CN102098575B - Migration method compatible with multiple conditional access (CA) systems and CA method - Google Patents
Migration method compatible with multiple conditional access (CA) systems and CA method Download PDFInfo
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Abstract
The invention discloses a migration method compatible with multiple conditional access (CA) systems and a CA method. The migration method comprises the following steps of: installing multiple CA systems in a set top box program, setting a general interface function according to the functions of interfaces to be migrated of all CA systems and providing the general interface function to a set top box application program; judging the type of a CA system to which the current smart card belongs and calling the general interface function to initialize a module which is required to be used by a CA system which corresponds to the current smart card; and setting a general data structure, converting data output by different CA systems into a general data structure and providing the general data structure to the set top box application program. By the migration method, the migration compatibility of a CA system can be enhanced, software development flow of a set top box end is simplified, and cross-platform migration speed is increased.
Description
Technical field
The present invention relates to computer technology, specifically, relate to method and condition receiving method that can be compatible multiple condition receiving system is transplanted, belong to the digital television techniques field.
Background technology
Condition receives (CA) system and is used for the content of digital television program is carried out digital interference and encryption, to set up effective charging system, is called as the technical guarantee system that DTV develops in a healthy way.Processing such as the CA system mainly accomplishes the obtaining of subscriber authorisation control messages (ECM) and user authorization management message (EMM) at front end, generates, encrypts, transmission; Receive and handle ECM, the EMM information that front end CA system sends at receiving terminal, solve control word (CW), audio/video flow is carried out descrambling, realize the broadcast of audio frequency and video according to control word.
STB will be realized the descrambling to the program audio/video flow, need the CA system kernel be transplanted in the STB.The CA migration process is that the storehouse that provides with producer is a core, utilizes the CA kernel to realize physical layer interface, for the set-top box application program provides unified function interface.At present, have the CA system of a plurality of different manufacturers, look rich, digital video signal, calculate logical, day cypress etc. like Yongxin, the CA bottom function interface of different manufacturers is not quite similar on implementation.When in STB, transplanting the CA system, just need do corresponding transplanting according to the transplanting document of each CA system, set-top box application software overlaps in each CA system corresponding, therefore, in a STB, can only realize a kind of CA system.And; If will in the STB of platform, realize the CA system of another producer, perhaps in the STB of different platform, realize the CA system of same producer, because the bottom function is inconsistent; Can't directly transplanting; All need develop a cover application software again, expend the huge time and efforts of software developer, transplant time is longer.
On the other hand, prior art is realizing the CA related application when the single CA of transplanting system; For example authorize, mail; When fingerprint, IPPV (instant video program request), IPPT functions such as (program requests of paying immediately), only consider the data structure of native system, make the set-top box application program to adopt Different software to handle respectively to each CA system; Reduce the speed of transplanting the CA system, be unfavorable for the improvement that the CA system transplantation is compatible.
Summary of the invention
One of the object of the invention is to provide a kind of compatibility method that multiple condition receiving system is transplanted, and to improve the compatibility of CA system transplantation, simplifies STB end software development flow, improves cross-platform transplanting speed.
For realizing the foregoing invention purpose, the present invention adopts following technical proposals to be achieved:
The method that the multiple condition receiving system of a kind of compatibility is transplanted, said method comprises the steps:
A1, in the STB program built-in some kinds of condition receiving systems, the function setting general-purpose interface function of the interface that will transplant according to all conditions receiving system offers the set-top box application program;
A2, judge the type of the condition receiving system under the current smart card, call general-purpose interface function pair and carry out initialization with the module that the corresponding condition receiving system of current smart card need be used;
A3, setting general-purpose data structure, the data that the different condition receiving system is exported convert common data structure respectively into, offer the set-top box application program.
The method that the multiple condition receiving system of aforesaid compatibility is transplanted; Specifically; Said general-purpose interface function is the interface function that multiple CA system has general character, the communication interface function, demultiplexing interface function and the data memory interface function that comprise OS adaptation layer interface function, communicate with smart card.
