CN1617583A - Digital signal condition receiving system - Google Patents
Digital signal condition receiving system Download PDFInfo
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- CN1617583A CN1617583A CN 200310112088 CN200310112088A CN1617583A CN 1617583 A CN1617583 A CN 1617583A CN 200310112088 CN200310112088 CN 200310112088 CN 200310112088 A CN200310112088 A CN 200310112088A CN 1617583 A CN1617583 A CN 1617583A
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- digital signal
- condition receiving
- receiving system
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Abstract
A digital signal condition receiving system includes a send end a cable transmitting signals and a terminal receiving and displaying them. The front end disturbing and ciphering system added at the sending end includes a signal analysis server SAS, an expanded memory manager EMM, a digital video broadcast DVB and electronic cipher code memory to transmit after disturbing and ciphering broadcast programs, a de-cipher system is added between the cable and the terminal used in user intelligent card to decipher the user authorization information generated by EMM and the ciphered information by ECM and judges if said user has the right to watch the program or program sets to determine if necessary to solve the input disturbed and ciphered digital signals.
Description
Technical field the present invention relates to electrical communication technology, particularly the restriction receiving system of digital broadcasting communication.
Background technology is not having before the service condition receiving system, and digital broadcast signal can be received by Any user termination receiving unit.The commercial interest of broadcast operator can not get protection; the rights and interests of content supplier; the copyright that comprises film and TV play; the copyright of sports cast; copyright of then educational programs or the like; all can not get effective protection,, do not watch broadcasted content handing under the situation of license fee because the user can at will buy receiving equipment on market.
Summary of the invention the objective of the invention is to prevent illegally to watch broadcast program, the legitimate commercial interest of protection operator and content supplier.
The present invention realizes by implementing following technical scheme: design a kind of digital signal condition receiving system, comprise the cable of digital signal transmitting terminal, transmission of digital signals and receiving digital signals and the terminal that shows; Be equipped with front end scrambling encryption system at the digital signal transmitting terminal, this front end scrambling encryption system comprises signal analysis server S AS, is mainly used in the information that reads that generates authorized user message and user smart card; The authorized user message that signal analysis server S AS generates is delivered to extended-memory manager EMM, extended-memory manager EMM is responsible for all information is ranked, and all EMM information are delivered to digital video broadcasting DVB and electronic cipher device ECM, broadcast program is carried out scrambling, and will transmit after the control word encryption; Between cable and terminal, add decryption system, be used for user smart card, the authorized user message that extended-memory manager EMM is generated and and the enciphered message that produces of electronic cipher device ECM be decrypted, and judge whether this user has the right to watch a certain program or program set, will be according to the agreement between user and the operator, definite digital signal open or that refusal will receive is imported.
It is scrambling system and authoring system that the digital signal condition receiving system can roughly be divided into two parts.Wherein the major function of front end scrambling encryption system is that digital content is carried out scrambling and encryption.Whole scrambling process is utilized the scrambling key, or claims control word (Control Word abbreviates CW as) to finish.According to international rule, the scrambling algorithm of standard should be the algorithm of symmetry, by the mode of broadcasting control word is delivered to the set-top box of user side in broadcast head end.And the main effect of encryption system is the scrambling of control front end, and whether the user of identification user side has the right to receive this content.In general, generally be in user smart card, to realize at the encryption system of user terminal, smart card provides a secure environment that prevents from reliably to destroy.Control word (CW) broadcast head end with ECM information protection get up the back and digital broadcasting stream deliver in the subscriber computer top box from broadcast head end together.After arriving set-top box, smart card is decrypted ECM information, and the information that will separate out then and exist the information in the smart card to compare is to determine whether two information conform to.If conform to, smart card is just delivered to control word in the set-top box, is solved to control word deciphering and with the broadcasting code stream of numeral by set-top box.To the mandate of user smart card, finish by EMM information.EMM information has comprised that the channel that the user bought is with product, relevant service parameter, authorization message, the commencement date and deadline that comprises mandate and the update date of mandate and encrypt used key or the like.In broadcast head end, after all these EMM information are encrypted, EMM information is passed to some users' smart card, smart card will be finished deciphering automatically and authorize after receiving correct EMM information program.EMM information can be at some smart cards, also can be at a certain group of smart card.
