CN201611927U - Master/auxiliary card for digital television conditional access system - Google Patents
Master/auxiliary card for digital television conditional access system Download PDFInfo
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- CN201611927U CN201611927U CN2009202774340U CN200920277434U CN201611927U CN 201611927 U CN201611927 U CN 201611927U CN 2009202774340 U CN2009202774340 U CN 2009202774340U CN 200920277434 U CN200920277434 U CN 200920277434U CN 201611927 U CN201611927 U CN 201611927U
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Abstract
The utility model provides a master/auxiliary card for a digital television conditional access system. The master card comprises a first control module, a RF module which is electrically connected with the first control module for receiving a pairing request from the auxiliary card and sending a master/auxiliary card pairing command to the auxiliary card, and a first processing module which is electrically connected with the first control module for generating the master/auxiliary card pairing command to the auxiliary card according to the pairing request. The auxiliary card comprises a second control module, a second RF module which is electrically connected with the second control module for sending the pairing request to the master card, and a second processing module which is electrically connected with the second control module for implementing the received master/auxiliary card pairing command from the master card and acquiring the authority of decrypting authorization control information. The master card is communicated with the auxiliary card in a wireless manner.
Description
Technical field
The utility model relates to digital TV field, in particular to a kind of child and parent card that is used for digital television conditional access system.
Background technology
Digital television conditional access system is meant that broadcasting front end in Digital Television uses control word (CW) that the digital video-audio and the data of program are carried out scrambling, then CW is sent to terminal (usually with the ECM data packet form of encrypting along with looking audio frequency transmission streaming, in the certain hour section, the corresponding CW of one programs, just corresponding ECM packet).Terminal set top box is analyzed transmitting stream, obtain own current ECM (the Entitlement Control Message that watches the program correspondence, Entitlement Control Message) packet, utilize digital TV conditional to receive smart card deciphering ECM packet then, thereby obtain CW, digital video-audio and data that set-top box uses CW to decipher this program realize the Conditional Access to Digital Television.
Operator is that unit charges with the digital TV conditional receiving terminal normally, and a television set just needs a receiving terminal (comprising that a set-top box and a digital television condition receive smart card).In the reality operation, one family sometimes may have multiple TV set, be assumed to be N, so just need N digital TV conditional receiving terminal, if also charge according to original charging policy, then the user need pay N doubly to the license fee usefulness of using single receiving terminal, may cause the reduction of customer consumption wish like this.Digital-TV operator is in order to promote Digital Television better, can use preferential that the situation of a plurality of receiving terminals gives that license fee uses to a client usually.The user that a plurality of receiving terminals are promptly arranged for a this family, operator takes one of them receiving terminal (being called master card) is charged according to Standard Rate, give the charging policy of certain discount for remaining terminal (being called subcard), to encourage customer consumption, this kind operation way is commonly referred to the child and parent card mode.For example: every month license fee of single receiving terminal is 18 yuan, user's family has 2 TVs, need 2 receiving terminals, if collecting license fee separately according to each terminal uses, then the user needed every month to pay 36 yuan, if adopt the child and parent card mode, the every charge per month of subcard is 9 yuan, and then the user uses two terminals only need pay 27 yuan license fee usefulness in every month.
Under the child and parent card mode of one family multiterminal, each terminal all needs legal condition reception intelligent card, that is to say that each terminal all has the ability of independent deciphering ECM, but whether subcard can decipher ECM, is controlled by master card.The child and parent card workflow is generally: be responsible for parses transport stream separately by each terminal, according to the ECM packet of the program filtering program correspondence of selecting, whether each subcard terminal inspection oneself is current the authority of deciphering ECM, if having then directly ECM is deciphered, obtain CW, program is carried out descrambling; If do not decipher the authority of ECM, then need obtain to decipher the ECM authority by set-top box prompting user.The authority of subcard deciphering ECM is controlled by the mode that requires to match by master card.The child and parent card mode is the family multiterminal implementation that operator adopts usually.
