CN102957961B - Share the method for encrypted digital television program, device and digital television receiver - Google Patents
Share the method for encrypted digital television program, device and digital television receiver Download PDFInfo
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Abstract
The invention discloses a kind of method of shared encrypted digital television program, device and digital television receiver.Described method comprises the steps: to receive encrypted digital television program TS stream and demultiplexing, therefrom extracts Program Association Table information, program map table information and CAT Conditional Access Table information; Obtain audio frequency and video Packet Identifier, Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier; From TS stream, obtain Entitlement Control Message and Entitlement Management Message, utilize descrambling module process Entitlement Control Message and Entitlement Management Message, obtain ciphered program control word; From TS stream, the audio, video data after deciphering is obtained according to audio frequency and video Packet Identifier and ciphered program control word; Audio, video data after deciphering decoded by communications interface transmission to decoding playback terminal and play, thus only there is the playback terminal watching encrypted TV programme of decoding function, achieving sharing of encrypted digital television program.
Description
Technical field
The invention belongs to digital television techniques field, specifically, relate to the process to encrypted digital television program data, more particularly, relate to the method for shared encrypted digital television program, device and digital television receiver.
Background technology
At present, user, to watching encrypted digital television program, needs to insert smart card in Set Top Box or all-in-one, utilizes descrambling module to parse the Control Word of ciphered program, then is play on TV after audio/video flow deciphering by Control Word.Therefore, user cannot watch the TV programme of encryption by the playback terminal such as mobile phone, PC without smart card, have impact on the health check-up of user's TV reception, limit the popularization of TV programme.
Summary of the invention
The present invention is directed to user in prior art and can only watch digital television program at the playback terminal with smart card and the limited problem of the viewing existed, provide a kind of method and apparatus of shared encrypted digital television program, make user that can the playback terminal watching encrypted digital television program of smart card be set.
For achieving the above object, method provided by the invention adopts following technical proposals to be achieved:
A method for shared encrypted digital television program, described method comprises the steps:
A1, reception encrypted digital television program TS stream also demultiplexing, therefrom extract Program Association Table information, program map table information and CAT Conditional Access Table information;
A2, obtain audio frequency and video Packet Identifier and Entitlement Control Message Packet Identifier, according to CAT Conditional Access Table acquisition of information Entitlement Management Message Packet Identifier according to Program Association Table information and program map table information;
A3, from TS stream, obtain Entitlement Control Message and Entitlement Management Message according to Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier, utilize descrambling module process Entitlement Control Message and Entitlement Management Message, obtain ciphered program control word;
A4, according to audio frequency and video Packet Identifier and the ciphered program control word audio, video data from TS stream after Real-time Obtaining deciphering;
A5, by deciphering after audio, video data by communications interface transmission to decoding playback terminal decode and play.
Method as above, the encrypted digital television program TS received in described step a1 flow for broadcasting and TV front end delivery, TS stream before non-demodulation, to ensure that the encrypted digital television program shared is by the restriction of local broadcast program.
Method as above, can also watch electronic program guides for realizing user, also comprising the process obtaining electronic program guide data from TS stream before described step a5 while decoding playback terminal shares ciphered program; In step a5, first the audio, video data after electronic program guide data and deciphering is complex as TS and flow, and then the TS after compound is flowed through communications interface transmission and decode to playback terminal of decoding and play.
For realizing aforementioned invention object, device provided by the invention adopts following technical proposals to realize:
A kind of encrypted digital television of sharing saves destination device, and described device comprises:
TS flows receiving element, flows for received television program TS;
Demultiplexing device, flow receiving element with TS to be connected, for extracting Program Association Table information, program map table information and CAT Conditional Access Table information from TV programme TS stream, and obtain audio frequency and video Packet Identifier, Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier according to relevant information;
Descrambling unit, flow receiving element with Demultiplexing device with TS to be connected, for obtaining Entitlement Control Message and Entitlement Management Message according to Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier from TS stream, obtaining ciphered program control word according to acquisition Entitlement Control Message and Entitlement Management Message and exporting;
Audio, video data acquiring unit, flows receiving element with Descrambling unit, Demultiplexing device and TS and is connected, for according to ciphered program control word from TS stream Real-time Obtaining deciphering after audio, video data and export;
Communication interface, is connected with audio, video data acquiring unit, for sending the audio, video data after deciphering;
Decoding playback terminal, is connected with communication interface, the audio, video data after receiving and deciphering, and carries out decoding broadcasting.