The method that the multiple condition receiving system of aforesaid compatibility is transplanted; For avoiding taking, provide resource utilization to STB common interface resource; Said general-purpose interface function also comprises the realizing interface function of release conditions receiving system function, can discharge its shared resource when the exit criteria receiving system through this realizing interface function.
The method that the multiple condition receiving system of aforesaid compatibility is transplanted in said step a2, can be judged the type of the condition receiving system under the current smart card according to the card host-host protocol of current smart card and card sign.
The method that the multiple condition receiving system of aforesaid compatibility is transplanted; In said step a2, the initialization that the corresponding condition receiving system of current smart card is carried out comprises the initialization of OS adaptation layer, communication interface initialization, demultiplexing initialization and initialize memory.
Two of the object of the invention is to provide a kind of condition receiving method; The method that this condition receiving method is transplanted based on the multiple condition receiving system of above-mentioned compatibility can be implemented in and transplants the functions such as descrambling and empowerment management that the STB end that a plurality of condition receiving systems are arranged is realized digital television program.
For realizing the foregoing invention purpose, the present invention adopts following technical proposals to realize:
A kind of condition receiving method, said method comprises the steps:
B1, set-top box application procedure triggers condition receive, and call the general-purpose interface function condition receiving system is carried out initialization;
B2, call general-purpose interface function from TS stream, obtain the authorization control information and Entitlement Management Message, and transfer to the corresponding smart card of condition receiving system through the general-purpose interface function and carry out decryption processing;
B3, the scrambling control word after the decryption processing is offered descrambler through the general-purpose interface function, the audio/video flow of encrypting is carried out descrambling;
B4, be common data structure, offer the set-top box application program other Entitlement Control Message data and Entitlement Management Message data transaction after the decryption processing.
Aforesaid condition receiving method; For the integrality that guarantees data, avoid loss of data; In said step b2; Call the general-purpose interface function and from TS stream, obtain the authorization behind control information and the Entitlement Management Message, first buffer memory carries out decryption processing with complete Entitlement Control Message and Entitlement Management Message through the smart card that the general-purpose interface function transfers to the condition receiving system correspondence then.
Aforesaid condition receiving system uses for ease of application program, and in said step b4, the Entitlement Management Message data transaction after the decryption processing is a common data structure, offers the set-top box application program with call back function mode or message mode.
Aforesaid condition receiving system; In said step b1, the set-top box application program that trigger condition receives comprises that program, user that user in the playing programs process changes the platform operation switch at least a in the program of frequency operation and the program that monitoring front-end business information data version changes.
Aforesaid condition receiving system is characterized in that, in said step b1, calls the initialization that the general-purpose interface function carries out condition receiving system and comprises the initialization of OS adaptation layer, communication interface initialization, demultiplexing initialization and initialize memory.
Compared with prior art; Advantage of the present invention with good effect is: there are the characteristics of the identical interface interchange of partial function in the present invention when transplanting on STB according to the CA system of different manufacturers; Built-in multiple condition receiving system in STB, and the function setting general-purpose interface function of the interface that will transplant according to all conditions receiving system is as unified external standard interface function; Simultaneously, the setting general-purpose data structure, the data decryption that the different condition receiving system is exported converts a kind of common data structure respectively into; Utilize the relevant unified interface function and the unified common data structure that are provided with; Make things convenient for the transplanting of condition receiving system, compatible multiple various conditions receiving system has been simplified STB end software development flow simultaneously; Accelerated applied software development speed; Improve cross-platform transplanting speed simultaneously, improved the speed and the efficient of condition receiving system extraction private data, easy to use, simple.
After advantages embodiment of the present invention, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the flow chart of an embodiment of method of the compatible multiple condition receiving system transplanting of the present invention;
Fig. 2 is the flow chart of an embodiment of condition receiving method of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is done further detailed explanation.
