CN101370076A - Method for implementing set-card separation based on USB interface - Google Patents
Method for implementing set-card separation based on USB interface Download PDFInfo
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- CN101370076A CN101370076A CNA2008101199905A CN200810119990A CN101370076A CN 101370076 A CN101370076 A CN 101370076A CN A2008101199905 A CNA2008101199905 A CN A2008101199905A CN 200810119990 A CN200810119990 A CN 200810119990A CN 101370076 A CN101370076 A CN 101370076A
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Abstract
The invention provides a machine-card separation method of a digital television receiving terminator, wherein, the terminator is equipped with a USB port. The software of the digital television receiving terminator is stored in a card in the USB port. The information for decrypting the authorization message and scrambling control message which are transmitted by the front end of a conditional access system is stored in the card in the USB port so that the card in the USB port can decrypt the authorization message and scrambling control message. The technical scheme of the invention can improve commonality of the digital television terminator and decrease cost.
Description
Technical field
The present invention relates to digital TV field, relate more specifically to a kind of machine-card separation method of receiving terminal for digital television.
Background technology
Current Digital Television, hand held television become more and more universal.Digital Television can be divided into terrestrial DTV, cable digital TV, satellite digital TV from the transmission link branch.Hand held television refers to adopt portable terminal to receive the system of broadcast type TV signal, and portable terminal includes but not limited to mobile phone.
In Digital Television, hand held television (comprising mobile TV) field, generally in the following ways: utilize the front end system of condition receiving system (Conditional AccessSystem is called for short CAS) that TV programme is encrypted, the user who has bought TV programme is sent mandate at front end (as broadcasting agency).In terminal, need integrated and CAS agent software CAS front end system correspondence, and need the smart card of insertion and CAS front end system correspondence,, just can be decrypted and watch TV programme if the program mandate is arranged in the smart card.In general, the effect of CAS is to realize having the user of mandate can see TV, does not have the user who authorizes can not see TV.
Wherein, condition receiving system groundwork principle is: in the digital TV front-end system data are carried out encrypted transmission, simultaneously the decruption key and the decrypting process of user terminal are controlled, thereby guarantee to have only the paying customer just can watch selected program, thoroughly solve carrier charge problem and program transmission safety problem.
CAS comprises front end and two parts of terminal.Front end is responsible for data are carried out scrambling and encryption, and terminal is responsible for data are carried out descrambling and deciphering.Concrete process is with reference to figure 1:
Scrambling/descrambling
Change or control are transmitted some characteristic of business code flow under the CAS control that scrambling is meant in broadcast head end, make unwarranted recipient can not obtain correct business code flow; Descrambling is the inverse process of scrambling.Add descrambling and will follow relevant regulations in " the GY/Z 175-2001 digital television broadcasting condition receiving system standard " of China.
1. by using control word (Control Word is hereinafter to be referred as CW) the transmission stream (Transport Stream is hereinafter to be referred as TS) that comprises data is carried out scrambling at front end, the transmission stream TS ' after the generation scrambling; TS ' after the scrambling can't normally watch before not carrying out corresponding descrambling operation; The generation of CW and the scrambling of TS all are to carry out in scrambler usually.
2. use CW that TS ' is carried out descrambling in terminal, recover TS; The TS that recovers can normally watch; TS ' descrambling normally carries out in set-top box.
Encrypt/decrypt
Encryption is meant the value of using mathematical algorithm protection security information and CW in the CAS of broadcast head end, and making does not have the recipient who authorizes can't obtain security information and CW; The inverse process of deciphering for encrypting.
1. at front end CW and out of Memory are encrypted, generate Entitlement Control Message (Entitlement Control Message is hereinafter to be referred as ECM).The generation of ECM data all is to carry out in CAS usually.
2. also generate Entitlement Management Message (Entitlement ManagementMessage is hereinafter to be referred as EMM) at front end.May comprise information such as user ID, subscriber authorisation, authorization attribute, time among the EMM.The generation of EMM data all is to carry out in CAS usually, all encrypts usually.