Adopt technical scheme of the present invention, the first, for the restriction of program authority, broadcast operator is watched some program with the user that condition receiving system limits a certain group of user or a certain area.The second, broadcast operator is utilized condition receiving system, increases the operation income by the user being imposed effectively license fee.The 3rd, prevent from illegally to watch broadcast program, the legitimate commercial interest of protection operator and content supplier.
Description of drawings
Fig. 1 is the operation principle schematic diagram of digital signal condition receiving system of the present invention.
Fig. 2 is the operation principle schematic diagram of the scrambling of front end described in Fig. 1 encryption system 3.
Fig. 3 is the operation principle schematic diagram of the transmitting terminal of digital signal described in Fig. 1 (5).
Embodiment is that example specifies embodiments of the invention below in conjunction with accompanying drawing and with CONAX CAS5 type digital signal condition receiving system.
By among Fig. 1 to Fig. 3 as can be known, a kind of digital signal condition receiving system comprises the cable 1 of digital signal transmitting terminal 5, transmission of digital signals and receiving digital signals and the terminal 2 that shows; Be equipped with front end scrambling encryption system 3 at digital signal transmitting terminal 5, this front end scrambling encryption system 3 comprises signal analysis server 31SAS, is mainly used in generation authorized user message and user smart card 4 and reads information; The authorized user message that signal analysis server 31SAS generates is delivered to extended-memory manager 32EMM, extended-memory manager 32 is responsible for all information are ranked, and all EMM information are delivered to digital video broadcasting 33DVB and electronic cipher device 34ECM, broadcast program is carried out scrambling, and will transmit after the control word encryption; Between cable 1 and terminal 2, add decryption system 6, be used for user smart card 4, the authorized user message that extended-memory manager 32EMM is generated and and the enciphered message that produces of electronic cipher device 34ECM be decrypted, and judge whether this user has the right to watch a certain program or program set, will be according to the agreement between user and the operator, definite digital signal open or that refusal will receive is imported.It is scrambling system and authoring system that the digital signal condition receiving system can roughly be divided into two parts.Wherein the major function of front end scrambling encryption system 3 is that digital content is carried out scrambling and encryption.Whole scrambling process is utilized the scrambling key, or claims control word (Control Word abbreviates CW as) to finish.According to international rule, the scrambling algorithm of standard should be the algorithm of symmetry, by the mode of broadcasting control word is delivered to the set-top box of user side in broadcast head end.And the main effect of encryption system is the scrambling of control front end, and whether the user of identification user side has the right to receive this content.In general, generally be in 4 li realizations of user smart card at the encryption system of user terminal, user smart card 4 provides a secure environment that prevents from reliably to destroy.
Control word (CW) broadcast head end with ECM information protection get up the back and digital broadcasting stream deliver in the subscriber computer top box from broadcast head end together.After arriving set-top box, smart card is decrypted ECM information, and the information that will separate out then and exist the information of 4 li of user smart cards to compare is to determine whether two information conform to.If conform to, user smart card 4 is just delivered to control word in the set-top box, is solved to control word deciphering and with the broadcasting code stream of numeral by set-top box.To the mandate of user smart card 4, finish by EMM information.EMM information has comprised that the channel that the user bought is with product, relevant service parameter, authorization message, the commencement date and deadline that comprises mandate and the update date of mandate and encrypt used key or the like.In broadcast head end, after all these EMM information are encrypted, EMM information is passed in some user smart cards 4 user smart card 4 will be finished deciphering automatically and authorize after receiving correct EMM information program.EMM information can be at some smart cards, also can be at a certain group of smart card.