The present invention is directed to and adopt own interface library defining interface when the existence conditions receiving system is transplanted separately and handle and compatibility, set-top box application program development that the condition receiving system that can't realize the different manufacturers type that exists is transplanted more, problem that resource-sharing property is relatively poor consuming time; Though consider that the physical layer interface implementation of various conditions receiving system is different but there are the characteristics of a lot of general character in the realization function as far as the set-top box application program; Proposed to transplant the method that compatible multiple condition receiving system is transplanted; This method is through being provided with relevant unified interface function and unified common data structure; Resource is carried out unified management, make things convenient for the transplanting of condition receiving system, simultaneously compatible multiple various conditions receiving system; Simplify STB end software development flow, improved cross-platform transplanting speed.
Fig. 1 shows the flow chart of an embodiment of method of the compatible multiple condition receiving system transplanting of the present invention.As shown in Figure 1, the concrete implementation procedure of this embodiment is following:
S11: built-in some kinds of condition receiving systems in the STB program, the function setting general-purpose interface function of the interface that will transplant according to all conditions receiving system offers the set-top box application program.
When nearly all condition receiving system is transplanted in the STB; Processing Interface such as all having stipulated the storage data-interface, receive data-interface, the condition receiving system kernel moves needed internal memory, message and the interface that communicates with smart card; The function that these interfaces are realized is identical, does not have big difference itself to program should be arranged.Therefore; For realizing the compatibility of application program to multiple condition receiving system; The communication interface function, demultiplexing interface function and the data memory interface function that communicate with OS adaptation layer interface function, with smart card are set at the general-purpose interface function, and the standard interface function of transplanting as condition receiving system offers the set-top box application program and uses.
In addition; For avoiding taking, provide resource utilization to STB common interface resource; The general-purpose interface function also comprises the realizing interface function of release conditions receiving system function, can discharge its shared resource when user's exit criteria receiving system through this realizing interface function.
S12: judge the type of the condition receiving system under the current smart card, call general-purpose interface function pair and carry out initialization with the module that the corresponding condition receiving system of current smart card need be used.
Be built-in with multiple condition receiving system in the STB, but can only use a kind of smart card in each STB, realize a kind of condition receiving system.Therefore, need be according to the type of the condition receiving system under the current smart card, call general-purpose interface function pair and the corresponding condition receiving system of current smart card need with the correlation function module carry out initialization.
Wherein, under judging current smart card, during the type of condition receiving system, can judge with the card sign according to the card host-host protocol of current smart card.Set-top-box system can reset to the smart card that inserts, and knows the card transport protocol type, knows the card sign according to the return data that resets, thereby just can judge that this smart card is the smart card that belongs to which CA system.
After the type of judging the condition receiving system under the current smart card; Set-top-box system will call the general-purpose interface function automatically the corresponding functional module of condition receiving system will be carried out initialization, comprise the initialization setting of intelligent card initialization, the initialization of OS adaptation layer, communication interface initialization, demultiplexing initialization and initialize memory etc.
S13: the setting general-purpose data structure, the data that the different condition receiving system is exported convert common data structure respectively into, offer the set-top box application program.
The various conditions receiving system is realizing mandate, mail; During related application such as fingerprint, IPPV, IPPT; The Entitlement Management Message data of after decryption processing, exporting all adopt from the own data structure of native system; The application program that is not easy to compatible multiple condition receiving system is used, and therefore, the condition receiving system implantation method of this embodiment has been set a common data structure; All convert the data of different condition receiving system output into application program that this common data structure form offers STB, make things convenient for application program to use.
Through defining above-mentioned general-purpose interface function and common data structure, the STB resource is carried out unified management, made things convenient for the transplanting of different condition receiving system, realized compatibility.
The method that receives at realization condition in the STB of the multiple condition receiving system of compatibility shown in the embodiment of Fig. 2, the method that the condition receiving method of this embodiment is transplanted based on the compatible multiple condition receiving system of Fig. 1, its idiographic flow is following:
S21: set-top box application procedure triggers condition receives, and calls the general-purpose interface function condition receiving system is carried out initialization.
In this embodiment; The set-top box application program that trigger condition receives can be the program that the user changes the platform operation in the playing programs process; Or switch the program of frequency operation for the user; Or the program of monitoring front-end business information data version variation, wherein, the variation of front-end business information data version is meant that mainly variation has taken place the data of program table PMT and CAT Conditional Access Table CAT.As long as wherein there is a program to satisfy trigger condition, the condition of can sending receives the request trigger condition and receives.After trigger condition receives, application program will be called the general-purpose interface function condition receiving system will be carried out initialization, and general-purpose interface function and initialization setting can be with reference to the descriptions of above-mentioned Fig. 1.