The implementation of existing child and parent card matching technology is: when subcard and master card are carried out operator's personalization, in the middle of master card, preserve its master card identify label and pairing rules, in subcard, preserve its subcard identify label, corresponding master card information and pairing threshold value (blanking time or deciphering number of times), then subcard and master card are distributed to user's use.In the time of the pairing of subcard prompting need carrying out child and parent card, subcard and master card must be focused on a place, utilize set-top box to implement pairing as transfer of data intermediary.During pairing, at first need subcard insertion machine top box, the set-top box prompting need be carried out the child and parent card pairing, extracts subcard according to prompting then, inserts the master card of this subcard correspondence, set-top box reads the interior master card identify label of master card and the pairing rules of ciphertext, what confirm insertion is the master card of this subcard correspondence, and then subcard is inserted in prompting once more according to set-top box, after set-top box is confirmed to be the subcard of this master card, the pairing threshold value of change subcard makes subcard can continue to watch.It should be noted that child and parent card identify label, child and parent card corresponding informance and pairing rules and pairing threshold value have measure and ensure safety such as password and timestamp usually in access, modification and transmission, can prevent illegal modifications and Replay Attack.
In realizing the utility model process, the inventor finds that the pairing of the child and parent card implementation of prior art has following shortcoming:
When (1) child and parent card matched, subcard and master card must focus on a place, and subcard and master card need plug once separately at least, and the program that influences watching of program, particularly master card is watched;
(2) in child and parent card when pairing,, operating process is loaded down with trivial details, and automaticity is not high, and whole process all needs the user to operate in person, and user experience is relatively poor;
(3) because matching operation loaded down with trivial details, the pairing threshold value of child and parent card can not be provided with very for a short time usually, need carry out the child and parent card pairing continually to prevent the user, has reduced the restriction of pairing function for the applications distances of subcard and master card like this.
The utility model content
The utility model aims to provide a kind of child and parent card that is used for digital television conditional access system, and the program that influences that can solve the prior art existence is watched, and the loaded down with trivial details problems such as problem of operating process.
In embodiment of the present utility model, a kind of child and parent card that is used for digital television conditional access system is provided, master card comprises: first control module; And
The one RF module, it is electrically connected with first control module, is used to receive the pairing request from subcard; Also be used for child and parent card pairing order is sent to subcard;
First processing module, it is electrically connected with first control module, and being used for according to pairing request is that subcard generates child and parent card pairing order;
Subcard comprises: second control module; And
The 2nd RF module, it is electrically connected with second control module, is used for sending pairing request to master card;
Second processing module, it is electrically connected with second control module, is used to carry out the child and parent card pairing order from master card that receives, and obtains the authority of decrypt authorized control information;
Wherein, master card and subcard communicate by wireless mode.
Preferably, master card lays respectively at different receiving terminals with subcard.
Preferably, first processing module also is used for preserving in advance master card identify label and pairing rules; Also be used to subcard to generate the child and parent card pairing order of encryption;
First control module is used for the pairing request that a RF module receives is transferred to first processing module; The child and parent card pairing order that also is used for encryption that first processing module is generated is transferred to a RF module and is sent;
The child and parent card pairing order that the one RF module also is used for encrypting sends to subcard;
Second processing module also is used for preserving in advance subcard identify label, corresponding master card information and the threshold value of matching, and the pairing threshold value comprises the child and parent card pairing time interval and/or deciphering number of times; Also be used for when judging that number of times that time that subcard independently uses will surpass or surpass the child and parent card pairing time interval and/or the control information of subcard decrypt authorized will surpass or when deciphering number of times, sending the pairing prompting message to second control module; Also be used for judging that according to the master card information of correspondence the child and parent card pairing order of encrypting comes from the master card of correspondence, and the child and parent card pairing order of encrypting is decrypted, carry out the child and parent card pairing order after deciphering, obtain the authority of decrypt authorized control information again;
Second control module also is used for sending pairing request by the 2nd RF module to master card according to the pairing prompting message;
The 2nd RF module also is used to receive the child and parent card pairing order from the encryption of master card, and transfers to second processing module by second control module.
Preferably, first control module also is used for the order of the modification transmitting power that the front end according to digital television conditional access system issues, and adjusts the transmitting power of a RF module;
Second control module also is used for the order of the modification transmitting power that the front end according to digital television conditional access system issues, and adjusts the transmitting power of the 2nd RF module.
Preferably, first processing module and second processing module are intelligent card chip.
Preferably, first control module and second control module are micro-control unit, and micro-control unit is central controller, field programmable gate array or programmable logic device.
Preferably, a RF module and the 2nd RF module include: RF transceiving chip and RF antenna.
