server can comprise digital copyright management separation or integrated (DRM) server, to utilize encryption key pair to come described stream is encrypted according to the known digital rights management principles of prior art, described encryption key pair is produced by described server 20, perhaps provide by two-way link by digital broadcasting medium (DBM, digital broadcast media) controller 22 or other source.Described multimedia server 20 thereby can comprise digital copyright management center integrated or that separate, this digital copyright management center provides the encryption key pair that is suitable for strengthening the digital publishing rights strategy.
Described preferred DMB controller 22 can comprise broadcast application 22a, BREW server for example, and it provides software and renewal by two-way link discussed below to described travelling carriage 16.Described preferred non-limiting DBM controller 22 also can comprise broadcast customer manager 22b, the data that it exchanges about control, service order and charging by two-way link discussed below and described travelling carriage 16.If wish that then described broadcast application 22a can physically separate with described DBM controller 22 with broadcast customer manager 22b, however still can communicate with this DBM controller 22.
One-to-All Broadcast wireless transceiver system 24 by described NOC 12 transmits described media stream.This transceiver system 24 can unrestrictedly use CDMA principle, GSM principle, perhaps comprises other wireless principles of wideband CDMA (WCDMA), cdma2000 (for example cdma2000 1x or 3x air-interface standard), TDMA or TD-SCDMA and OFDM.
As shown in the figure, described travelling carriage 16 comprises processor 26, and it drives audio frequency, video or audio/video (A/V) display 28, is used for showing on this display 28 described media stream.This travelling carriage 16 also comprises at least one and two (or a plurality of) communication control processor systems 30,32 in some cases.First system 30 is configured to described NOC 12 and communicates.On the contrary, second system 32 is configured to by two-way point-to-point link and communicates.When using a more than receiver, if expectation, two receivers can be implemented on the same computer chip.
Fig. 1 also shows, and in a non-limiting example, the network control center (NCC) 34 communicates with described travelling carriage 16 by two-way point-to-point link 36.According to brief disclosed principle, NCC 34 also communicates with NOC 12, with between described NOC 12 and described travelling carriage 16 except described One-to-All Broadcast link 14, set up second path be used for data communication effectively.In optional embodiment, second communication path between described travelling carriage 16 and DBM controller 22 can be by double-direction radio point-to-point link that needn't be by NCC, but it can be for example directly to the Bluetooth link or 802.11 links of described DBM controller 22.
Described NCC 34 can be the NCC of commercial wireless telephone company.Get rid of to use when the Principle of Communication of described link 36 and be same as when communicating the communication control processor of employed travelling carriage 16 with NOC 12, second receiver 32 of described travelling carriage 16 communicates with described NCC 34.Described two-way link 36 can be for example based on CDMA or based on the GSM link.
When using NCC 34, this NCC 34 can comprise double-direction radio transceiver system 38, be used for according to following public content to and carry out two-way communication from the data of described travelling carriage 16.NCC controller/router four 0 also can be included among the described NCC 34, be used for receiving encryption key pair for example and comprising the out of Memory of software and software upgrading, thereby and send these information to described travelling carriage 16 and for example the ciphering multimedia stream that receives on described broadcast channel 14 is deciphered from described DBM controller 22.Discussed below, can between described DBM controller 22 and NCC controller 40, be exchanged from other control data of described DBM controller 22.Although can use other link, this NCC controller 40 communicated with also preferably safe in utilization connection of DBM controller 22, for example the VPN (virtual private network) in the Internet connection (VPN).
Therefore, can know now that " control data " can comprise encryption key pair, and typically on broadcast channel 14, supporting multimedia commerce that the information of necessary other type is provided.This can comprise the data that are associated with the order MBMS service and be associated with the data of registering on multimedia broadcasting network.Described control data also can comprise software application, for example is used to the application that BREW uses or BREW supplies with of playing described multi-medium data or watching available title.In addition, the control data that can be between described travelling carriage 16 and DBM controller 22 be exchanged by for example NCC 34 can comprise service or product ordering information and about the data of user preferences and about relating to the data of the service class that described media stream is provided.Necessary data also can be exchanged between described DBM controller 22 and described NCC controller 40 for chargeing.In addition, the user of travelling carriage can be by described two-way link order products and service.Described control data also can comprise and is used for data that described media stream is deinterleaved (de-interleaving), decompresses and decode, and be used for indexing to carry out the data that channel is selected and followed the tracks of at described media stream.
