CN101355687A - Apparatus for deciphering and descrambling receiving terminal of ground wireless digital television - Google Patents
Apparatus for deciphering and descrambling receiving terminal of ground wireless digital television Download PDFInfo
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- CN101355687A CN101355687A CNA2008100427181A CN200810042718A CN101355687A CN 101355687 A CN101355687 A CN 101355687A CN A2008100427181 A CNA2008100427181 A CN A2008100427181A CN 200810042718 A CN200810042718 A CN 200810042718A CN 101355687 A CN101355687 A CN 101355687A
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Abstract
The invention provides a decrypting descrambling device for a ground wireless digital television receiving terminal, by which a terminal can receive and play encrypting scrambling programs. The technical proposal of the invention is as follows: the device comprise a condition receiving card read-write interface module providing the read-write of the condition receiving card, a digital signal receiving module demodulating modulated digital signals to encrypted scrambled digital television signals, a de-multiplexing module, an encrypting module, a descrambling module, a decoding module and a playing module, wherein the digital television signals are processed by a BDA frame on a driving layer to obtain the TS flow, and the de-multiplexing module de-multiplexes the TS flow to obtain the scrambling video-audio flow and the corresponding authorization information; the encrypting module receives the authorization information, based on which a control word is obtained from the condition receiving card; the descrambling module descrambles the scrambling video-audio flow according to the control word; the decoding module converts the descrambling video-audio flow to the playable video-audio flow according to the DirectShow frame on a software layer; and the playing module plays the video-audio flow. The invention is applied to the ground wireless digital television field.
Description
Technical field
The present invention relates to a kind of apparatus for deciphering and descrambling of receiving terminal of Digital Television, relate in particular to a kind of apparatus for deciphering and descrambling of the receiving terminal to the ground wireless digital TV-set.
Background technology
At digital TV field, in order to satisfy the operation requirement of operator, ensure the program source copyright, need program stream to be carried out cryptographic operation at front end, concerning present terminal receiving equipment, need realization condition to receive like this.This realizes in top box of digital machine STB field, but does not realize on PC and hand-held mobile terminal.
Various portable digital television receiving equipments are arranged in the market, as support the USBDongle product of various standards.The STB of CATV terminal develops comparative maturity, as Digital Television necessary conditions receiving system CA, plays crucial effects in the operation of Digital Television with in safeguarding.Compare with the cable digital TV maturity, the terrestrial wireless Digital Television belongs at the early-stage, and corresponding receiving terminal also just rises, but all can only satisfy the reception and the broadcast of simple clear stream, and is then at a loss as to what to do for the ciphered program that follow-up operator is about to provide.Therefore at the terrestrial wireless digital TV field, need on the terminal receiving equipment, provide corresponding condition to receive (CA, Conditional Access) and support.
Summary of the invention
The objective of the invention is to address the above problem, a kind of apparatus for deciphering and descrambling of receiving terminal of terrestrial wireless Digital Television is provided, make terminal to receive and play the programme signal of encrypting scrambling, and cooperate front end system that various value-added service supports are provided.
Technical scheme of the present invention is: the present invention has disclosed a kind of apparatus for deciphering and descrambling of receiving terminal of terrestrial wireless Digital Television, the function of condition reception is provided for the receiving terminal of terrestrial wireless Digital Television, this Microsoft's broadcasting of installing in the integrated DirectShow of the Microsoft application programming interface drives System Framework to realize that this device comprises under this System Framework to reception, decoding and the broadcast of TS stream:
Condition receiving card read-write interface module provides the read-write operation to condition receiving card;
The digital signal receiver module is reduced into the modulated digital signal demodulation that receives the digital television signal of encrypting scrambling;
Demultiplexing module, this digital television signal are followed the processing that Microsoft broadcasting on the Drive Layer drives System Framework and are obtained TS stream, obtain the video-voice frequency flow and the corresponding authorization message of scrambling after will this TS stream demultiplexing;
Deciphering module receives the authorization message that this demultiplexing module obtains, and passes through this condition receiving card read-write interface module controlled word from this condition receiving card according to this authorization message;
Descrambling module, this control word that obtains by this condition receiving card read-write interface module is carried out descrambling according to this control word to the video-voice frequency flow of this scrambling;
Decoder module is followed the DirectShow of the Microsoft framework on the software layer, and the video-voice frequency flow behind the descrambling that this descrambling module is obtained converts the video-voice frequency flow that can play to;
Playing module is play the video-voice frequency flow that this decoder module obtains.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, this condition receiving card read-write interface module is embedded in and forms incorporate structure in this stream receiver module.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, this incorporate structure is connected by USB interface with this receiving terminal.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, the structure that this condition receiving card read-write interface module and this stream receiver module are separate types.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, this condition receiving card read-write interface module of separate type is connected with this receiving terminal by USB interface respectively with this stream receiver module.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, this device also comprises the system platform support module, the coupling of integrated operation system and calling function, this device the whole software layer encapsulated, so that can adapt to different operating system platforms.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, this authorization message comprises ECM, EMM, PID and a plurality of tables of data.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, this device also comprises:
Application interface module provides the interface of various value-added services according to the information in the TS stream.