Preferably, micro-control unit also is used for the communication data between transfer receiving terminal and the intelligent card chip; Also be used to control communicating by letter between intelligent card chip and the RF chip; Also be used for configuration and control RF chip.
Preferably, micro-control unit communicates by serial peripheral interface and RF chip.
Preferably, master card and subcard are printed circuit board (PCB), and the width of printed circuit board (PCB) and gauge meet in the ISO7816 agreement requirement about smart card.
Preferably, master card and subcard all also comprise: link, and it is electrically connected with intelligent card chip, micro-control unit and RF transceiving chip, and link is used for being electrically connected with receiving terminal.
Because the mode by radio communication realizes the pairing between master card and the subcard, thereby make subcard can regain the authority of decrypt authorized control information, the program that influences that has solved the prior art existence is watched, and the problem that operating process is loaded down with trivial details, thereby can not change master card and subcard and normally use master card and subcard to watch under the prerequisite of program, make master card and subcard finish pairing automatically, thereby make subcard regain the authority of decrypt authorized control information.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows the schematic block diagram according to the child and parent card that is used for digital television conditional access system of the utility model embodiment;
Fig. 2 shows the schematic block diagram according to the child and parent card of the utility model preferred embodiment;
Fig. 3 shows the concrete structure schematic block diagram according to the child and parent card of the utility model preferred embodiment.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 1 shows the schematic block diagram according to the child and parent card that is used for digital television conditional access system of the utility model embodiment.
As shown in Figure 1, master card 10 comprises: first control module 103; And
The one RF module 101, it is electrically connected with first control module 103, is used to receive the pairing request from subcard 20; Also be used for child and parent card pairing order is sent to subcard 20;
Subcard 20 comprises: second control module 203; And
The 2nd RF module 201, it is electrically connected with second control module 203, is used for sending pairing request to master card 10;
Wherein, master card 10 and subcard 20 communicate by wireless mode.
Among this embodiment, master card 10 is positioned at different receiving terminals with subcard 20.Because the mode by radio communication realizes the pairing between master card and the subcard, need not subcard and master card are plugged, and like this, can not influence under the prerequisite of normally watching program at constant mover card and master card, makes master card and subcard finish pairing automatically.
In addition, master card of the present utility model and subcard are finished the pairing process automatically, need not to remind the user need carry out the child and parent card matching operation, need not the user and manually master card and subcard are plugged and cooperate the child and parent card pairing process of finishing.
Preferably, first processing module 102 also is used for preserving in advance master card identify label and pairing rules; Also be used to subcard 20 to generate the child and parent card pairing order of encryption;
The child and parent card pairing order that the one RF module 101 also is used for encrypting sends to subcard 20;
The 2nd RF module 201 also is used to receive the child and parent card pairing order from the encryption of master card 10, and transfers to second processing module 202 by second control module 203.
The preferred embodiment is because the mode by radio communication realizes the pairing between master card and the subcard, thereby make subcard can regain the authority of decrypt authorized control information, the program that influences that has solved the prior art existence is watched, and the loaded down with trivial details problem of operating process.Use this embodiment to make master card and subcard finish pairing automatically, thereby to make subcard regain the authority of decrypt authorized control information not changing master card and subcard and normally using master card and subcard to watch under the prerequisite of program.This embodiment realized in digital television conditional access system, and family multiterminal were used when terminal received manageability and convenience provide a kind of implementation of family multiterminal (child and parent card) function in digital television conditional access system.
In addition, by finishing the pairing process between master card and the subcard independently, whole pairing process need not set-top box and participates in this embodiment, therefore, can not be subjected to the upgrading of set-top box or the influence of replacing, also can not bring any influence to the service behaviour of set-top box fully.
Preferably, first control module 103 also is used for the order of the modification transmitting power that the front end according to described digital television conditional access system issues, and adjusts the transmitting power of a RF module 101; Second control module 203 also is used for the order of the modification transmitting power that the front end according to described digital television conditional access system issues, and adjusts the transmitting power of the 2nd RF module 201.Can make modification to the applications distances of child and parent card like this, thereby adapt to different situations.
Can also adjust the transmitting power of master card and subcard by transmitting order to lower levels by the preferred embodiment, thereby realize modification the applications distances of child and parent card.In addition, can also be in conjunction with the adjustment that realizes the restriction of child and parent card operating distance that is provided with to the child and parent card pairing time interval.