For example, the user of described travelling carriage 16 can use described two-way link 36 to register on described radio network.This user also can order the various MBMS service that can be provided on described broadcast channel 14, and can point out for the hobby of service class (for example only basic layer, basic layer add enhancement layer etc.) and correspondingly chargeed.In addition, described user can receive the tabulation of available programs titles by described link 36, and selects the title of the media stream that will receive on described broadcast channel 14.
Can understand process of the present invention with reference to figure 2, it can use a computer and carry out.In piece 42 beginnings, by the DRM center that for example is associated with described multimedia server 20, perhaps by described DBM controller 22, the cipher key principle known according to prior art produces encryption key pair.Can use the standard copyright descriptive language of XrML, ODRL etc. for example to describe individual consumer's permission copyright.For example can use Advanced Encryption Standard (AES, Advanced Encryption Standard) or other encryption method to produce key and media stream is encrypted.At piece 44, described key is provided for the multimedia server 20 of described NOC12, and this key is used to ciphering multimedia stream to broadcast these media streams at piece 48 at piece 46.
Fig. 2 shows above-mentioned logic concurrently, in case produced described key at piece 42, just can use described DBM controller 22 on the two-way link 36 by described NCC 34 this key to be offered described travelling carriage.Described travelling carriage 16 need to determine one or more program keys to be used for one or more media streams are decoded, and connects by the data on the two-way link 36 of NCC 34 in piece 49 requests.Described travelling carriage 16 at piece 52 from the described key of described DRM server requests.At piece 53, verify described M.S. request (it receives the right of this key) by described DRM server.Suppose that this travelling carriage is authorized to receive described key, then send this key from described DBM controller 22 to described NCC controller/router four 0 at piece 50.Therefrom, described key uses described two-way link 36 to be sent to travelling carriage 16 at piece 54, described two-way link 36 is directly from (for example when described link 36 was bluetooth or 802.001 links, it was directly connected to described travelling carriage 16 with described controller 22) of described DBM controller 22 or by described NCC 34.At piece 56, described travelling carriage uses the key that is received on described two-way point-to-point link 36, and the content that receives on described broadcast channel 14 is decrypted.
With reference now to Fig. 3,, at piece 58, can provide above-mentioned some control information, so that described travelling carriage 16 is selected by two-way link 36.For example, control information can be provided, so that the user can suitably select the service option expected and send back this selection (for example by NCC 34) at piece 60 to described DBM controller 22, as mentioned above, described control information relates to the user's registration that allows travelling carriage 16 or selects specific program, or order, perhaps broadcast fidelity option etc.As response, by described broadcast customer manager 22b stored information, and at piece 61, any parameter that will be used for decoding multimedia stream by two-way link 36 sends back described M.S.16.At piece 62, the media stream that is associated with described control information exchange is sent to described travelling carriage 16 and by this travelling carriage it is decoded.
Similarly, Fig. 4 shows charge information and can be exchanged by described two-way link 36.In piece 64 beginnings, at described NOC 12, collecting from described DBM controller 22 may be by the user-selected control information of travelling carriage 16, and this control information relates to for example specific program, order or broadcasting fidelity option.In some implementations, described control information can be kept by described NCC 34 temporarily, and in this case, this control information is collected from temporary storage.At piece 66, also collected the information that relates to the service that in fact successfully offers travelling carriage 16.At piece 68, use in piece 64 and 66 information of collecting, the client user of described travelling carriage 16 is chargeed.
Though this illustrate and a plurality of wireless networks of the use of describing in detail the specific system and method that connects the control broadcast multimedia can reach above-mentioned target of the present invention fully, yet be to be understood that, it is a currently preferred embodiment of the present invention, and thereby be the extensively representative of the purport of consideration of the present invention, scope of the present invention comprises to those skilled in the art very significantly other embodiment fully, and therefore except as by the appended claims, scope of the present invention is not subjected to any restriction.Unless the unit explicit state of representing with odd number otherwise do not mean that " and only " wherein, but mean " one or more ".All structures and equivalent function of the unit of those of ordinary skills' above preferred embodiment known or that will know subsequently is incorporated herein by reference especially at this, and is included in this claim.In addition, equipment or method needn't solve each problem to be solved by this invention, because it is included in this claim.And no matter whether clearly narrated described unit, element or method step in the claim, it is public not having unit, element or method step in the disclosure.Here will be according to the 6th section the regulation of 35U.S.C. ' 112 and is explained in the unit that does not have a claim, unless use " be used for ... device " this statement described described unit clearly, or under the situation of claim to a method, described unit is described to " step " rather than " action ".