Device as above, for ensure decoding playback terminal the encrypted digital television program shared be not subject to the restriction of local broadcast program, described TS flow receiving element receive broadcasting and TV front end delivery, TS stream before non-demodulation, described Demultiplexing device is the equipment playing encrypted digital television program Demultiplexing device independent of this locality.
Device as above, can also watch electronic program guides for realizing user while decoding playback terminal shares ciphered program, described device also comprises:
Electronic program guide data acquiring unit, flows receiving element with described Demultiplexing device with described TS and is connected, for obtaining electronic program guides related data from TS stream;
Data recombiner unit, is connected with electronic program guide data acquiring unit, described audio, video data acquiring unit and described communication interface, flows for the audio, video data after electronic program guide data and deciphering is complex as TS and exports communication interface to.
Present invention also offers a kind of digital television receiver, comprise local cipher digital television program Play System and shared encrypted digital television program data acquisition system, share encrypted digital television program data acquisition system and comprise:
TS flows receiving element, for receive broadcasting and TV front end delivery, TV programme TS stream before non-demodulation;
Demultiplexing device, flow receiving element with TS to be connected, for extracting Program Association Table information, program map table information and CAT Conditional Access Table information from TV programme TS stream, and obtain audio frequency and video Packet Identifier, Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier according to relevant information;
Descrambling unit, flow receiving element with Demultiplexing device with TS to be connected, for obtaining Entitlement Control Message and Entitlement Management Message according to Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier from TS stream, obtaining ciphered program control word according to acquisition Entitlement Control Message and Entitlement Management Message and exporting;
Audio, video data acquiring unit, flows receiving element with Descrambling unit, Demultiplexing device and TS and is connected, for according to ciphered program control word from TS stream Real-time Obtaining deciphering after audio, video data and export;
Communication interface, is connected with audio, video data acquiring unit, for sending the audio, video data after deciphering.
Digital television receiver as above, described shared encrypted digital television program data obtains system and also comprises:
Electronic program guide data acquiring unit, flows receiving element with described Demultiplexing device with described TS and is connected, for obtaining electronic program guides related data from TS stream;
Data recombiner unit, is connected with electronic program guide data acquiring unit, described audio, video data acquiring unit and described communication interface, flows for the audio, video data after electronic program guide data and deciphering is complex as TS and exports communication interface to.
Wherein, described digital television receiver is digital TV set-top box or digital TV integrated machine.
Compared with prior art, advantage of the present invention and good effect are: the present invention utilizes the descrambling module had in the equipment of smart card to encrypted digital television program decryption, obtain the audio, video data after deciphering, then the audio, video data after deciphering is sent to the decoding playback terminal with decoding function, can not only on the equipment with smart card watching encrypted digital television program, can also watch at the playback terminal only with decoding function, achieve sharing of encrypted digital television program.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention shares a method embodiment of encrypted digital television program;
Fig. 2 is the structured flowchart that the present invention shares an encrypted digital television joint destination device embodiment;
Fig. 3 is the structured flowchart that the present invention shares another embodiment of encrypted digital television joint destination device;
Fig. 4 is the part-structure block diagram of a digital television receiver of the present invention embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail.
First, what brief description the present invention shared encrypted digital television program realizes thought: in order to not have the playback terminal watching encrypted digital television program of smart card, by the descrambling module had in the equipment of smart card, ciphered program can be decoded, obtain the audio frequency and video TS stream after deciphering.TS stream after this deciphering becomes the publicity with decoding function playback terminal, transparent TV programme, directly can be sent to decoding playback terminal to play, make encrypted television program not only can carry out this locality in the equipment with smart card to play, can also play at other decoding playback terminals without smart card, thus realize sharing of encrypted digital television program.
Please refer to Fig. 1, figure 1 show the flow chart that the present invention shares a method embodiment of encrypted digital television program.This embodiment in order to by the Set Top Box with smart card as decryption device, acquisition the digital television program forwarded after deciphering is example, realize sharing of encrypted digital television program and can adopt following step to realize:
Step 11: flow process starts.
Step 12: receive encrypted digital television program TS stream and demultiplexing, extracts Program Association Table PAT information, Program Map Table PMT information and CAT Conditional Access Table CAT information.