3. in terminal EMM is decrypted, recovers Entitlement Management Message expressly.
4. in terminal ECM is decrypted, recovers CW; After obtaining CW, can carry out descrambling, recover TS TS '.
Authorize
Mandate is meant the permission that sends to terminal in broadcast head end, allows user's descrambling data.
1. authorization message generally includes the information such as sign, time of user ID, descrambling data.
2. when terminal is by use CW descrambling TS ', can judge at first whether the authorization message of preservation is effective, if effectively just can carry out corresponding descrambling operation.
Because the mechanism of the CAS that different manufacturers is produced is different with implementation, and there is not unified standard to follow, cause the CAS agent software difference in the terminal, this causes end product to produce according to the model of the cas system of the front end of the network at user place, can't accomplish the unification of end product.
In addition, digital TV terminal except can receiver, video, the audio signal, can also be used to developing value-added services, such as receiving multimedia message that mobile phone sends, view Internet webpage, TV shopping, TV voting or the like.
Carrying out these value-added services does not have unified standard to follow, therefore after new business of front end increase, must be in terminal integrated corresponding software, increased manufacturer terminal exploitation, maintenance cost and utilization merchant's operation, management cost so greatly.
In order to improve above-mentioned defective, the method for separation between machine and card has been proposed in the prior art.
The separation between machine and card of existing Digital Television has several modes, all at condition receiving system, purpose is the versatility problem that solves terminal receiver, makes the production of terminal receiver and certain concrete CAS irrelevant, but does not solve value-added service and the irrelevant problem of terminal;
Existing separation between machine and card mainly contains dual mode:
Separation between machine and card form one: the CA Module of DVB-CI standard definition.Deposit the CAS agent software in CAModule, descrambling is finished in CA Module.Pass through the DVB-CI interface communication between CAModule and the digital television receiver.The CableCard standard of the U.S. similarly.Compare with the present invention, the module of the present invention definition not only has the repertoire of CA Module, also has the function of storage digital TV terminal software.
Separation between machine and card mode two: in receiving terminal, deposit the CAS agent software with CAS front end system correspondence, and need to insert and the smart card of CAS front end system correspondence, could be decrypted TV programme and watch.In this mode, CAS agent software and receiving terminal for digital television remain and integrate, and can't solve the versatility problem of receiving terminal.
As seen, be necessary to provide a kind of and can realize effectively that the production of digital TV terminal does not rely on the solution of CAS front end, to improve the versatility of digital TV terminal.
Summary of the invention
The object of the invention is to provide a kind of machine-card separation method of Digital Television, is beneficial to improve the versatility of digital TV terminal receiver.
Machine-card separation method according to receiving terminal for digital television of the present invention is characterized in that: have USB interface on the receiving terminal; Digital television receiving terminal software is stored in the card of USB interface; To be used for information stores that authorization message that the front end of condition receiving system is sent and scrambling control information be decrypted card, and make the card of USB interface to be decrypted authorization message and scrambling control information in USB interface.
Wherein, terminal software comprises following one or more softwares: drive software, elementary video business software, value-added service related software and the agent software corresponding with the front end system of condition receiving system.
Wherein, drive software comprises following one or more softwares: tuner drive software, network interface card drive software, video decode drive software, audio decoder drive software, embedded OS.
Wherein, the value-added service related software comprise with following business in one or more relevant softwares: Email, electronic program guides, lottery industry, multimedia message, view Internet webpage, TV shopping, TV voting, speech communication, video communication.
Wherein, not resident drive software and/or elementary video business software and/or value-added service related software and/or conditional receiving system terminal agent software on the receiving terminal for digital television.
Wherein, not resident digital television receiving terminal software on the receiving terminal for digital television.
Wherein, also can resident drive software and/or elementary video business software and/or value-added service related software and/or conditional receiving system terminal agent software on the receiving terminal for digital television.
Wherein, also can resident digital television receiving terminal software on the receiving terminal for digital television.
