CN202190365U - Condition access system and digital television all-in-one machine - Google Patents
Condition access system and digital television all-in-one machine Download PDFInfo
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- CN202190365U CN202190365U CN2011203481575U CN201120348157U CN202190365U CN 202190365 U CN202190365 U CN 202190365U CN 2011203481575 U CN2011203481575 U CN 2011203481575U CN 201120348157 U CN201120348157 U CN 201120348157U CN 202190365 U CN202190365 U CN 202190365U
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Abstract
The utility model discloses a condition access system and a digital television all-in-one machine, which comprise a large card interface circuit supporting large card decryption and a small card interface circuit supporting small card decryption, wherein the large card interface circuit and the small card interface circuit are respectively communicated with a main control chip. In the utility model, the condition access system carries out compatible design on the large card interface circuit and the small card interface circuit, thus supporting two decryption ways of large card decryption and small card decryption. The condition access system can be used in the system design of a STB (set top box) or the digital television all-in-one machine, so that the digital television receiving product can well satisfy different receiving demands of radio and television systems across the country, and a user only needs to select a large card or a small card according to local receiving demands of local conditions so as to realize the decryption of programs of a digital television, therefore, the condition access system is convenient and flexible to use, and the sale field of the STB or the digital television all-in-one machine is not limited any more.
Description
Technical field
The utility model belongs to the digital TV receiving system technical field, specifically, relates to a kind of digital TV integrated machine that is used for the condition receiving system that the programme information of encrypting is deciphered and adopts said condition receiving system design.
Background technology
Be accompanied by the quickening day by day of digital television signal turn over speed in all parts of the country, most of net of economizing has been accomplished integration, has opened digital television business, and this just makes the demand of digital TV integrated machine increase gradually.In present digital broadcast television, set up many pay-television channels and scrambled TV service channel, realize normal play, come the program of encrypting is deciphered with regard to needing to insert a kind of smart card to these TV programme.Present smart card generally comprises two kinds of kilocalorie (CAM card) and lesser calories (SMART CARD).
Consider that the requirement for condition reception CA (conditional access) in all parts of the country is different, most of DTV developers tend to research and develop the kilocalorie all-in-one of separation between machine and card, adapt to the different CA requirement in various places.But CAM card cost is higher, is example with common safe CA, and the cost of every CAM card between 150-200 unit, has increased consumer's the burden of purchasing usually.And the lesser calorie all-in-one does not need kilocalorie, only needs NRE and the ROYLTY expense of integrated a certain CA to get final product.Wherein, NRE is the english abbreviation of Non-Recurring Engineering, and the NRE expense is disposable engineering cost, is meant the spending of non-recurrent generation in the integrated circuit production cost, in particular, is exactly the development expense of new IC products; The ROYLTY expense is a copyright royalty.For the lesser calorie all-in-one of deciphering high-definition signal, generally about 400,000 yuan, the ROYLTY expense is generally about 12 yuan every the NRE expense, can be by the broadcasting and TV payment of various places.Therefore, if the digital television total amount in a certain area surpasses 2000, then adopt the lesser calorie all-in-one to reduce cost greatly.
Because digital TV integrated machine is sold to after production and where can not be foreseen in advance; Therefore; Whether the condition receiving system that on all-in-one, designs can satisfy local needs can not be confirmed in advance, and this just makes the sales region of digital TV integrated machine be restricted.
Summary of the invention
The purpose of the utility model is to provide a kind of condition receiving system, through designed size card compatible circuit, makes the user can select kilocalorie or lesser calorie to accomplish the task of decryption to digital television program arbitrarily.
For solving the problems of the technologies described above, the utility model adopts following technical scheme to be achieved:
A kind of condition receiving system comprises the big card interface circuit of supporting the kilocalorie deciphering and the little card interface circuit of supporting the lesser calorie deciphering, and said big card interface circuit all is connected communication with little card interface circuit with main control chip.
Further, the card of said big card interface circuit and little card interface circuit insertion detection terminal is connected with the respective pin of main control chip is corresponding respectively with data transfer terminal.Main control chip inserts detection signal according to the card that receives and selects to get into kilocalorie manner of decryption or lesser calorie manner of decryption, and then is communicated with and inserts the data transmission channel of that road interface circuit of smart card, the data behind the receiving and deciphering.
As a kind of preferred design of said big card interface circuit, in said big card interface circuit, include the pcmcia card seat that is used for the plug-in mounting kilocalorie, the card of said pcmcia card seat inserts detection terminal and is connected described main control chip with data transfer terminal.
Wherein, the card of said pcmcia card seat inserts detection terminal and comprises two, two cards insert detection terminal respectively with the corresponding connection of two inputs of an exclusive disjunction circuit, the output of exclusive disjunction circuit connects described main control chip.