S22: call general-purpose interface function from TS stream, obtain the authorization control information and Entitlement Management Message and buffer memory.
Here, mainly be to call the demultiplexing interface function TS stream that front end sends is filtered, obtain corresponding Entitlement Control Message (ECM) and Entitlement Management Message (EMM).Specifically, STB is described according to the CA of PMT and CAT table, obtains the PI D value of EMM and ECM, from TS stream, filters out ECM and EMM according to pid value then.For ECM that has a plurality of slot and EMM data, for avoiding loss of data, extracted the data of a slot on the backstage after, first allocating cache quene carries out buffer memory to ECM and the EMM data extracted.
S23: judging whether ECM and EMM data are obtained finishes.Finish execution in step S24 if obtain; If do not obtained, go to step S22 and continue to obtain.
S24: ECM and EMM data obtain finish after, through the general-purpose interface function ECM complete in the buffer memory and the corresponding smart card of EMM transfer of data to condition receiving system are carried out decryption processing.
The decryption processing process of smart card is: the individual subscriber distributing key PDK that smart card reads its stored, with PDK EMM is deciphered, and take out business cipher key SK; Then, with SK ECM is deciphered again, solve scrambling control word CW.Simultaneously, decrypting process can also obtain address, the authorized user message that EMM comprises, and like program or the time period that the user can see, the information such as license fee that the user pays are to realize the associated authorization management.
S25: the scrambling control word after the decryption processing is offered descrambler through the general-purpose interface function, the audio/video flow of encrypting is carried out descrambling.
S26: with other Entitlement Control Message data and the Entitlement Management Message data after the decryption processing; Program information datas such as program source, time, classifying content and program price for example; Data transaction such as mail, fingerprint is a common data structure, offers the set-top box application program.Here; Other Entitlement Control Message data are meant ECM deciphering back other information datas except that the scrambling control word; These packets contain program information datas such as program source, time, classifying content and program price, need offer the set-top box application program and use.And in Entitlement Management Message data EMM; Not only include management information data such as mail, fingerprint; Also may comprise the program information datas such as program source, time, classifying content of request programs such as IPPV, IPPT, these data also need offer the set-top box application program and use.
In this embodiment; Use, realize the distribution real-time of data for ease of application program; Data transaction behind the descrambling is a common data structure, offers the set-top box application program with call back function mode or message mode, accomplishes the descrambling and the relevant functions such as empowerment management of DTV.
Above embodiment is only in order to explaining technical scheme of the present invention, but not limits it; Although the present invention has been carried out detailed explanation with reference to previous embodiment, for the person of ordinary skill of the art, still can make amendment to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of relevant art scheme break away from the spirit and the scope of the present invention's technical scheme required for protection.
Claims (9)
1. the method that the multiple condition receiving system of compatibility is transplanted is characterized in that said method comprises the steps:
A1, in the STB program built-in some kinds of condition receiving systems, the function setting general-purpose interface function of the interface that will transplant according to all conditions receiving system offers the set-top box application program;
A2, judge the type of the condition receiving system under the current smart card, call general-purpose interface function pair and carry out initialization with the module that the corresponding condition receiving system of current smart card need be used;
A3, setting general-purpose data structure, the data that the different condition receiving system is exported convert common data structure respectively into, offer the set-top box application program;
Wherein, the said general-purpose interface function communication interface function, demultiplexing interface function and the data memory interface function that comprise OS adaptation layer interface function, communicate with smart card.
2. the method that the multiple condition receiving system of compatibility according to claim 1 is transplanted is characterized in that said general-purpose interface function also comprises the realizing interface function of release conditions receiving system function.
3. the method that the multiple condition receiving system of compatibility according to claim 1 and 2 is transplanted is characterized in that, in said step a2, judges the type of the condition receiving system under the current smart card according to the card host-host protocol and the card sign of current smart card.