When carrying out demultiplexing, can directly utilize in Set Top Box the Demultiplexing device playing local cipher digital television program, like this, other playback terminal and Set Top Box play the TV programme of identical frequency.In order to increase the selectance of the TV programme that playback terminal is play, make it not by the restriction of Set Top Box Demultiplexing device, this embodiment preferably arranges two Demultiplexing device in Set Top Box, one of them is as the demultiplexing of the local broadcast program of Set Top Box, and another is exclusively used in the demultiplexing of shared TV programme.And, be exclusively used in shared TV programme Demultiplexing device can directly to broadcasting and TV front end delivery, carry out demultiplexing without the TS stream of the tuning unit demodulates of Set Top Box, a tuner can be saved, the hardware cost of Set Top Box can not be increased.
Step 13: according to PAT information and PMT acquisition of information audio frequency and video Packet Identifier (audio frequency and video PID) and Entitlement Control Message Packet Identifier (ECM PID), according to CAT Conditional Access Table acquisition of information Entitlement Management Message Packet Identifier (EMM PID).
Step 14: obtain Entitlement Control Message and Entitlement Management Message, utilizes descrambling module to obtain ciphered program control word.
After step 13 obtains ECM PID and EMM PID, from TS stream, obtain Entitlement Control Message and Entitlement Management Message according to respective PID.Then, utilize the descrambling module process Entitlement Control Message in Set Top Box and Entitlement Management Message, thus obtain ciphered program Control Word.
Step 15: according to the audio, video data after audio frequency and video PID and the deciphering of ciphered program Control Word Real-time Obtaining.
Step 16: by deciphering after audio, video data by communications interface transmission to playback terminal of decoding.
Audio, video data after deciphering can by certain retransmission protocol, according to user watch request be sent to decoding playback terminal from the communication interface of Set Top Box with the form of packet.
Step 17: decoding playback terminal is play after the audio, video data decoding after deciphering.
For decoding playback terminal, the audio, video data sent due to Set Top Box is the data after deciphering, and also i.e. non-scrambled data, then only require that it has audio/video decoding ability, can play after carrying out audio decoder and video decode respectively to the data received.
This embodiment is by means of the simply unified communication interface of Set Top Box with decoding playback terminal, the descrambling module in Set Top Box can be utilized, while not affecting Set Top Box normal play ciphered program, the audio frequency and video TS obtained real-time and accurately after same frequency or different frequent points program decryption flows and transfers to decoding playback terminal, realizes decoding playback terminal to the broadcasting of encrypted digital television program.And in this embodiment, the audio, video data after deciphering the mode of callback data can be supplied to decoding playback terminal, is not construed as limiting, can determines according to practical application Data Transport Protocol, use simple, flexibly.
In addition, electronic program guide (EPG) is checked for the convenience of the user at decoding playback terminal, Set Top Box, except by except transmission after audio, video data deciphering, can also obtain electronic program guide data according to PAT information, PMT information, Event Information Table (EIT) information, network information table (NIT) information and SDT Service Description Table (SDT) information etc. from TS stream.Then, by electronic program guide data and deciphering after audio, video data be complex as TS stream, and then the TS after compound is flowed through communications interface transmission to decoding playback terminal decode and play.
Please refer to Fig. 2, this Fig. 2 shows the structured flowchart that the present invention shares an encrypted digital television joint destination device embodiment.
As shown in Figure 2, for realizing sharing of encrypted digital television program, the cell mesh included by the device of this embodiment, annexation each other and the function realized as follows:
TS flows receiving element 211, for receiving the TV programme TS stream of encryption.
Demultiplexing device 212, flow receiving element 211 with TS to be connected, for extracting Program Association Table information, program map table information and CAT Conditional Access Table information from TV programme TS stream, and obtain audio frequency and video Packet Identifier, Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier according to relevant information.
Descrambling unit 213, flow receiving element 211 with Demultiplexing device 212 with TS to be connected, for obtaining Entitlement Control Message and Entitlement Management Message according to Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier from TS stream, obtaining ciphered program control word according to acquisition Entitlement Control Message and Entitlement Management Message and exporting.
Audio, video data acquiring unit 214, flows receiving element 211 with Descrambling unit 213, Demultiplexing device 212 and TS and is connected, for according to ciphered program control word from TS stream Real-time Obtaining deciphering after audio, video data and export.