Preferably, said pcmcia card seat connects described main control chip through parallel TS flow data transmission line, the program data after the transmission deciphering.
A kind of preferred design as said little card interface circuit; In said little card interface circuit, include SMART CARD deck that is used for the plug-in mounting lesser calorie and the CA interface chip that is connected with said SMART CARD deck, insert detection signal and program data to the main control chip output card through said CA interface chip.
Preferably, said CA interface chip connects main control chip through the asynchronous serial bus, the transmission program data.
Further again, said main control chip is the digital decoding chip that is integrated with CPU, decoder and common interface chip, and said main control chip is connected with little card interface circuit with big card interface circuit respectively through the EBI bus, the transmission control command.
Further, said big card interface circuit is connected with tuner respectively with the lesser calorie interface circuit, receives the ciphered program data of tuner demodulation output.
Based on above-mentioned condition receiving system; The utility model also provides a kind of digital TV integrated machine that adopts said condition receiving system design; Comprise tuner, main control chip and condition receiving system; In said condition receiving system, include the big card interface circuit of supporting the kilocalorie deciphering and the little card interface circuit of supporting the lesser calorie deciphering, said big card interface circuit all is connected communication with little card interface circuit with main control chip.
Compared with prior art, the advantage and the good effect of the utility model are: the condition receiving system of the utility model is through carrying out Compatibility Design to big card interface circuit and little card interface circuit, thereby can support kilocalorie and two kinds of manner of decryption of lesser calorie.Be applied in the system design of STB or digital TV integrated machine; Can receive requirement so that such DTV receives the different condition that product can satisfy broadcasting and TV in all parts of the country system well; The user only needs to receive requirement selection insertion kilocalorie or lesser calorie according to the condition of locality; Can realize decryption work to digital television program, easy to use flexible, also make the realm of sale of STB or digital TV integrated machine no longer be restricted simultaneously.
After the detailed description in conjunction with advantages the utility model execution mode, other characteristics of the utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the schematic block circuit diagram of a kind of embodiment of the condition receiving system that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done explanation in further detail.
Embodiment one, and present embodiment is that example describes with the digital TV integrated machine.
In present digital TV integrated machine, all be provided with major parts such as tuner, main control chip and condition receiving system.Wherein, tuner is used to receive the digital television signal (sending with the form of radiofrequency signal usually) that TV and Radio Service sends, and after demodulation, generally exports TV programme with the form of TS stream.If include enciphered message in the TV programme, then tuner at first carries out decryption processing with TS flow transmission to the condition receiving system after the demodulation.For the condition receiving system that adopts the design of kilocalorie manner of decryption; Can decipher the whole enciphered messages in the program data through the kilocalorie in the system of being inserted into; Program data after the output deciphering is accomplished the decoding processing to audio-video signal to main control chip through main control chip then.For the condition receiving system that adopts the design of lesser calorie manner of decryption; Because lesser calorie can only be deciphered control word and the authorization key encrypted in the program data; Therefore the program data through lesser calorie deciphering output is after transferring to main control chip; Also need main control chip that the enciphered message in the programme content is deciphered; Thereafter carry out the decoding processing of audio-video signal again, audio signal after the decoding processing and vision signal transfer to sound channel and audio frequency output channel respectively the most at last, play TV programme to drive loud speaker and display screen.
In present condition receiving system, all only design a kind of smart card manner of decryption, or the kilocalorie manner of decryption, or the lesser calorie manner of decryption, this condition that just makes a digital TV integrated machine can not satisfy different broadcasting and TV in all parts of the country receives requirement.In order to address this problem; Present embodiment has proposed a kind of condition receiving circuit that adopts the compatible design of big lesser calorie; Comprise the big card interface circuit of supporting the kilocalorie manner of decryption and the little card interface circuit of supporting the lesser calorie manner of decryption; Through with described big card interface circuit and lesser calorie interface circuit respectively with digital TV integrated machine in main control chip be connected communication; Can realize the support of all-in-one to two kinds of manner of decryption, the user can select kilocalorie or lesser calorie to be inserted in the digital TV integrated machine arbitrarily, accomplishes the task of decryption to digital television program.
The physical circuit that Fig. 1 shows above-mentioned condition receiving system that can compatible big two kinds of manner of decryption of lesser calorie makes up block diagram.Wherein, in big card interface circuit, be provided with a pcmcia card seat that is used for plug-in mounting kilocalorie (CAM card), in said pcmcia card seat, be provided with a plurality of metal contacts, be used for the corresponding contact in respective metal contact of on kilocalorie inserts back and kilocalorie, laying.Each metal contact can be defined as card insertion detection terminal CA-DET and data transfer terminal DATA respectively based on the signal difference of transmission, through corresponding with the respective pin of the main control chip respectively connection of holding wire.The data transfer terminal DATA of pcmcia card seat is connected to the output of tuner simultaneously, receives the TS stream of tuner demodulation output, and then be sent to the decryption processing that kilocalorie carries out TV programme.
