CN202395924U - Conditional access system and digital integrated machine - Google Patents
Conditional access system and digital integrated machine Download PDFInfo
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- CN202395924U CN202395924U CN2012200038749U CN201220003874U CN202395924U CN 202395924 U CN202395924 U CN 202395924U CN 2012200038749 U CN2012200038749 U CN 2012200038749U CN 201220003874 U CN201220003874 U CN 201220003874U CN 202395924 U CN202395924 U CN 202395924U
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Abstract
The utility model discloses a conditional access system and digital integrated machine, comprising a cassette for plugging an intelligent card, an intelligent card reading controller and a main control chip, wherein the intelligent reading controller is connected with the cassette, and is also connected with the main control chip through a serial port. By using the serial port communication mode, the conditional access system and digital integrated machine realizes the interactive communication between the intelligent card and the main control chip of the encryption and decryption data, thus making the main control chip which is only provided with one TS current interface realize the CI or CA input control for the digital television signals of two channels and realize the support of the system for two decryption modes of a big card and a small card. The conditional access system can be applied to the system structural design for the digital integrated machine so that the digital television reception products can satisfy the reception requirements with different conditions from the radio film and television system across the country; and the user only selects to plug the big card or small card according to the local condition reception requirement so that the decryption task for the digital television programme is finished and the system is convenient and flexible for usage.
Description
Technical field
The utility model belongs to the digital TV receiving system technical field, specifically, relates to a kind of digital intergrated unit 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 also makes the demand of digital TV integrated machine increase gradually.In present digital broadcast television, set up the television channel of many charges and the television channel of encryption, 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,, when design digital TV all-in-one, often two types smart card need be set simultaneously in order to adapt to the different CA requirement in various places.But for present digital TV integrated machine, the main control chip on its decoding deck generally only disposes one road TS interface, can not realize CI or CA input control to the two-way digital television signal.
In order to realize that digital TV integrated machine uses the compatibility of kilocalorie, two kinds of smart cards of lesser calorie; Present solution is that two cards are installed in digital intergrated unit simultaneously; Kilocalorie and lesser calorie use the same road TS passage of main control chip, realize that through switching circuit the gating of two-way audio frequency and video passage switches.
Though this design can solve digital intergrated unit the compatibility of two kinds of smart cards is used problem; But, the circuit structure more complicated, need main control chip that the smartcard types that is inserted into this machine is discerned automatically after; Could carry out the passage switching by the control switch circuit; Therefore the hidden danger that has identification error, be not a kind of desirable solution.
Summary of the invention
The purpose of the utility model is to provide a kind of condition receiving system, adopts the mode of serial communication to carry out the audio, video data transmission of digital television intelligent card and main control chip, accomplishes the decipher function of digital television signal.
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 deck, smart card Read Controller and the main control chip that are used for the plug-in mounting smart card; Said smart card Read Controller connects deck on the one hand, is connected communication through serial ports with said main control chip on the other hand.
Preferably, said smart card Read Controller connects described main control chip through its UART interface, adopts the mode of universal asynchronous serial communication and main control chip to carry out data interaction.
Further; Said deck is the SMART CARD deck that is used for the plug-in mounting lesser calorie; Its data-signal terminal is connected with the respective pin of smart card Read Controller is corresponding with the control signal terminal, utilizes the lesser calorie that is inserted in the SMART CARD deck to realize the encryption control word in the digital television signal and the decryption processing of encryption key.
In order to reduce the data processing amount of main control chip; Alleviate the work load of main control chip; Preferably said smart card Read Controller is connected with a memory that is used to store the audio/video flow decrypted program; Utilize the smart card Read Controller to call the audio/video flow decrypted program enciphered message in the audio, video data is carried out decryption processing, and then formation expressly exports described main control chip to.
Preferably, said smart card Read Controller preferably passes through I
2The C bus connects described memory.
Further, with one road IO mouth of the write-protect pin connection of intelligent card Read Controller of said memory, receive the write-protect control signal of smart card Read Controller output.
Preferably, said memory preferably adopts eeprom memory, and in order to ensure the reliability of signal transmission, preferably SDA, SCL pin and the write-protect pin with eeprom memory is connected DC power supply through pull-up resistor separately.