Communication interface 215, is connected with audio, video data acquiring unit 214, for sending the audio, video data after deciphering.
The decoding playback terminal 20 be made up of the communication interface 216 connected successively, TS stream decoding unit 217 and program broadcast unit 218, wherein, communication interface 216 is connected with communication interface 215, audio, video data after receiving and deciphering, then flow decoding unit 217 through TS to decode, play by program broadcast unit 218 after decoding.
Wherein, it is be arranged on the structure in the digital television receivers such as the Set Top Box with smart card that TS flows receiving element 211, Demultiplexing device 212, Descrambling unit 213, audio, video data acquiring unit 214 and communication interface 215, can be that digital television receiver realizes local program encrypting and plays structure used, also can be the independent structure arranged.Preferably, TS flows receiving element 211 and Demultiplexing device 21 plays structure used independent of digital television receiver local program encrypting, and TS stream receiving element 211 receives the TS stream before broadcasting and TV front end delivery, non-demodulation; And Descrambling unit 213 is the structures in Set Top Box, communication interface 215 is communication interfaces that Set Top Box carries.
The device of this structure, under the cooperation of relevant software programs, is not arranging smart card by realizing encrypted digital television program according to the flow process described in Fig. 1 but is having the broadcasting that TS flows the decoding playback terminal 20 of decoding function.
Please refer to Fig. 3, this Figure 3 shows that the present invention shares the structured flowchart of another embodiment of encrypted digital television joint destination device.
As shown in Figure 3, similar with Fig. 2 embodiment, this embodiment is shared encrypted digital television joint destination device and is also included TS stream receiving element 311, Demultiplexing device 312, Descrambling unit 313, audio, video data acquiring unit 314 and communication interface 317, and flow by communication interface 316, TS function that these structures of decoding playback terminal 30. that decoding unit 317 and program broadcast unit 318 form realize and Fig. 2 embodiment similar, do not repeat at this.
And also include with Fig. 2 embodiment the electronic program guide data acquiring unit 315 flowing receiving element 311 with Demultiplexing device 312 and TS and be connected unlike the device of, this embodiment, for obtaining electronic program guides related data from TS stream; And
Data recombiner unit 316, is connected with electronic program guide data acquiring unit 315, audio, video data acquiring unit 314 and communication interface 317, flows for the audio, video data after electronic program guide data and deciphering is complex as TS and exports communication interface to.
By arranging electronic program guide data acquiring unit 315 and data recombiner unit 316, electronic program guide data can be transferred in the lump decoding playback terminal 30, user can check electronic program guides on decoding playback terminal 30, meets the viewing demand of user to the existing rich content of TV programme.
Please refer to Fig. 4, this Fig. 4 shows the part-structure block diagram of a digital television receiver of the present invention embodiment.
This embodiment, for digital TV set-top box, is provided with smart card and the encrypted digital television performance broadcasting system 41 realizing local program encrypting broadcasting in this Set Top Box, also have shared encrypted digital television program data and obtain system 42.
Wherein, local program encrypting Play System 41 includes tuner 411, Demultiplexing device 412, Descrambling unit 413, audio, video data acquiring unit 414 and program broadcast unit 415, each unit co-ordination, realizes the broadcasting to local cipher digital television program.
Share encrypted digital television program data acquisition system 42 specifically to comprise: TS flows receiving element 421, Demultiplexing device 422, Descrambling unit 423, audio, video data acquiring unit 424 and communication interface 425, and the concrete annexation between each structure and the function realized can with reference to described in figure 2 embodiments.
And in this embodiment, the TS shared in encrypted digital television program data acquisition system 42 is flowed receiving element 421 and directly receives the TS stream come by cable transmission broadcasting and TV front end; Demultiplexing device 412 in its Demultiplexing device 422 and encrypted digital television performance broadcasting system 41 is the separate Demultiplexing device of two covers, and Descrambling unit 413 and Descrambling unit 423 are same structure, all adopt the Descrambling unit in Set Top Box to realize.Thus utilize two cover Demultiplexing device and smart cards in Set Top Box, not only realize the broadcasting of Set Top Box local cipher digital television program, digital television program data after deciphering can also be transferred to other by communication interface 425 not have in the playback terminal of smart card and play, realize the shared of the encrypted digital television program data identical or different with the local ciphered program play.