In the present embodiment, be provided with two cards in the said pcmcia card seat and insert detection terminal CA-DET1, CA-DET2, when one of them detection terminal output high level, i.e. expression has kilocalorie to be inserted in the pcmcia card seat.In order to realize main control chip the state whether kilocalorie inserts is discerned; With the corresponding manner of decryption of automatic selection the TV programme that receive are deciphered; Can two card insertion detection terminal CA-DET1, CA-DET2 of pcmcia card seat be connected with main control chip respectively; For example respectively with the corresponding connection of two GPIO mouths of main control chip; One road GPIO mouth is a high level as long as main control chip detects wherein, thinks that promptly the user has selected the kilocalorie manner of decryption, receives the program data of big card interface circuit deciphering output.
The two-way GPIO mouth that the sort circuit design need take main control chip is accomplished kilocalorie is inserted status detection, therefore, and for port resource integrated chip in short supply relatively and inapplicable.In order to address this problem, present embodiment in the periphery design of pcmcia card seat exclusive disjunction circuit or, as shown in Figure 1.With corresponding respectively two cards that are connected to the pcmcia card seat of two inputs of exclusive disjunction circuit or insert detection terminal CA-DET1, CA-DET2 is last; High-low level signal to through two detection terminal outputs carries out the logic OR computing; As long as the signal of one of them detection terminal output is a high level, then promptly export high level, with the output connection main control chip of exclusive disjunction circuit or through the output of exclusive disjunction circuit or; Road GPIO mouth such as main control chip; Main control chip only need detect the high-low level state of this road GPIO mouth, can identify the current kilocalorie insertion that whether has, and has practiced thrift the port resource of main control chip thus.
Concrete structure form for exclusive disjunction circuit or can adopt multiple design, for example can adopt two diode VD1, VD2 to set up, referring to shown in Figure 1.The anode of two diode VD1, VD2 is inserted detection terminal CA-DET1, the corresponding connection of CA-DET2 with two cards of pcmcia card seat respectively; The negative electrode of two diode VD1, VD2 connects the same road GPIO mouth of main control chip; As long as a detection terminal output high level signal is arranged; Then connected one road diode is conducting, and then exports the detection signal of high level to main control chip.Certainly, said exclusive disjunction circuit or also can adopt or door waits other components and parts to set up realization, and present embodiment is not limited in above giving an example.
For the data transfer mode of pcmcia card seat and main control chip, the program data that present embodiment preferably adopts the form of parallel TS stream that the kilocalorie deciphering is exported is sent to main control chip.In the present embodiment; Said main control chip preferably adopts the digital decoding chip that is integrated with CPU, decoder and CI control chip (being the common interface chip) to carry out circuit design; Directly the program data to kilocalorie deciphering output carries out decoding processing; And separate output audio signal and vision signal wherein, drive loud speaker and display screen respectively and play TV programme.
The CA interface chip of circuit teaming method design can adopt SMART CARD deck to connect to(for) little card interface circuit realizes, referring to shown in Figure 1.Wherein, SMART CARD deck is used to carry lesser calorie; Be designed with in the deck be used for lesser calorie on the signal terminal of the corresponding contact of hard contact; Said signal terminal connects the CA interface chip, and the card through the CA interface chip inserts detection terminal CI-DET and is connected main control chip with data transfer terminal data, the data communication between realization main control chip and the lesser calorie.
Utilize the CA interface chip that the insertion state of lesser calorie is detected, and generate the relevant detection signal and transfer to main control chip, for example wherein one road GPIO mouth of main control chip inserts the automatic identification of state to realize main control chip to lesser calorie.
When the user selected to be inserted into lesser calorie in the digital TV integrated machine, the main control chip control system got into the lesser calorie decryption mode.The data transfer terminal data of CA interface chip is connected tuner, receives the program data of tuner demodulation output, then will be wherein through the control word information of encryption with encrypt after authorization key transfer to lesser calorie and decipher.The CA interface chip receives control word and the authorization key via lesser calorie deciphering output; And then transfer to main control chip in the lump together with the audio-video code stream of encrypting; The enciphered message in the audio-video code stream is deciphered the programme information that formation can normal viewing through main control chip.
As a kind of preferred design of present embodiment, said CA interface chip preferably connects main control chip through the asynchronous serial bus, the transmission program data.
Control command for main control chip generates can be passed through EBI (EXTERNAL BUS INTERFACE) bus transfer to big card interface circuit and little card interface circuit; Specifically can with pcmcia card seat and the corresponding connection of the CA interface chip in the little card interface circuit in the big card interface circuit, realize the coordination control of main control chip to big card interface circuit and little card interface circuit.It is in order to provide and being connected of outside Flash memory, EEPROM and other external equipment that main control chip adopts the purpose of independent EBI bus; Its compatible 68K bus definition; Address bus and 16 BDB Bi-directional Data Bus of 25 are provided; Also have independently reading and writing, gating signal, so be programmable to the operation that is connected the chip on the bus, its addressing range can be at 8KB to 32MB; Peripheral data bus has 8 and 16 optional, through chip selection signal the equipment of hanging is above that operated.