The apparatus for deciphering and descrambling of the receiving terminal of above-mentioned terrestrial wireless Digital Television, wherein, this decoder module is supported Mpeg2, is H.264 decoded with AVS.
The present invention contrasts prior art following beneficial effect: the present invention proposes solution from the principle and the framework of CA system authorization identifying procedure, carry out the function of encrypted digital medium scrambling and the DirectShow of Microsoft integrated, read-write interface according to the CA card on the hardware, utilize the decryption engine on the CA card, and the playout software that cooperates the terminal descrambling and the broadcast of flowing, realize that terminal equipment receives the condition of programme signal.
Description of drawings
Fig. 1 is the schematic diagram of first embodiment of apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television of the present invention.
Fig. 2 is the schematic diagram of second embodiment of apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
First embodiment
Fig. 1 shows the principle of first embodiment of apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television of the present invention.See also Fig. 1, the function that the apparatus for deciphering and descrambling of present embodiment provides condition to receive for the receiving terminal of terrestrial wireless Digital Television, the terrestrial television reception technique is based on terrestrial digital television system (DTMB), supports list/multicarrier.Device is followed Microsoft's broadcasting driving body system structure (BDA, BroadcastDriver Architecture) at hardware and Drive Layer, and the terminal software layer is followed the DirectShow of Microsoft application framework, and integrated privately owned deciphering and descrambling module.Wherein DirectShow is that the software developer that can allow that Microsoft develops carries out the application programming interface of various different disposal to media file.
The apparatus for deciphering and descrambling of present embodiment comprises: digital signal receiver module 10, condition receive (CA) card read-write interface module 11, demultiplexing module 12, deciphering module 13, descrambling module 14, decoder module 15 and playing module 16.Wherein condition receiving card read-write interface module 11 is embedded in the digital signal receiver module 10, and both form incorporate structure, and this incorporate structure links to each other with receiving terminal (for example PC) by the USB interface of digital signal receiving interface module 10.The digital signal receiver module is reduced into the modulated digital signal demodulation that receives the digital television signal (for example finishing the demodulation reduction by tuner) of encrypting scrambling.This digital television signal follow BDA filter on the Drive Layer be treated as TS stream after, demultiplex into the video-voice frequency flow and the corresponding authorization message of scrambling in demultiplexing module 12, these authorization messages comprise ECM (EntitlementControl Message), EMM (Entitlement Management Message), PID and a plurality of tables of data.The video-voice frequency flow of scrambling enters descrambling module 14, and authorization message enters deciphering module 13.Deciphering module 13 receives the data of (CA) card in 17 (being called IC-card or smart card Smart Card again) by condition receiving card read-write interface module 11 reading conditions, and therefrom obtain being used for the control word (CW of descrambling according to authorization message, Control Word), control word is transmitted to descrambling module 14.Descrambling module 14 is according to control word, and the audio/video flow of scrambling is carried out descrambling operation, obtains the audio/video flow behind the descrambling.Audio/video flow behind the descrambling is forwarded to decoder module 15.Decoder module 15 is followed the DirectShow of the Microsoft framework on the software layer, and the video-voice frequency flow behind the descrambling that this descrambling module is obtained converts the video-voice frequency flow that can play to, and decoder module 15 is supported Mpeg2, H.264 decoded with AVS.Play the video-voice frequency flow that this decoder module obtains by playing module 16 at last.
In addition, also comprise a system platform support module (not shown) in the device, the coupling of integrated operation system and calling function encapsulate the whole software layer, so that device can adapt to different operating system platforms.In order to realize other value-added service, device can also comprise an application interface module (not shown), and the routine interface of various value-added services is provided according to the information in the TS stream.
The condition receiving card read-write interface module of integral structure in the present embodiment provides CA deck at the stream receiving equipment when program stream is provided, and utilizes to drive and realize communicating by letter of CA card and terminal.
Second embodiment
Fig. 2 shows the principle of first embodiment of apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television of the present invention.See also Fig. 2, the function that the apparatus for deciphering and descrambling of present embodiment provides condition to receive for the receiving terminal of terrestrial wireless Digital Television, the terrestrial television reception technique is based on terrestrial digital television system (DTMB), supports list/multicarrier.Device is followed Microsoft's broadcasting driving body system structure (BDA, BroadcastDriver Architecture) at hardware and Drive Layer, and software layer is followed the DirectShow of Microsoft application framework on the terminal, and integrated privately owned deciphering and descrambling module.Wherein DirectShow is that the software developer that can allow that Microsoft develops carries out the application programming interface of various different disposal to media file.
