CN101355642A - Digital television receiving terminal - Google Patents
Digital television receiving terminal Download PDFInfo
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- CN101355642A CN101355642A CNA200810211919XA CN200810211919A CN101355642A CN 101355642 A CN101355642 A CN 101355642A CN A200810211919X A CNA200810211919X A CN A200810211919XA CN 200810211919 A CN200810211919 A CN 200810211919A CN 101355642 A CN101355642 A CN 101355642A
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Abstract
The invention provides a receiving terminal for a digital television, comprising a local machine of the receiving terminal of the digital television, an SD card used for storing the application software used in the operation of the local machine of the receiving terminal of the digital television, and a connecting device which is arranged on the local machine of the receiving terminal of the digital television and is used for detachably connecting the SD card to the local machine of the receiving terminal of the digital television. The technical proposal improves the commonality of the terminal of the digital television and lowers the cost.
Description
Technical field
The present invention relates to digital TV field, relate more specifically to a kind of receiving terminal for digital television that can realize separation between machine and card.
Background technology
Current Digital Television (comprising hand held television) becomes 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.
(comprise hand held television in Digital Television, mobile TV for example) field, generally in the following ways: utilize the front end system of condition receiving system (ConditionalAccess System 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.
With reference to Fig. 1, 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.
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:
CAM (the Conditional Access Module) card of separation between machine and card mode one: DVB (Digital video Broadcasting) standard definition.Deposit the CAS agent software in the CAM card, descrambling is finished in the CAM card.Still needing to insert smart card in the CAM card could work.Pass through the DVB-CI interface communication between CAM card and the receiver.Standard similarly for the POD of the U.S. (Point of Deployment).In this mode, not only need the CAM card but also need smart card, cost is higher.
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 present invention is to provide a kind of receiving terminal for digital television of realizing separation between machine and card, be beneficial to improve the versatility of digital TV terminal receiver.
The invention provides a kind of receiving terminal for digital television, comprising: this machine of receiving terminal for digital television; The SD card, this machine that is used to store receiving terminal for digital television moves employed application software; And jockey, be arranged on this machine of receiving terminal for digital television, be used for the SD card detachably is connected to this machine of receiving terminal for digital television.
The SD card is inserted in the jockey of this machine of receiving terminal for digital television, application software transferred and moves by this machine of receiving terminal for digital television from the SD card, wherein application software comprises condition receiving system software, and condition receiving system software is used for the data that received by receiving terminal for digital television are carried out descrambling and deciphering.
In above-mentioned receiving terminal for digital television, jockey is the SD card, and the SD card comprises Mini SD card and Micro SD card, when the SD card is Mini SD card, the SD card is a Mini SD card, and when the SD card was Micro SD card, the SD card was the MicroSD card.
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.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
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 block diagram of receiving terminal for digital television according to an embodiment of the invention.
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 2 shows the block diagram of receiving terminal for digital television according to an embodiment of the invention, and with reference to Fig. 2, the receiving terminal for digital television among this embodiment comprises: this machine of receiving terminal for digital television 200; SD card 202, this machine that is used to store receiving terminal for digital television moves employed application software; And jockey 204, be arranged on this machine of receiving terminal for digital television, be used for SD card 202 detachably is connected to this machine 200 of receiving terminal for digital television.
In above-mentioned receiving terminal for digital television, jockey is the SD card, and SD card 202 comprises Mini SD card and Micro SD card, when SD card 202 is Mini SD card, the SD card is a Mini SD card, and when SD card 202 was Micro SD card, the SD card was a Micro SD card.
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.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and 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 protection scope of the present invention.
Claims (7)
1. a receiving terminal for digital television is characterized in that, comprising:
This machine of receiving terminal for digital television;
The SD card, this machine that is used to store described receiving terminal for digital television moves employed application software; And
Jockey is arranged on this machine of described receiving terminal for digital television, is used for described SD card detachably is connected to this machine of described receiving terminal for digital television.
2. receiving terminal for digital television according to claim 1, it is characterized in that, described SD card is inserted in the described jockey of this machine of described receiving terminal for digital television, and described application software is transferred and moved to this machine of described receiving terminal for digital television from described SD card.
3. receiving terminal for digital television according to claim 2 is characterized in that described application software comprises condition receiving system software.
4. receiving terminal for digital television according to claim 3 is characterized in that, described condition receiving system software is used for the data that received by described receiving terminal for digital television are carried out descrambling and deciphering.
5. receiving terminal for digital television according to claim 4 is characterized in that, described jockey is the SD card.
6. receiving terminal for digital television according to claim 5 is characterized in that, described SD card is a Mini SD card, and described SD card is a Mini SD card.
7. receiving terminal for digital television according to claim 5 is characterized in that, described SD card is a Micro SD card, and described SD card is a Micro SD card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810211919XA CN101355642A (en) | 2008-09-10 | 2008-09-10 | Digital television receiving terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810211919XA CN101355642A (en) | 2008-09-10 | 2008-09-10 | Digital television receiving terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101355642A true CN101355642A (en) | 2009-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810211919XA Pending CN101355642A (en) | 2008-09-10 | 2008-09-10 | Digital television receiving terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105516805A (en) * | 2016-01-14 | 2016-04-20 | 浪潮软件集团有限公司 | Method for starting APK based on external storage device and set top box |
| CN112218101A (en) * | 2019-07-11 | 2021-01-12 | 阿里巴巴集团控股有限公司 | Method, equipment and system for realizing live broadcast and on-demand broadcast functions |
-
2008
- 2008-09-10 CN CNA200810211919XA patent/CN101355642A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105516805A (en) * | 2016-01-14 | 2016-04-20 | 浪潮软件集团有限公司 | Method for starting APK based on external storage device and set top box |
| CN112218101A (en) * | 2019-07-11 | 2021-01-12 | 阿里巴巴集团控股有限公司 | Method, equipment and system for realizing live broadcast and on-demand broadcast functions |
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Open date: 20090128 |