In actual application; Only having a kind of smart card is inserted in the digital TV integrated machine; Through main control chip the smartcard types of inserting is discerned; And then select the corresponding intelligent card decryption system to carry out the decryption work of TV programme, expanded the applicability of digital TV integrated machine thus.
Certainly, the condition receiving system of the compatible big lesser calorie that present embodiment proposed is not limited in and is applied in the digital TV integrated machine, and is suitable equally for present top box of digital machine.Will be through the audio signal that generates after STB deciphering and the decoding processing and video signal transmission to TV SKD, and then loud speaker and the current TV programme of display screen broadcast in the driving television.
Should be noted that; Above-mentioned explanation is not to be the restriction to the utility model; The utility model also is not limited in above-mentioned giving an example; Variation, remodeling, interpolation or replacement that those skilled in the art are made in the essential scope of the utility model also should belong to the protection range of the utility model.
Claims (10)
1. a condition receiving system is characterized in that: comprise and support the big card interface circuit that kilocalorie is deciphered and support the little card interface circuit that lesser calorie is deciphered that said big card interface circuit all is connected communication with little card interface circuit with main control chip.
2. condition receiving system according to claim 1 is characterized in that: the card of said big card interface circuit and little card interface circuit inserts detection terminal and is connected with the respective pin of main control chip is corresponding respectively with data transfer terminal.
3. condition receiving system according to claim 2; It is characterized in that: in said big card interface circuit, include the pcmcia card seat that is used for the plug-in mounting kilocalorie, the card of said pcmcia card seat inserts detection terminal and is connected described main control chip with data transfer terminal.
4. condition receiving system according to claim 3; It is characterized in that: the card of said pcmcia card seat inserts detection terminal and comprises two; Two cards insert detection terminal respectively with the corresponding connection of two inputs of an exclusive disjunction circuit, the output of exclusive disjunction circuit connects described main control chip.
5. condition receiving system according to claim 3 is characterized in that: said pcmcia card seat connects described main control chip through parallel TS flow data transmission line, the program data after the transmission deciphering.
6. condition receiving system according to claim 2; It is characterized in that: in said little card interface circuit, include SMART CARD deck that is used for the plug-in mounting lesser calorie and the CA interface chip that is connected with said SMART CARD deck, insert detection signal and program data to the main control chip output card through said CA interface chip.
7. condition receiving system according to claim 6 is characterized in that: said CA interface chip connects main control chip through the asynchronous serial bus, the transmission program data.
8. according to each described condition receiving system in the claim 1 to 7; It is characterized in that: said main control chip is the digital decoding chip that is integrated with CPU, decoder and common interface chip; Said main control chip is connected with little card interface circuit with big card interface circuit respectively through the EBI bus, the transmission control command.
9. according to each described condition receiving system in the claim 1 to 7, it is characterized in that: said big card interface circuit is connected with tuner respectively with the lesser calorie interface circuit, receives the ciphered program data of tuner demodulation output.
10. digital TV integrated machine is characterized in that: comprise tuner, main control chip and like the described condition receiving system of each claim in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203481575U CN202190365U (en) | 2011-09-16 | 2011-09-16 | Condition access system and digital television all-in-one machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203481575U CN202190365U (en) | 2011-09-16 | 2011-09-16 | Condition access system and digital television all-in-one machine |
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| Publication Number | Publication Date |
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| CN202190365U true CN202190365U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203481575U Expired - Lifetime CN202190365U (en) | 2011-09-16 | 2011-09-16 | Condition access system and digital television all-in-one machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102984581A (en) * | 2012-12-12 | 2013-03-20 | 青岛海信宽带多媒体技术有限公司 | System and detection method for set-top box |
| CN103442273A (en) * | 2013-08-13 | 2013-12-11 | 四川长虹电器股份有限公司 | CI card and CA card compatible method based on digital television set-top box and all-in-one machine |
-
2011
- 2011-09-16 CN CN2011203481575U patent/CN202190365U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102984581A (en) * | 2012-12-12 | 2013-03-20 | 青岛海信宽带多媒体技术有限公司 | System and detection method for set-top box |
| CN103442273A (en) * | 2013-08-13 | 2013-12-11 | 四川长虹电器股份有限公司 | CI card and CA card compatible method based on digital television set-top box and all-in-one machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Video Technology Co., Ltd Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: HISENSE ELECTRIC Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120411 |
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| CX01 | Expiry of patent term |