The apparatus for deciphering and descrambling of present embodiment comprises: digital signal receiver module 20, condition receive (CA) card read-write interface module 21, demultiplexing module 22, deciphering module 23, descrambling module 24, decoder module 25 and playing module 26.Wherein condition receiving card read-write interface module 21 and digital signal receiver module 20 are structures of separate type, and condition receiving card read-write interface module 21 and digital signal receiver module 20 USB interface by separately respectively link to each other with receiving terminal (for example PC).The digital signal receiver module is reduced into the modulated digital signal demodulation that receives the digital television signal (for example finishing the demodulation reduction by tuner) of encrypting scrambling.This digital television signal follow BDA filter on the Drive Layer be treated as TS stream after, demultiplex into the video-voice frequency flow and the corresponding authorization message of scrambling in demultiplexing module 22, these authorization messages comprise ECM (EntitlementControl Message), EMM (Entitlement Management Message), PID and a plurality of tables of data.The video-voice frequency flow of scrambling enters descrambling module 24, and authorization message enters deciphering module 23.Deciphering module 23 receives the data of (CA) card in 27 (being called IC-card or smart card Smart Card again) by condition receiving card read-write interface module 21 reading conditions, and therefrom obtain being used for the control word (CW of descrambling according to authorization message, Control Word), control word is transmitted to descrambling module 24.Descrambling module 24 is according to control word, and the audio/video flow of scrambling is carried out descrambling operation, obtains the audio/video flow behind the descrambling.Audio/video flow behind the descrambling is forwarded to decoder module 25.Decoder module 25 is followed the DirectShow of the Microsoft framework on the software layer, and the video-voice frequency flow behind the descrambling that this descrambling module is obtained converts the video-voice frequency flow that can play to, and decoder module 15 is supported Mpeg2, H.264 decoded with AVS.Play the video-voice frequency flow that this decoder module obtains by playing module 26 at last.
In addition, also comprise a system platform support module (not shown) in the device, the coupling of integrated operation system and calling function encapsulate the whole software layer, so that device can adapt to different operating system platforms.In order to realize other value-added service, device can also comprise an application interface module (not shown), and the routine interface of various value-added services is provided according to the information in the TS stream.
The condition receiving card read-write interface module of the isolating construction in the present embodiment can cooperate current stream receiving terminal, and independently USB interface-based CA card hardware is provided, and realizes the read-write of CA card.
The present invention drives System Framework (BDA) by the broadcasting of integrated Microsoft and Microsoft looks audio frequency processing frame (DirectShow) and increases the mechanism of encrypting scrambling, make that the terrestrial wireless Digital Television also can the realization condition receiving system, ensure the program copyright, satisfied the operation demand.
The foregoing description provides to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (9)
1, a kind of apparatus for deciphering and descrambling of receiving terminal of terrestrial wireless Digital Television, the function of condition reception is provided for the receiving terminal of terrestrial wireless Digital Television, this Microsoft's broadcasting of installing in the integrated DirectShow of the Microsoft application programming interface drives System Framework to realize that this device comprises under this System Framework to reception, decoding and the broadcast of TS stream:
Condition receiving card read-write interface module provides the read-write operation to condition receiving card;
The digital signal receiver module is reduced into the modulated digital signal demodulation that receives the digital television signal of encrypting scrambling;
Demultiplexing module, this digital television signal are followed the processing that Microsoft broadcasting on the Drive Layer drives System Framework and are obtained TS stream, obtain the video-voice frequency flow and the corresponding authorization message of scrambling after will this TS stream demultiplexing;
Deciphering module receives the authorization message that this demultiplexing module obtains, and passes through this condition receiving card read-write interface module controlled word from this condition receiving card according to this authorization message;
Descrambling module, this control word that obtains by this condition receiving card read-write interface module is carried out descrambling according to this control word to the video-voice frequency flow of this scrambling;
Decoder module is followed the DirectShow of the Microsoft framework on the software layer, and the video-voice frequency flow behind the descrambling that this descrambling module is obtained converts the video-voice frequency flow that can play to;
Playing module is play the video-voice frequency flow that this decoder module obtains.
2, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 1 is characterized in that, this condition receiving card read-write interface module is embedded in and forms incorporate structure in this stream receiver module.
3, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 2 is characterized in that, this incorporate structure is connected by USB interface with this receiving terminal.
4, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 1 is characterized in that, the structure that this condition receiving card read-write interface module and this stream receiver module are separate types.
5, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 4 is characterized in that, this condition receiving card read-write interface module of separate type is connected with this receiving terminal by USB interface respectively with this stream receiver module.
6, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 1, it is characterized in that, this device also comprises the system platform support module, the coupling of integrated operation system and calling function, this device the whole software layer encapsulated, so that can adapt to different operating system platforms.
7, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 1 is characterized in that, this authorization message comprises ECM, EMM, PID and a plurality of tables of data.
8, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 1 is characterized in that, this device also comprises:
Application interface module provides the interface of various value-added services according to the information in the TS stream.
9, the apparatus for deciphering and descrambling of the receiving terminal of terrestrial wireless Digital Television according to claim 1 is characterized in that, this decoder module is supported Mpeg2, H.264 decoded with AVS.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100427181A CN101355687A (en) | 2008-09-10 | 2008-09-10 | Apparatus for deciphering and descrambling receiving terminal of ground wireless digital television |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100427181A CN101355687A (en) | 2008-09-10 | 2008-09-10 | Apparatus for deciphering and descrambling receiving terminal of ground wireless digital television |
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| CN101355687A true CN101355687A (en) | 2009-01-28 |
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| CNA2008100427181A Pending CN101355687A (en) | 2008-09-10 | 2008-09-10 | Apparatus for deciphering and descrambling receiving terminal of ground wireless digital television |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102164320A (en) * | 2011-04-11 | 2011-08-24 | 北京数字太和科技有限责任公司 | Improved terminal based on conditional access technology |
| CN102223582A (en) * | 2010-04-16 | 2011-10-19 | 施郁锵 | Decrypting descrambling device, decrypting descrambling method and disposing method |
| CN102244796A (en) * | 2010-05-10 | 2011-11-16 | 联发科技股份有限公司 | Stream processing method and stream processing apparatus |
| CN102340702A (en) * | 2010-07-23 | 2012-02-01 | 航天信息股份有限公司 | IPTV (Internet protocol television) network playing system and rights management and descrambling method based on USB (Universal serial bus) Key |
| CN105791853A (en) * | 2016-03-04 | 2016-07-20 | 广东工业大学 | Encrypted embedded video chaotic secret communication method after H.264 coding |
| CN106776102A (en) * | 2016-12-27 | 2017-05-31 | 中国建设银行股份有限公司 | A kind of application system health examination method and system |
| CN112637650A (en) * | 2021-01-04 | 2021-04-09 | 国微集团(深圳)有限公司 | Condition receiving module |
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2008
- 2008-09-10 CN CNA2008100427181A patent/CN101355687A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223582A (en) * | 2010-04-16 | 2011-10-19 | 施郁锵 | Decrypting descrambling device, decrypting descrambling method and disposing method |
| CN102223582B (en) * | 2010-04-16 | 2014-09-17 | 施郁锵 | Decrypting descrambling device, decrypting descrambling method and disposing method |
| CN102244796A (en) * | 2010-05-10 | 2011-11-16 | 联发科技股份有限公司 | Stream processing method and stream processing apparatus |
| CN102340702A (en) * | 2010-07-23 | 2012-02-01 | 航天信息股份有限公司 | IPTV (Internet protocol television) network playing system and rights management and descrambling method based on USB (Universal serial bus) Key |
| CN102340702B (en) * | 2010-07-23 | 2013-07-24 | 航天信息股份有限公司 | IPTV (Internet protocol television) network playing system and rights management and descrambling method based on USB (Universal serial bus) Key |
| CN102164320A (en) * | 2011-04-11 | 2011-08-24 | 北京数字太和科技有限责任公司 | Improved terminal based on conditional access technology |
| CN102164320B (en) * | 2011-04-11 | 2016-06-22 | 北京数字太和科技有限责任公司 | A kind of terminal based on conditional access technology of improvement |
| US9479825B2 (en) | 2011-04-11 | 2016-10-25 | Unitend Technologies Inc. | Terminal based on conditional access technology |
| CN105791853A (en) * | 2016-03-04 | 2016-07-20 | 广东工业大学 | Encrypted embedded video chaotic secret communication method after H.264 coding |
| CN105791853B (en) * | 2016-03-04 | 2018-02-09 | 广东工业大学 | H.264 a kind of embedded video Development of Chaotic Secure Communication Method encrypted after coding |
| CN106776102A (en) * | 2016-12-27 | 2017-05-31 | 中国建设银行股份有限公司 | A kind of application system health examination method and system |
| CN112637650A (en) * | 2021-01-04 | 2021-04-09 | 国微集团(深圳)有限公司 | Condition receiving module |
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Open date: 20090128 |