Wherein, in the card of USB interface, realize descrambling to data.
Wherein, also can in receiving terminal for digital television, realize descrambling to data.
Wherein, above-mentioned USB, English is: Universal Serial Bus, Chinese is translated as USB usually, is called for short USB.
By technical scheme of the present invention, realized that the production of digital TV terminal does not rely on the CAS front end, improved the versatility of digital TV terminal.And the present invention not only solved the independence of terminal receiver and CAS, also solved terminal receiver and professional independence, makes production and certain concrete independent of service of terminal receiver.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the CAS theory diagram of prior art; And
Fig. 2 is the machine-card separation method flow chart of receiving terminal for digital television according to an embodiment of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 2 is the machine-card separation method flow chart of receiving terminal for digital television according to an embodiment of the invention.
The machine-card separation method of receiving terminal for digital television wherein, has USB interface on the receiving terminal according to an embodiment of the invention; Digital television receiving terminal software is stored in the card of USB interface; To be used for information stores that authorization message that the front end of condition receiving system is sent and scrambling control information be decrypted card, and make the card of USB interface to be decrypted authorization message and scrambling control information in USB interface.
Wherein, terminal software comprises following one or more softwares: drive software, elementary video business software, value-added service related software and the agent software corresponding with the front end system of condition receiving system.
Wherein, drive software comprises following one or more softwares: tuner drive software, network interface card drive software, video decode drive software, audio decoder drive software, embedded OS.
Wherein, the value-added service related software comprise with following business in one or more relevant softwares: Email, electronic program guides, lottery industry, multimedia message, view Internet webpage, TV shopping, TV voting, speech communication, video communication.
Wherein, not resident drive software and/or elementary video business software and/or value-added service related software and/or conditional receiving system terminal agent software on the receiving terminal for digital television.
Wherein, not resident digital television receiving terminal software on the receiving terminal for digital television.
Wherein, also can resident drive software and/or elementary video business software and/or value-added service related software and/or conditional receiving system terminal agent software on the receiving terminal for digital television.
Wherein, also can resident digital television receiving terminal software on the receiving terminal for digital television.
Wherein, in the card of USB interface, realize descrambling to data.
Wherein, in receiving terminal for digital television, realize descrambling to data.
Wherein, in the method, the card of USB interface also can have only a kind of function: be responsible for the storage digital television receiving terminal software.And in this method, when terminal was not inserted USB interface, terminal can resident software, also resident software not.
As seen, the present invention is integrated into digital TV terminal software and CAS decipher function in the card of USB interface, and digital TV terminal software is separated from digital TV terminal, makes the production of digital TV terminal can not rely on the business and the CAS of front end.
In sum, realized following technique effect: by technical scheme of the present invention, realized that the production of digital TV terminal does not rely on professional front end and CAS front end, improved the versatility of digital TV terminal, provided cost savings by technical scheme of the present invention.
Be embodiments of the invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. the machine-card separation method of a receiving terminal for digital television is characterized in that:
Has USB interface on the described receiving terminal;
Digital television receiving terminal software is stored in the card of USB interface;
To be used for information stores that authorization message that the front end of condition receiving system is sent and scrambling control information be decrypted card, and make the card of described USB interface to be decrypted described authorization message and scrambling control information in described USB interface.
2. the machine-card separation method of receiving terminal for digital television according to claim 1, it is characterized in that: described terminal software comprises following one or more softwares: drive software, elementary video business software, value-added service related software and the agent software corresponding with the front end system of described condition receiving system.
3. the machine-card separation method of receiving terminal for digital television according to claim 2 is characterized in that:
Drive software comprises following one or more softwares: tuner drive software, network interface card drive software, video decode drive software, audio decoder drive software, embedded OS.
4. the machine-card separation method of receiving terminal for digital television according to claim 2 is characterized in that:
The value-added service related software comprise with following business in one or more relevant softwares: Email, electronic program guides, lottery industry, multimedia message, view Internet webpage, TV shopping, TV voting, speech communication, video communication.