Further again; In said condition receiving system, also include tuner and demodulator; Through the digital television signal that tuner receive to be encrypted, transfer to after demodulator carries out demodulation, generate the TS stream interface that the TS stream that includes enciphered data exports main control chip to.
For the compatibility of realization condition receiving system to kilocalorie and two kinds of smart cards of lesser calorie; In said condition receiving system, also include the pcmcia card seat that is used for the plug-in mounting kilocalorie, said pcmcia card seat connects the TS stream interface of said main control chip through parallel TS flow data transmission line.
Based on above-mentioned condition receiving system, the utility model also provides a kind of digital intergrated unit that adopts said condition receiving system design, comprises the deck, smart card Read Controller and the main control chip that are used for the plug-in mounting smart card; Said smart card Read Controller connects deck on the one hand, is connected communication through serial ports with said main control chip on the other hand.Utilize the mode of serial communication to realize the wherein transmission of one road data decryption, another road data decryption then can adopt the TS stream interface of main control chip to transmit, and just can realize the support of main control chip to the two-way digital television signal thus.
Compared with prior art; The advantage and the good effect of the utility model are: the condition receiving system of the utility model is realized the interactive communication of encryption and decryption data between smart card and main control chip through the mode that adopts serial communication; Thereby can realize CI or CA input control so that only dispose the main control chip of one road TS stream interface, realize the support of system kilocalorie and two kinds of manner of decryption of lesser calorie to the two-way digital television signal.Be applied in the system design of STB or digital intergrated unit; 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 accomplish task of decryption to digital television program, easy to use flexible.
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;
Fig. 2 is the circuit catenation principle figure between smart card Read Controller and the deck among Fig. 1.
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 teaming method and the operation principle that example specifies condition receiving system with the digital intergrated unit.
In present digital intergrated unit, all be provided with chief components such as tuner, demodulator, 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 converts middle frequency difference sub-signal IF+ to, IF-exports demodulator to and carries out demodulation process.After the demodulator demodulation, generally export TV programme with the form of TS stream.If include enciphered message in the TV programme, then demodulator 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, no matter be through the clear data of kilocalorie deciphering output or the program data of exporting through the lesser calorie deciphering; All be to export main control chip to the data transmittal and routing form that TS flows; For the main control chip that only disposes one road TS stream interface, can't realize CI or CA input control like this to the two-way digital television signal.In order to address this problem; Present embodiment has proposed a kind of design that adopts the serial communication mode to realize encryption and decryption data interactive communication between smart card and main control chip; Realize support so that only dispose the main control chip of one road TS stream interface to kilocalorie and two kinds of manner of decryption of lesser calorie; Thus one, 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.
Below in conjunction with Fig. 1 the concrete establishment structure of the condition receiving system of present embodiment is described in detail.
Referring to shown in Figure 1, the condition receiving system of present embodiment mainly cooperates the main control chip of digital intergrated unit to set up realization by the deck that is used for the plug-in mounting smart card, smart card Read Controller.Utilize the smart card Read Controller as middle bridge; Export the program data of encrypting to be inserted in the deck smart card and carry out decryption processing; And then the program data after will deciphering converts the universal serial bus data to, exports main control chip to, to realize the decoding processing to audio, video data.
As a kind of preferred design of present embodiment, said smart card Read Controller preferably adopts generic asynchronous serial bus interface UART to be connected communication with main control chip; The deck that is connected with said smart card Read Controller is preferably the SMART CARD deck that is used for the plug-in mounting lesser calorie.In order to realize the support of digital intergrated unit to kilocalorie, two kinds of smart cards of lesser calorie; Can the pcmcia card seat that be used for plug-in mounting kilocalorie (CAM card) directly be connected with the TS stream interface of main control chip through parallel TS flow data transmission line, adopt TS flow data transmission manner to carry out the transmitted in both directions of encryption and decryption data.