Claims (50)
1. communication system comprises:
At least one broadcasting center, it wirelessly broadcasts at least one media stream; With at least one wireless receiver, it receives described stream by the radio broadcasting link, and this receiver is provided with the control data that is associated with the media stream on the bidirectional wireless link.
2. according to the system of claim 1, wherein, described bidirectional wireless link is not associated with described broadcasting link.
3. according to the system of claim 1, wherein, it is unidirectional that described broadcasting connects, and characterizes its characteristic by at least one of CDMA principle, GSM principle and OFDM principle.
4. according to the system of claim 1, wherein, described bidirectional wireless link is selected from the group that comprises CDMA link, GSM link, 802.11 links and Bluetooth link.
5. according to the system of claim 1, wherein, described bidirectional wireless link is the point to point wireless communication link.
6. according to the system of claim 1, wherein, described receiver is a mobile communication equipment, and it has at least one display and is used for showing described multi-medium data.
7. according to the system of claim 1, wherein, described receiver is a mobile communication equipment, and it has at least one loud speaker and is used for showing the multimedia audio data.
8. according to the system of claim 1, wherein, described control data comprises at least one of following content: at least one be used to decipher described media stream key, be associated with the data of ordering MBMS service, be associated with the data on multimedia broadcasting network, registered, application that at least one is used for described multi-medium data is decoded, charge information, about the data of user preferences, and about relating to the data of the service class that described media stream is provided.
9. according to the system of claim 1, wherein, come order service by described two-way link.
10. according to the system of claim 1, wherein, come order products by described two-way link.
11. according to the system of claim 1, also comprise at least one digital broadcasting multimedia (DBM) controller, it is used for described media stream is encrypted, encoded and/or assembles at least.
12. according to the system of claim 1, wherein, described control data comprises and is used to deinterleave, decompress and the data of the described media stream of decoding.
13. according to the system of claim 1, wherein, described control data comprises and is used for indexing to carry out the data that channel is selected and followed the tracks of at described media stream.
14. according to the system of claim 11, also comprise at least one network control center, it is communicated by letter with described DBM controller to receive key from it at least, the described network control center communicates by letter with described wireless receiver by described bidirectional wireless link.
15. according to the system of claim 14, also comprise the NCC controller that at least one is associated with the described network control center, to provide the application that relates to play multimedia stream to receiver at least.
16. according to the system of claim 14, also comprise the network operation controller (NOC) that at least one is associated with described radio network operation center, relate to the application of playing by the media stream of bidirectional wireless link to provide to receiver at least.
17. a method that is used for providing to Wireless Telecom Equipment media stream comprises:
Broadcast described media stream by wireless broadcast channel; With
By bidirectional wireless link, transmission is used for showing the necessary control data of described media stream on described equipment.
18., wherein, transmit at least some control datas to described wireless device according to the method for claim 17.
19., wherein, transmit at least some control datas from described wireless device according to the method for claim 17.
20. according to the method for claim 17, wherein, described bidirectional wireless link is not associated with described broadcast channel.
21. according to the method for claim 17, wherein, described broadcast channel is unidirectional.
22. according to the method for claim 21, wherein, described broadcasting link is to characterize its characteristic by at least one of CDMA principle, GSM principle and OFDM principle.
23. according to the method for claim 17, wherein, described bidirectional wireless link is at least one of CDMA link, GSM link and OFDM link.
24. according to the method for claim 17, wherein, described bidirectional wireless link is at least one of 802.11 links, Bluetooth link, satellite link and point to point wireless communication link.
25. according to the method for claim 17, wherein, described receiver is a mobile communication equipment, this equipment has at least one display and is used for showing that described media stream and at least one loud speaker are used for showing the multimedia audio data.
26. according to the method for claim 17, wherein, described control data comprises that at least one is used to decipher the key of described media stream.
27. according to the method for claim 17, wherein, described control data comprises the data that are associated with the order MBMS service.
28. method according to claim 17, wherein, described control data comprises at least one of following content: be associated with the data registered, application that at least one is used to play described multi-medium data, charge information and about the data of user preferences on multimedia broadcasting network.
29. according to the method for claim 17, wherein, described control data comprises about relating to the data of the service class that described media stream is provided.
30. according to the method for claim 17, wherein, described media stream is numeral and encrypted.
31. according to the method for claim 17, wherein, described control data comprises the data that are used to deinterleave, encrypt the decompression and the described media stream of decoding.
32. according to the method for claim 17, wherein, described control data comprises and is used for indexing to carry out the data that channel is selected and followed the tracks of at described media stream.