4. the method that the multiple condition receiving system of compatibility according to claim 3 is transplanted; It is characterized in that; In said step a2, the initialization that the corresponding condition receiving system of current smart card is carried out comprises the initialization of OS adaptation layer, communication interface initialization, demultiplexing initialization and initialize memory.
5. condition receiving method, this method is characterized in that based on the method that aforesaid right requires the multiple condition receiving system of 1 described compatibility to transplant said condition receiving method comprises the steps:
B1, set-top box application procedure triggers condition receive, and call the general-purpose interface function condition receiving system is carried out initialization;
B2, call general-purpose interface function from TS stream, obtain the authorization control information and Entitlement Management Message, and transfer to the corresponding smart card of condition receiving system through the general-purpose interface function and carry out decryption processing;
B3, the scrambling control word after the decryption processing is offered descrambler through the general-purpose interface function, the audio/video flow of encrypting is carried out descrambling;
B4, be common data structure, offer the set-top box application program other Entitlement Control Message data and Entitlement Management Message data transaction after the decryption processing.
6. condition receiving method according to claim 5; It is characterized in that; In said step b2; Call the general-purpose interface function and from TS stream, obtain the authorization behind control information and the Entitlement Management Message, first buffer memory carries out decryption processing with complete Entitlement Control Message and Entitlement Management Message through the smart card that the general-purpose interface function transfers to the condition receiving system correspondence then.
7. according to claim 5 or 6 described condition receiving methods, it is characterized in that in said step b4, the Entitlement Management Message data transaction after the decryption processing is a common data structure, offers the set-top box application program with call back function mode or message mode.
8. condition receiving method according to claim 7; It is characterized in that; In said step b1, the set-top box application program that trigger condition receives comprises that program, user that user in the playing programs process changes the platform operation switch at least a in the program of frequency operation and the program that monitoring front-end business information data version changes.
9. condition receiving method according to claim 8; It is characterized in that; In said step b1, call the initialization that the general-purpose interface function carries out condition receiving system and comprise the initialization of OS adaptation layer, communication interface initialization, demultiplexing initialization and initialize memory.
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| CN104581318B (en) * | 2015-01-22 | 2017-11-17 | 青岛海信宽带多媒体技术有限公司 | Realize the method and terminal of smart card dynamic plug response |
| CN104883594A (en) * | 2015-06-04 | 2015-09-02 | 深圳市九洲电器有限公司 | Method and system for switching card CA (conditional access) and card-free CA of set-top box |
| CN105376619B (en) * | 2015-10-26 | 2019-03-19 | 广东海信宽带科技有限公司 | A kind of set-top box and the means of communication with smart card |
| CN106851391A (en) * | 2015-12-03 | 2017-06-13 | 国家新闻出版广电总局广播科学研究院 | A kind of condition receiving method and system for intelligent operating system |
| CN105554540B (en) * | 2015-12-31 | 2019-04-09 | 深圳国微技术有限公司 | The implementation method and device of a kind of network interface in condition receiving card |
| CN107592558B (en) * | 2017-06-09 | 2020-08-04 | 青岛海信宽带多媒体技术有限公司 | Interaction method and device for CA middleware in set top box |
| CN107343212B (en) * | 2017-07-19 | 2020-07-10 | 海信视像科技股份有限公司 | Descrambling method of digital television, digital television and CAM card |
| CN107645679B (en) * | 2017-09-30 | 2020-02-07 | 深圳市九洲电器有限公司 | Production method and system of card-free condition receiving system of set top box |
| CN108200453B (en) * | 2018-01-25 | 2020-10-02 | 国家新闻出版广电总局广播科学研究院 | Fusion condition receiving terminal system and method |
| CN108200476A (en) * | 2018-02-07 | 2018-06-22 | 深圳佳力拓科技有限公司 | The set-top-box system and method for a kind of while compatible multiple and different condition receiving systems |
| CN108683930B (en) * | 2018-04-27 | 2020-09-25 | 青岛海信传媒网络技术有限公司 | Digital television, initialization method and device of interface of digital television and readable storage medium |
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