The operation principle of this condition receiving system is: through the TV signal of tuner conversion output; After exporting demodulator to and be demodulated to the TS flow data with the form of middle frequency difference sub-signal IF+, IF-, directly export the TS stream interface of main control chip to through parallel TS flow data transmission line.Main control chip judges according to the TS flow data that receives whether the current digital television signal that is input in the system is the program data of encrypting.If then further judgement should adopt the smart card of which kind of type that enciphered data is carried out decryption processing; If needing to use lesser calorie deciphers; Then the main control chip TS flow data that will include enciphered message converts the UART data to, exports the smart card Read Controller to, transfers to the lesser calorie in the SMART CARD deck through the smart card Read Controller; The control word of encryption and the authorization key of encryption are carried out decryption processing; Data to smart card Read Controller after the passback deciphering then, and then feed back to main control chip through the UART bus, utilize the audio/video flow decrypted program that moves in the main control chip further the enciphered data in the programme content to be deciphered after; To restore expressly, carry out the decoding processing of conventional audio, video data then.If judgement needs to use kilocalorie to decipher; Then main control chip directly transfers to kilocalorie with the program data of encrypting through its TS stream interface and deciphers; Be reduced into expressly; Still return to main control chip, carry out driving loud speaker and display screen broadcast TV programme after conventional audio/video decoding handles through main control chip via original parallel TS flow data transmission line.If the digital television signal that is input in the system is a normal signal, do not comprise enciphered message, then main control chip can directly carry out the audio/video decoding processing to it, realizes the normal play of TV programme.
Fig. 2 is the circuit catenation principle figure of smart card Read Controller and SMART CARD deck, and wherein, N1 is the smart card Read Controller, and XS10 is a SMART CARD deck.Smart card Read Controller N1 connects one to one with data-signal terminal and the control signal terminal of SMART CARD deck XS10 respectively through 1-7 and 17 pins; Reset signal SCardRst and clock signal SCardclk are provided and are used for the control command that control data exchanges to smart card; And provide smart card work required working power SCardVCC to the power supply terminal of SMART CARD deck XS10; Through carrying out data communication, realize encrypting the decryption processing of control word and authorization key with the smart card that is installed in SMART CARD deck XS10.Utilize the UART serial ports of said smart card Read Controller N1 to be connected communication with main control chip via RXD, TXD holding wire; On the one hand receive the enciphered data that main control chip sends, and then convert data transmission format that smart card supports to and send to smart card and carry out decryption processing; Become the UART returning data to give main control chip the data transaction after the smart card deciphering on the other hand, to accomplish the task of decryption of digital television signal.
Because when adopting lesser calorie to decipher, lesser calorie can only be deciphered control word in the enciphered data and authorization key, still needs main control chip to be responsible for decryption processing for the enciphered message in the audio and video data streams, this has increased the workload of main control chip undoubtedly.In order to alleviate the burden of main control chip, present embodiment preferably increases a memory N27 who is used to preserve the audio/video flow decrypted program in condition receiving system, as shown in Figure 2, connects described smart card Read Controller N1, preferably adopts I
2C bus SDA, SCL realize the connection communication between the two, realize smart card Read Controller N1 calling the audio/video flow decrypted program.
Said memory N27 can select storage chips such as EEPROM or FLASH for use; The write-protect pin (7 pin) of memory N27 is connected to wherein one road IO mouth of smart card Read Controller N1; 18 pins for example; Receive the write-protect control signal EEPWP of smart card Read Controller N1 output, to realize read-write control to memory N27.
After adopting the sort circuit design; Smart card Read Controller N1 can replace main control chip to accomplish the decryption processing to enciphered message in the audio and video data streams; And then form expressly and export described main control chip to, the decoding processing of directly carrying out audio, video data through main control chip gets final product.
Reliability in order to ensure the signal transmission; Preferably SDA, the SCL pin (5,6 pin) with memory N27 is connected DC power supply VCC3.3 through pull-up resistor R90, R92, R100, R102, R89 separately with write-protect pin (7 pin), to improve the antijamming capability of signal transmission.