By among Fig. 3 as can be known, native system digital signal transmitting terminal 5 also includes live module 51PPV, is used to protect the live broadcast of the higher program of commercial value.Native system digital signal transmitting terminal 5 also includes:
Video request program module 52 is used to protect the broadcasting of video request program combinations of channels or the relay of popular program;
Software download administration module 55 is used for the broadcast of supervisor top box upgrade software;
Remote data access module 56 is used for the broadcast of supervising the network message transmission;
Computerized information interface module (57);
The kit of operator (58) is used to run and monitor large complicated condition receiving system.
Claims (9)
1. digital signal condition receiving system comprises the cable (1) of digital signal transmitting terminal (5), transmission of digital signals and receiving digital signals and the terminal (2) that shows; It is characterized in that: be equipped with front end scrambling encryption system (3) at digital signal transmitting terminal (5), this front end scrambling encryption system (3) comprises signal analysis server (31) SAS, is mainly used in generation authorized user message and user smart card (4) and reads information; The authorized user message that signal analysis server (31) SAS generates is delivered to extended-memory manager (32) EMM, extended-memory manager (32) EMM is responsible for all information is ranked, and all EMM information are delivered to digital video broadcasting (33) DVB and electronic cipher device (34) ECM, broadcast program is carried out scrambling, and will transmit after the control word encryption; Between cable (1) and terminal (2), add decryption system (6), be used for user smart card (4), the authorized user message that extended-memory manager (32) EMM is generated and and the enciphered message of electronic cipher device (34) ECM generation be decrypted, and judge whether this user has the right to watch a certain program or program set, will be according to the agreement between user and the operator, determine whether to crack the digital signal of the scrambling and the encryption of input.
2. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes live module (51) PPV, is used to protect the live broadcast of the higher program of commercial value.
3. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes video request program module (52), is used to protect the broadcasting of video request program combinations of channels or the relay of popular program.
4. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes interactive application module (53), is used to protect interactive application.
5. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes administration module (54), is used to manage the broadcast of EIT table.
6. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes software download administration module (55), is used for the broadcast of supervisor top box upgrade software.
7. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes remote data access module (56), is used for the broadcast of supervising the network message transmission.
8. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes computerized information interface module (57).
9. according to the described digital signal condition receiving system of claim 1, it is characterized in that: native system digital signal transmitting terminal (5) also includes the kit (58) of operator, is used to run and monitor large complicated condition receiving system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112088 CN1617583A (en) | 2003-11-11 | 2003-11-11 | Digital signal condition receiving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112088 CN1617583A (en) | 2003-11-11 | 2003-11-11 | Digital signal condition receiving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1617583A true CN1617583A (en) | 2005-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310112088 Pending CN1617583A (en) | 2003-11-11 | 2003-11-11 | Digital signal condition receiving system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949862B (en) * | 2005-10-13 | 2010-09-29 | 三星电子株式会社 | Digital broadcasting conditional access system and method thereof |
| CN101437143B (en) * | 2007-11-16 | 2011-05-25 | 聪泰科技开发股份有限公司 | Encipher apparatus for image and sound transmission |
| CN101646060B (en) * | 2009-09-04 | 2011-06-22 | 四川虹微技术有限公司 | Protecting method of data content in storage device |
-
2003
- 2003-11-11 CN CN 200310112088 patent/CN1617583A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949862B (en) * | 2005-10-13 | 2010-09-29 | 三星电子株式会社 | Digital broadcasting conditional access system and method thereof |
| CN101437143B (en) * | 2007-11-16 | 2011-05-25 | 聪泰科技开发股份有限公司 | Encipher apparatus for image and sound transmission |
| CN101646060B (en) * | 2009-09-04 | 2011-06-22 | 四川虹微技术有限公司 | Protecting method of data content in storage device |
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