5. according to the machine-card separation method of claim 2 or 3 described receiving terminal for digital television, it is characterized in that: not resident drive software and/or elementary video business software and/or value-added service related software and/or conditional receiving system terminal agent software on the described receiving terminal for digital television.
6. the machine-card separation method of receiving terminal for digital television according to claim 1 is characterized in that: not resident described digital television receiving terminal software on the described receiving terminal for digital television.
7. according to the machine-card separation method of claim 2 or 3 described receiving terminal for digital television, it is characterized in that: resident drive software and/or elementary video business software and/or value-added service related software and/or conditional receiving system terminal agent software on the described receiving terminal for digital television.
8. the machine-card separation method of receiving terminal for digital television according to claim 1 is characterized in that: resident described digital television receiving terminal software on the described receiving terminal for digital television.
9. the machine-card separation method of receiving terminal for digital television according to claim 1 is characterized in that: realize the descrambling to data in the card of described USB interface.
10. the machine-card separation method of receiving terminal for digital television according to claim 1 is characterized in that: realize the descrambling to data in described receiving terminal for digital television.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101199905A CN101370076A (en) | 2008-10-21 | 2008-10-21 | Method for implementing set-card separation based on USB interface |
| PCT/CN2009/070485 WO2010017703A1 (en) | 2008-08-12 | 2009-02-20 | Set-card separation method in digital tv receiving terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101199905A CN101370076A (en) | 2008-10-21 | 2008-10-21 | Method for implementing set-card separation based on USB interface |
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| Publication Number | Publication Date |
|---|---|
| CN101370076A true CN101370076A (en) | 2009-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101199905A Pending CN101370076A (en) | 2008-08-12 | 2008-10-21 | Method for implementing set-card separation based on USB interface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010017703A1 (en) * | 2008-08-12 | 2010-02-18 | 北京数码视讯科技股份有限公司 | Set-card separation method in digital tv receiving terminal |
| CN101820512A (en) * | 2010-04-20 | 2010-09-01 | 常州太瑞电子科技有限公司 | UTI set-card separation-based application graphical interface transmission system |
| CN101860718A (en) * | 2010-04-20 | 2010-10-13 | 常州太瑞电子科技有限公司 | Novel UTI machine-card separation UTI card |
| CN103546785A (en) * | 2013-09-12 | 2014-01-29 | Tcl商用信息科技（惠州）股份有限公司 | Electronic equipment CA function realizing system and method based on USB (universal serial bus) |
| CN108271059A (en) * | 2015-06-10 | 2018-07-10 | 青岛海信电器股份有限公司 | A kind of method of display TV signal |
-
2008
- 2008-10-21 CN CNA2008101199905A patent/CN101370076A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010017703A1 (en) * | 2008-08-12 | 2010-02-18 | 北京数码视讯科技股份有限公司 | Set-card separation method in digital tv receiving terminal |
| CN101820512A (en) * | 2010-04-20 | 2010-09-01 | 常州太瑞电子科技有限公司 | UTI set-card separation-based application graphical interface transmission system |
| CN101860718A (en) * | 2010-04-20 | 2010-10-13 | 常州太瑞电子科技有限公司 | Novel UTI machine-card separation UTI card |
| CN103546785A (en) * | 2013-09-12 | 2014-01-29 | Tcl商用信息科技（惠州）股份有限公司 | Electronic equipment CA function realizing system and method based on USB (universal serial bus) |
| CN103546785B (en) * | 2013-09-12 | 2017-12-19 | Tcl商用信息科技（惠州）股份有限公司 | A kind of electronic equipment CA functions based on USB realize system and method |
| CN108271059A (en) * | 2015-06-10 | 2018-07-10 | 青岛海信电器股份有限公司 | A kind of method of display TV signal |
| CN108271059B (en) * | 2015-06-10 | 2020-12-01 | 海信视像科技股份有限公司 | Method for displaying television signal |
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Open date: 20090218 |