Fig. 3 shows the schematic block diagram according to the child and parent card of the utility model preferred embodiment, and the structure of master card and subcard is identical.During work, need to be inserted in master card and subcard on the smart card of set-top box deck respectively or to be inserted in the digital TV terminal.
Preferably, as shown in Figure 3, first processing module 102 and second processing module 202 are intelligent card chip.Can use existing digital TV conditional to receive smart card and realize, make the functional and fail safe of service application be not less than existing systems.
As shown in Figure 2, a RF module 101 and the 2nd RF module 201 include: RF transceiving chip and RF antenna.
Wherein, micro-control unit also is used for the communication data between transfer receiving terminal and the intelligent card chip; Also be used to control communicating by letter between intelligent card chip and the RF chip; Also be used for configuration and control RF chip.Micro-control unit communicates by serial peripheral interface and RF chip.
Master card and subcard can be printed circuit board (PCB) (PCB), and the width of this printed circuit board (PCB) and gauge should meet in the ISO7816 agreement requirement about smart card.Each master card, element on master card and the subcard all are integrated on the PCB.Like this, child and parent card of the present utility model can directly be applied on the existing receiving terminal, as using on the deck that can directly be inserted in existing intelligent card of set-top box.
As shown in Figure 3, master card 10 and subcard 20 all also comprise: link 104, and it is electrically connected with intelligent card chip, micro-control unit and RF transceiving chip, and link is used for being electrically connected with receiving terminal.With after receiving terminal is electrically connected, receiving terminal provides power supply and clock by this link for intelligent card chip, micro-control unit and RF transceiving chip, and carries out data communication by this link and MCU.Link 104 is hard contacts that meet 7816 agreements.
As shown in Figure 3, the utility model proposes a kind of wireless mode that uses and realize the scheme that child and parent card is used.In this programme, subcard adopts identical structure with master card, subcard and master card are by MCU (Micro Control Unit, micro-control unit, claim one chip microcomputer or single-chip microcomputer again), digital TV conditional receives smart card and RF module (comprising RF transceiving chip and RF antenna) is formed, wherein the digital TV conditional receiving function receives the smart card realization by existing digital TV conditional fully, makes the functional and fail safe of service application be not less than existing systems; MCU is responsible for communicating by letter of transfer smart card and set-top box and control smart card and RF module, and MCU is also responsible simultaneously to be configured and to control the RF module; The RF module is responsible for the communication of unpaired message between subcard and the master card.
This programme is based on traditional child and parent card realization mechanism, its matching method is improved, main design thought is: utilize MCU as main control module, with adopt smart card communicate by letter with set-top box identical communication protocol and command interface during set-top box is communicated by letter, guarantee to it seems that from set-top box what communicate with only still is original condition reception intelligent card.MCU realizes mutual with set-top box by the relevant interface that calls intelligent card chip, finishes the every function of digital television conditional access system except that the child and parent card pairing.
As shown in Figure 3, in the specific implementation, use PCB to replace original digital TV conditional to receive smart card, integrated above-mentioned MCU, digital TV conditional receive intelligent card chip and RF transceiving chip and RF antenna on PCB.Wherein the width of PCB and thickness will meet in the ISO7816 agreement requirement for smart card width and thickness, and the length outline is longer than in the ISO7816 agreement for the requirement of smart card length, is used to arrange each chip and outside RF antenna.
Adopt MCU as master control in the child and parent card of the present utility model, on the one hand, MCU is responsible for realizing 7816 agreements, as the data relay between condition reception intelligent the core of the card sheet and the intelligent card of set-top box deck; On the other hand, configuration RF transceiving chip when MCU is responsible for powering on, the read-write sequence of realization RF transceiving chip carries out exchanges data etc. with the RF transceiving chip.When moving as master card, MCU is responsible for receiving the subcard pairing request that the RF transceiving chip is received, the paired data of the encryption that master card is generated is transferred to the RF transceiving chip by SPI (serial peripheral interface) interface and sends to subcard then.When moving as subcard, MCU is responsible for the pairing request of subcard is sent to master card by the RF transceiving chip, the paired data that the RF transceiving chip is received sends to the processing of subcard condition reception intelligent the core of the card sheet then, makes subcard and master card realize pairing, and subcard can continue to decipher the ECM packet.From subcard initiate pairing request to subcard receive the pairing of master card order whole process by the MCU of subcard and master card automatically control finish, the program that does not influence subcard and master card is watched.