33., comprise at least one by described two-way link order service and product according to the method for claim 17.
34. the wireless client station that can use at least two communication links to communicate comprises:
At least one processor, its digital multimedia that is received on the broadcast channel to be received stream and the control data that on bidirectional wireless link, is received; Wherein, this processor uses described control data, makes it possible to the described media stream of performance on display.
35. according to the client stations of claim 34, wherein, described bidirectional wireless link is not associated with described broadcast channel.
36. according to the client stations of claim 34, wherein, described broadcast channel is unidirectional.
37. according to the client stations of claim 34, wherein, described bidirectional wireless link is at least one of CDMA link, 802.11 links, GSM link, satellite link and Bluetooth link.
38. according to the client stations of claim 34, wherein, described bidirectional wireless link is the point to point wireless communication link.
39. according to the client stations of claim 34, wherein, described control data comprises that at least one is used to decipher the key of described media stream.
40. according to the client stations of claim 34, wherein, described control data comprises the data that are associated with the order MBMS service and/or be associated with the data of registering on multimedia broadcasting network.
41. according to the client stations of claim 34, wherein, described control data comprises that at least one is used to play the application of described multi-medium data.
42. according to the client stations of claim 34, wherein, described control data comprises about the charge information data of user preferences and/or about relating to the data of the service class that described media stream is provided.
43. according to the client stations of claim 34, wherein, described media stream is numeral and encrypted.
44. according to the client stations of claim 34, wherein, described control data comprises and is used to deinterleave, decipher, decompress and the data of the described media stream of decoding.
45. according to the client stations of claim 34, wherein, described control data comprises and is used for indexing to carry out the data that channel is selected and followed the tracks of at described media stream.
46., wherein, can pass through at least one of described two-way link order service and product according to the client stations of claim 34.
47. a system that is used for providing to Wireless Telecom Equipment media stream comprises:
Be used for broadcasting the device of described media stream by wireless broadcast channel; With the device that is used for by the bidirectional wireless link communications of control data, described control data is essential for show described media stream on described equipment for.
48., also comprise being used for the device that how described media stream is encrypted according to the system of claim 47.
49. according to the system of claim 48, be used for communicating with at least from its device that receives key, be used for the device that communicates by described bidirectional wireless link and described wireless receiver with described encryption device.
50. according to the system of claim 49, also comprise with described being used for the device that communicating devices communicates, so that the application that relates to play multimedia stream to be provided to receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210023638.8A CN102594478B (en) | 2003-01-22 | 2004-01-22 | The system and method for controlling broadcast multimedia using multiple wireless network connections |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44200703P | 2003-01-22 | 2003-01-22 | |
| US60/442,007 | 2003-01-22 | ||
| US10/748,603 | 2003-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210023638.8A Division CN102594478B (en) | 2003-01-22 | 2004-01-22 | The system and method for controlling broadcast multimedia using multiple wireless network connections |
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| CN1751455A true CN1751455A (en) | 2006-03-22 |
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| CN 200480004398 Pending CN1751455A (en) | 2003-01-22 | 2004-01-22 | System and method for controlling broadcast multimedia using plural wireless network connections |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103026726A (en) * | 2010-07-28 | 2013-04-03 | 汤姆森特许公司 | Method, apparatus and system for using backchannels for controlling and configuring displays and peripheral devices |
| CN101267590B (en) * | 2007-03-14 | 2013-07-31 | 中国移动通信集团公司 | Service unsubscription method and system, mobile terminal, card and service server |
| CN113473212A (en) * | 2021-09-03 | 2021-10-01 | 深圳佳力拓科技有限公司 | Digital television display method with both unidirectional broadcast network and bidirectional communication network |
-
2004
- 2004-01-22 CN CN 200480004398 patent/CN1751455A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267590B (en) * | 2007-03-14 | 2013-07-31 | 中国移动通信集团公司 | Service unsubscription method and system, mobile terminal, card and service server |
| CN103026726A (en) * | 2010-07-28 | 2013-04-03 | 汤姆森特许公司 | Method, apparatus and system for using backchannels for controlling and configuring displays and peripheral devices |
| CN113473212A (en) * | 2021-09-03 | 2021-10-01 | 深圳佳力拓科技有限公司 | Digital television display method with both unidirectional broadcast network and bidirectional communication network |
| CN113473212B (en) * | 2021-09-03 | 2021-10-29 | 深圳佳力拓科技有限公司 | Digital television display method with both unidirectional broadcast network and bidirectional communication network |
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