Above embodiment only in order to technical scheme of the present invention to be described, but not is limited; Although with reference to previous embodiment to invention has been detailed description, for the person of ordinary skill of the art, still can modify to the technical scheme described in previous embodiment, or equivalent replacement is carried out to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (8)
1. a method for shared encrypted digital television program, is characterized in that, described method comprises the steps:
A1, reception encrypted digital television program TS stream also demultiplexing, therefrom extract Program Association Table information, program map table information and CAT Conditional Access Table information;
A2, obtain audio frequency and video Packet Identifier and Entitlement Control Message Packet Identifier, according to CAT Conditional Access Table acquisition of information Entitlement Management Message Packet Identifier according to Program Association Table information and program map table information;
A3, from TS stream, obtain Entitlement Control Message and Entitlement Management Message according to Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier, utilize descrambling module process Entitlement Control Message and Entitlement Management Message, obtain ciphered program control word;
A4, according to audio frequency and video Packet Identifier and the ciphered program control word audio, video data from TS stream after Real-time Obtaining deciphering;
A5, by deciphering after audio, video data by communications interface transmission to decoding playback terminal decode and play;
Wherein, the encrypted digital television program TS that receives in described step a1 flow for broadcasting and TV front end delivery, TS stream before non-demodulation.
2. method according to claim 1, is characterized in that, also comprises the process obtaining electronic program guide data from TS stream before described step a5; In step a5, first the audio, video data after electronic program guide data and deciphering is complex as TS and flow, and then the TS after compound is flowed through communications interface transmission and decode to playback terminal of decoding and play.
3. a shared encrypted digital television joint destination device, it is characterized in that, described device comprises:
TS flows receiving element, flows for received television program TS;
Demultiplexing device, flow receiving element with TS to be connected, for extracting Program Association Table information, program map table information and CAT Conditional Access Table information from TV programme TS stream, and obtain audio frequency and video Packet Identifier, Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier according to relevant information;
Descrambling unit, flow receiving element with Demultiplexing device with TS to be connected, for obtaining Entitlement Control Message and Entitlement Management Message according to Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier from TS stream, obtaining ciphered program control word according to acquisition Entitlement Control Message and Entitlement Management Message and exporting;
Audio, video data acquiring unit, flows receiving element with Descrambling unit, Demultiplexing device and TS and is connected, for according to ciphered program control word from TS stream Real-time Obtaining deciphering after audio, video data and export;
Communication interface, is connected with audio, video data acquiring unit, for sending the audio, video data after deciphering;
Decoding playback terminal, is connected with communication interface, the audio, video data after receiving and deciphering, and carries out decoding broadcasting;
Wherein, described TS flow receiving element receive broadcasting and TV front end delivery, TS stream before non-demodulation, described Demultiplexing device is the equipment playing encrypted digital television program Demultiplexing device independent of this locality.
4. device according to claim 3, is characterized in that, described device also comprises:
Electronic program guide data acquiring unit, flows receiving element with described Demultiplexing device with described TS and is connected, for obtaining electronic program guides related data from TS stream;
Data recombiner unit, is connected with electronic program guide data acquiring unit, described audio, video data acquiring unit and described communication interface, flows for the audio, video data after electronic program guide data and deciphering is complex as TS and exports communication interface to.
5. a digital television receiver, comprises local cipher digital television program Play System and shared encrypted digital television program data obtains system, it is characterized in that, shares encrypted digital television program data acquisition system and comprises:
TS flows receiving element, for receive broadcasting and TV front end delivery, TV programme TS stream before non-demodulation;
Demultiplexing device, flow receiving element with TS to be connected, for extracting Program Association Table information, program map table information and CAT Conditional Access Table information from TV programme TS stream, and obtain audio frequency and video Packet Identifier, Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier according to relevant information;
Descrambling unit, flow receiving element with Demultiplexing device with TS to be connected, for obtaining Entitlement Control Message and Entitlement Management Message according to Entitlement Control Message Packet Identifier and Entitlement Management Message Packet Identifier from TS stream, obtaining ciphered program control word according to acquisition Entitlement Control Message and Entitlement Management Message and exporting;
Audio, video data acquiring unit, flows receiving element with Descrambling unit, Demultiplexing device and TS and is connected, for according to ciphered program control word from TS stream Real-time Obtaining deciphering after audio, video data and export;
Communication interface, is connected with audio, video data acquiring unit, for sending the audio, video data after deciphering.