The power supply and the clock of MCU, intelligent card chip, RF transceiving chip provide by the set-top box deck.Wherein intelligent card chip uses existing digital TV conditional to receive the form realization that intelligent card chip is changed encapsulation; MCU can also can be FPGA for the central controller of special use; The transmitting power of RF module should be adjustable.
The pairing handling process of describing child and parent card in the utility model according to preferred embodiment as shown in Figure 3 in detail may further comprise the steps:
Step 1, when subcard and master card are carried out operator's personalization, in the middle of the condition reception intelligent the core of the card sheet of master card, preserve its master card identify label and pairing rules, in the condition reception intelligent the core of the card sheet of subcard, preserve its subcard identify label, corresponding master card information and pairing threshold value (time interval of child and parent card pairing and/or deciphering number of times), then subcard and master card are distributed to user's use;
Step 2, condition reception intelligent card on the subcard in the child and parent card system finds to arrive its pairing threshold value (time interval and/or the deciphering number of times that surpass the child and parent card pairing), in the time of need matching with master card, send the prompting that needs pairing to its MCU, the MCU of subcard sends pairing request by its RF module (i.e. the 2nd RF module) to master card;
Step 3, after the RF module of master card (i.e. a RF module) is received this pairing request, the condition reception intelligent of giving master card with the pairing request of the subcard MCU by master card sticks into row and handles, the child and parent card pairing command packet of timestamp is encrypted and had to the condition reception intelligent card of master card for this subcard generates, give its RF module (i.e. a RF module) via the MCU of master card and send to the subcard that application is matched;
Step 4, the subcard of application pairing receives after master card sends to its pairing command packet, the condition reception intelligent of transferring to subcard by the MCU of subcard sticks into row and handles, the condition reception intelligent card of subcard judges at first whether this order comes from own corresponding master card, after confirming to one's name corresponding master card, deciphering is also carried out child and parent card pairing order, obtains the authority of deciphering ECM again;
Wherein, digital television conditional access system can be revised the transmitting power of the RF module (i.e. a RF module and the 2nd RF module) of child and parent card at the front end transmitting order to lower levels, is used for the applications distances of child and parent card is made modification.By to the adjustment of RF modular power in conjunction with pairing setting at interval, realize adjustment to the restriction of child and parent card operating distance.
The utility model uses the mode of radio communication to realize that the child and parent card of digital TV conditional receiving terminal matches automatically, and need not set-top box and participate in, be a kind of improvement to traditional child and parent card scheme.Master card in the utility model and subcard are on the basis of the function that all has deciphering ECM data separately, can under the situation of operate as normal, realize pairing, and need not the participation of set-top box, can not be subjected to the influence of set-top box, also can not influence the work and the performance of set-top box simultaneously.In addition, because the master card in the utility model structurally is identical with subcard, can change the role between subcard and the master card.
As can be seen from the above description, the utility model has been realized following technique effect:
When (1) child and parent card matched, subcard and master card need not focus on a place, and the pairing of subcard and master card can not influence watching of program;
When (2) child and parent card matched, whole process was finished automatically, need not the third party and participated in, and the user is even with the existence of knowing the pairing process, better user experience;
(3) because the child and parent card pairing is finished automatically, do not influence the rating of subcard and master card, the pairing threshold value can be provided with very for a short time, is convenient to the operating distance of siding stopping master card;
Data when (4) child and parent card matches receive smart card by digital TV conditional and generate, and do not have any relation with set-top box, and whole process is transparent for set-top box, is not subjected to the influence of set top box upgrading or replacing, and agreement is secret, safe.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (11)
1. a child and parent card that is used for digital television conditional access system is characterized in that,
Master card comprises: first control module; And
The one RF module, it is electrically connected with described first control module, is used to receive the pairing request from subcard; Also be used for child and parent card pairing order is sent to described subcard;
First processing module, it is electrically connected with described first control module, and being used for according to described pairing request is that described subcard generates child and parent card pairing order; Described subcard comprises: second control module; And
The 2nd RF module, it is electrically connected with described second control module, is used for sending pairing request to described master card;
Second processing module, it is electrically connected with described second control module, is used to carry out the child and parent card pairing order from described master card that receives, and obtains the authority of decrypt authorized control information;
Wherein, described master card and described subcard communicate by wireless mode.