Among Fig. 2, crystal oscillator Y1 cooperates resistance R 20 and capacitor C 48, C49 to constitute crystal oscillating circuit, crystal oscillator pin X0, the X1 of connection of intelligent card Read Controller N1, and N1 provides reference clock for the smart card Read Controller.The anode of light-emitting diode VD1, VD16 connects DC power supply VCC3.3 through current-limiting resistance R566, R574 respectively; Negative electrode respectively with the corresponding connection of two- way IO mouth 23,22 pins of smart card Read Controller N1; Behind complete machine powering; N1 is low with the electric position of its 22 pin through the smart card Read Controller, and control light-emitting diode VD16 lights, and indicating circuit powers on.When smart card Read Controller N1 carried out the transfer of data operation, through its 23 pin output consecutive pulses signal, control light-emitting diode VD1 flicker was to indicate current data transmission state.
In actual application; The digital television signal that the same time only has a kind of cipher mode inputs to digital TV integrated machine; Thereby; Through main control chip the cipher mode of the digital television signal that receives is discerned, and then selected 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 in the television set and display screen carried out drive controlling, the broadcast of realization current television program is exported.
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 the deck, smart card Read Controller and the main control chip that are used for the plug-in mounting smart card; Said smart card Read Controller connects deck on the one hand, is connected communication through serial ports with said main control chip on the other hand.
2. condition receiving system according to claim 1 is characterized in that: said smart card Read Controller connects described main control chip through its UART interface.
3. condition receiving system according to claim 1 is characterized in that: said deck is the SMART CARD deck that is used for the plug-in mounting lesser calorie, and its data-signal terminal is connected with the respective pin of smart card Read Controller is corresponding with the control signal terminal.
4. condition receiving system according to claim 3 is characterized in that: said smart card Read Controller also is connected with a memory that is used to store the audio/video flow decrypted program.
5. condition receiving system according to claim 4 is characterized in that: said smart card Read Controller passes through I
2The C bus connects described memory.
6. condition receiving system according to claim 5 is characterized in that: one road IO mouth of the write-protect pin connection of intelligent card Read Controller of said memory receives the write-protect control signal that the smart card Read Controller is exported.
7. condition receiving system according to claim 6 is characterized in that: said memory is an eeprom memory, and its SDA, SCL pin and write-protect pin are connected DC power supply through pull-up resistor separately.
8. according to each described condition receiving system in the claim 1 to 7; It is characterized in that: in said condition receiving system, also include tuner and demodulator; Receive the digital television signal of encrypting through tuner; Transfer to after demodulator carries out demodulation, generate the TS stream interface that the TS stream that includes enciphered data exports main control chip to.
9. condition receiving system according to claim 8; It is characterized in that: in said condition receiving system, also include the pcmcia card seat that is used for the plug-in mounting kilocalorie, said pcmcia card seat connects the TS stream interface of said main control chip through parallel TS flow data transmission line.
10. a digital intergrated unit is characterized in that: comprise 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 |
|---|---|---|---|
| CN2012200038749U CN202395924U (en) | 2011-12-26 | 2012-01-06 | Conditional access system and digital integrated machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120550733.4 | 2011-12-26 | ||
| CN201120550733 | 2011-12-26 | ||
| CN2012200038749U CN202395924U (en) | 2011-12-26 | 2012-01-06 | Conditional access system and digital integrated machine |
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| CN202395924U true CN202395924U (en) | 2012-08-22 |
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| CN2012200038749U Expired - Lifetime CN202395924U (en) | 2011-12-26 | 2012-01-06 | Conditional access system and digital integrated machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916684A (en) * | 2014-04-29 | 2014-07-09 | 深圳国微技术有限公司 | Signal acquisition and transmission system and method based on PCMCIA interface |
| CN110753255A (en) * | 2018-07-24 | 2020-02-04 | 扬智科技股份有限公司 | Transmission stream receiving device and clock frequency setting method thereof |
-
2012
- 2012-01-06 CN CN2012200038749U patent/CN202395924U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916684A (en) * | 2014-04-29 | 2014-07-09 | 深圳国微技术有限公司 | Signal acquisition and transmission system and method based on PCMCIA interface |
| CN103916684B (en) * | 2014-04-29 | 2018-01-16 | 深圳国微技术有限公司 | A kind of signal acquisition Transmission system and method based on pcmcia interface |
| CN110753255A (en) * | 2018-07-24 | 2020-02-04 | 扬智科技股份有限公司 | Transmission stream receiving device and clock frequency setting method thereof |
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
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Granted publication date: 20120822 |
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| CX01 | Expiry of patent term |