6. digital television receiver according to claim 5, is characterized in that, described shared encrypted digital television program data obtains system and also comprises:
Electronic program guide data acquiring unit, flows receiving element with described Demultiplexing device with described TS and is connected, for obtaining electronic program guides related data from TS stream;
Data recombiner unit, is connected with electronic program guide data acquiring unit, described audio, video data acquiring unit and described communication interface, flows for the audio, video data after electronic program guide data and deciphering is complex as TS and exports communication interface to.
7. the digital television receiver according to claim 5 or 6, is characterized in that, described digital television receiver is digital TV set-top box.
8. the digital television receiver according to claim 5 or 6, is characterized in that, described digital television receiver is digital TV integrated machine.
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| CN201210510249.8A CN102957961B (en) | 2012-12-04 | 2012-12-04 | Share the method for encrypted digital television program, device and digital television receiver |
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| CN103686434A (en) * | 2013-12-17 | 2014-03-26 | 深圳市同洲电子股份有限公司 | Digital television program sharing method, terminal and system |
| CN103686214B (en) * | 2013-12-30 | 2017-09-05 | 深圳Tcl新技术有限公司 | Method, front end and the terminal of encrypted television program are encrypted and played to TV programme |
| CN104244082A (en) * | 2014-09-28 | 2014-12-24 | 深圳国微技术有限公司 | Digital video broadcasting transport stream playing method and system and terminal |
| CN104469407B (en) * | 2014-12-25 | 2017-06-06 | 山东泰信电子股份有限公司 | A kind of method for ensureing digital television program content safety, system and scrambling device |
| CN104703029B (en) * | 2015-02-06 | 2017-11-24 | 深圳市三峰光电科技有限公司 | A kind of digital television program flow point enjoys method, apparatus, terminal and system |
| CN105657501B (en) * | 2016-01-28 | 2019-05-28 | 深圳国微技术有限公司 | A kind of digital TV direct system and method |
| CN105872726B (en) * | 2016-05-24 | 2019-11-26 | 华为技术有限公司 | A kind of television program playing method, relevant device and system |
| CN106454410A (en) * | 2016-12-20 | 2017-02-22 | 深圳Tcl数字技术有限公司 | Copyright protection method and device for encrypted program |
| CN106713977B (en) * | 2016-12-22 | 2020-01-14 | 深圳Tcl数字技术有限公司 | Network playing method and device |
| CN106911957A (en) * | 2017-02-24 | 2017-06-30 | 山东浪潮商用***有限公司 | A kind of processing method of Set Top Box and a kind of Set Top Box |
| CN107040803B (en) * | 2017-03-31 | 2020-04-14 | 青岛海信电器股份有限公司 | Digital television system and descrambling method for simultaneously supporting multiple channels of programs with different frequency points |
| CN107135425A (en) * | 2017-05-17 | 2017-09-05 | 深圳国微技术有限公司 | A kind of media data processing method, apparatus and system |
| CN109195008A (en) * | 2018-11-13 | 2019-01-11 | 青岛海信电器股份有限公司 | A kind of playback method and device of scrambled program |
| CN109413491A (en) * | 2018-11-16 | 2019-03-01 | 青岛海信电器股份有限公司 | A kind of method and device of the descrambling audio, video data for reducing bandwidth |
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| CN101282456B (en) * | 2008-04-11 | 2010-08-04 | 青岛海信电器股份有限公司 | Method and apparatus for receiving digital television condition |
| CN101325774A (en) * | 2008-07-30 | 2008-12-17 | 青岛海信移动通信技术股份有限公司 | Encryption/decryption method and mobile terminal thereof |
| CN101355640A (en) * | 2008-09-11 | 2009-01-28 | 敖发良 | Multi-display digital television set-top box |
| EP2367317A1 (en) * | 2010-03-17 | 2011-09-21 | Logiways France | Verfahren und System zum Schutz eines Informationssignals durch ein Kontrollwort |
| CN102281463B (en) * | 2010-06-12 | 2016-02-10 | 中兴通讯股份有限公司 | Data card, terminal equipment, information transferring method and system |
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