2. child and parent card according to claim 1 is characterized in that, described master card lays respectively at different receiving terminals with described subcard.
3. child and parent card according to claim 1 is characterized in that,
Described first processing module also is used for preserving in advance master card identify label and pairing rules; Also be used to described subcard to generate the child and parent card pairing order of encryption;
Described first control module is used for the described pairing request that a described RF module receives is transferred to described first processing module; The child and parent card pairing order that also is used for encryption that described first processing module is generated is transferred to a described RF module and is sent;
A described RF module also is used for the child and parent card pairing order of described encryption is sent to described subcard;
Described second processing module also is used for preserving in advance subcard identify label, corresponding master card information and the threshold value of matching, and described pairing threshold value comprises the child and parent card pairing time interval and/or deciphering number of times; Also be used for when judge time that described subcard independently uses will surpass or surpass the described child and parent card pairing time interval and/or the control information of described subcard decrypt authorized number of times will above or during above described deciphering number of times, send the pairing prompting message to described second control module; Also be used for judging that according to the master card information of described correspondence the child and parent card pairing order of encrypting comes from corresponding master card, and the child and parent card of described encryption pairing order is decrypted, carry out the child and parent card pairing order after deciphering, obtain the authority of decrypt authorized control information again;
Described second control module also is used for sending described pairing request by described the 2nd RF module to described master card according to described pairing prompting message;
Described the 2nd RF module also is used to receive the child and parent card pairing order from the encryption of described master card, and transfers to described second processing module by described second control module.
4. child and parent card according to claim 3 is characterized in that,
Described first control module also is used for the order of the modification transmitting power that the front end according to described digital television conditional access system issues, and adjusts the transmitting power of a described RF module;
Described second control module also is used for the order of the modification transmitting power that the front end according to described digital television conditional access system issues, and adjusts the transmitting power of described the 2nd RF module.
5. according to each described child and parent card of claim 1 to 4, it is characterized in that described first processing module and described second processing module are intelligent card chip.
6. child and parent card according to claim 5 is characterized in that, described first control module and described second control module are micro-control unit, and described micro-control unit is central controller, field programmable gate array or programmable logic device.
7. child and parent card according to claim 6 is characterized in that, a described RF module and described the 2nd RF module include: RF transceiving chip and RF antenna.
8. child and parent card according to claim 7 is characterized in that, described micro-control unit also is used for the communication data between transfer receiving terminal and the described intelligent card chip; Also be used to control communicating by letter between described intelligent card chip and the described RF chip; Also be used for configuration and control described RF chip.
9. child and parent card according to claim 7 is characterized in that, described micro-control unit communicates by serial peripheral interface and described RF chip.
10. child and parent card according to claim 1 is characterized in that, described master card and described subcard are printed circuit board (PCB), and the width of described printed circuit board (PCB) and gauge meet in the ISO7816 agreement requirement about smart card.
11. child and parent card according to claim 7, it is characterized in that, described master card and described subcard all also comprise: link, and it is electrically connected with described intelligent card chip, described micro-control unit and described RF transceiving chip, and described link is used for being electrically connected with described receiving terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202774340U CN201611927U (en) | 2009-11-19 | 2009-11-19 | Master/auxiliary card for digital television conditional access system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202774340U CN201611927U (en) | 2009-11-19 | 2009-11-19 | Master/auxiliary card for digital television conditional access system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201611927U true CN201611927U (en) | 2010-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202774340U Expired - Fee Related CN201611927U (en) | 2009-11-19 | 2009-11-19 | Master/auxiliary card for digital television conditional access system |
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| Country | Link |
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| CN (1) | CN201611927U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720012B (en) * | 2009-11-19 | 2012-09-26 | 北京数码视讯科技股份有限公司 | Primary and subsidiary cards for digital television condition receiving system and realization method thereof |
| CN114363707A (en) * | 2022-03-17 | 2022-04-15 | 深圳佳力拓科技有限公司 | WIFI-based smart card local authorization method and system |
-
2009
- 2009-11-19 CN CN2009202774340U patent/CN201611927U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720012B (en) * | 2009-11-19 | 2012-09-26 | 北京数码视讯科技股份有限公司 | Primary and subsidiary cards for digital television condition receiving system and realization method thereof |
| CN114363707A (en) * | 2022-03-17 | 2022-04-15 | 深圳佳力拓科技有限公司 | WIFI-based smart card local authorization method and system |
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