CN1642268A - Machine-card separating condition receiving method and system - Google Patents
Machine-card separating condition receiving method and system Download PDFInfo
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- CN1642268A CN1642268A CNA2004100012236A CN200410001223A CN1642268A CN 1642268 A CN1642268 A CN 1642268A CN A2004100012236 A CNA2004100012236 A CN A2004100012236A CN 200410001223 A CN200410001223 A CN 200410001223A CN 1642268 A CN1642268 A CN 1642268A
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Abstract
The invention is a digital video broadcast receiving device, including receiver, conditional receiving system and signal source decoder, where the conditional receiving system includes: a signal source decoding leading module to decode digital signal into transmission flow, extract the appointed program related code stream to be descrambled and it conditional receiving control information to act as the first signal output for descrambling, receive the descrambled appointed program related code stream to act as the second signal, and output the other code streams in the transmission flow and the second signal to the signal source decoder; a conditional receiving processor to receive the first signal and descramble the above appointed program code stream according to the conditional receiving control information in the first signal and output the second signal to the signal source decoding leading module; and a connecting device to transmit the first signal from the signal source decoding leading module to the conditional receiving processor and transmit the second module from the conditional receiving processor to the signal source decoding leading module.
Description
Technical field
The present invention relates to digital video communication system, relate in particular to the method and system that condition receives in the digital video communication system.
Background technology
The release of digital television broadcasting and high definition TV technology and development have welcome new era of TV tech, along with the rapid popularization of computer network, make Digital Video Communication be with a wide range of applications simultaneously in video broadcasting, computer network and INTERNET field.For example in the digital television broadcasting net, by the set-top box received television program and output on the equipment such as television set.
Along with the development of digital video application, people will enjoy programs more high-quality, more services in the face of increasing channel selection.Operator then will buy with other making for the copyright of these programs and pay higher cost, requires that the user is collected certain license fee and uses.Country variant and organize and proposed condition reception (CA) technical standard one after another, for example propose in the DVB standard series based on CA technology of MPEG-2 coded system or the like.
The CA technology mainly comprises the content of two aspects, the one, and to the method for transmission scrambling and descrambling, the 2nd, descrambling control guarantees the normal signal after the user receiving equipment (for example set-top box) that has only process to authorize just can obtain descrambling.The CA system exports control word in the scrambler of transmitting terminal, and guarantees can correctly obtain this control word through the descrambler of authorizing, thereby transmitting data stream is carried out descrambling.The different CA system generations and the method for management control word are different.
The CA system is the system of a more complicated, and its problem of implementation, the especially problem of implementation on user receiving equipment (for example set-top box) are the outstanding problems that hinders the digital video broadcasting application development always, does not still have good solution so far.With the set-top box is example, because CA relevant treatment unit is embedded in the set-top box, makes secret control and the application of set-top box producing and selling and CA be very limited.At present, industry has realized that the separation between machine and card mode is of value to digital television receiver manufacturing enterprise, consumer, CA producer, digital-TV operator, can fundamentally promote the development of Digital Television industry.
The separation between machine and card scheme that has proposed comprises " kilocalorie " scheme and " lesser calorie " scheme, and the two source coding module that all is based in the set-top box realizes.
Fig. 7 is that example shows the architecture based on the set-top box scenario of lesser calorie in the same close mode of DVB standard.As shown in the figure, receiver 71 receives the broadcast singal by the transmission channel transmission of for example wired network, computer network, satellite communication network or the like, and is converted into digital signal.The digital signal of 72 pairs of receptions of demodulator is carried out demodulation, to form mpeg 2 transport stream.Demodulation multiplexer 73 extracts EMM and is sent to the lesser calorie 74 that links to each other with set-top box with ECM and by interface from mpeg 2 transport stream.Lesser calorie 74 comprises corresponding authentification of user and deciphering module, can be that validated user produces control word (CW) according to EMM and ECM, and control word CW is returned to descrambler 77 in the set-top box.Descrambler 77 utilizes control word that the code stream of scrambling is carried out descrambling, and non-scrambling code stream is outputed to decoder 75.75 pairs of code streams of decoder are decoded (for example video decode, audio decoder or the like), and decoded signal is sent to output equipment 76 outputs.
The lesser calorie scheme is retained in the independent formation lesser calorie of deciphering module in the receiving equipment and condition is received other relevant functions, and its shortcoming is: require the open part technical scheme of CA manufacturer, unified part algorithm and interface standard; The password transmission bus exposes, and has reduced fail safe; The development and the function expansion of CA technology have been limited to a certain extent; User receiving equipment software and hardware technology Scheme Selection will be considered the requirement of CA, or the like.In a word, fail to realize separation between machine and card completely, therefore, can not terms of settlement receive problem to Digital Television/set-top box producer is brought.
Fig. 8 is that example shows the architecture based on the set-top box scenario of kilocalorie in the how close mode of DVB standard.As shown in the figure, receiver 81 receiving broadcast signals, and be converted into digital signal.The digital signal of 82 pairs of receptions of demodulator is carried out demodulation, with the formation mpeg 2 transport stream, and is sent to the kilocalorie 84 that links to each other with set-top box.Kilocalorie 84 comprises demodulation multiplexer, CA module and descrambler, and wherein demodulation multiplexer extracts EMM and ECM from mpeg 2 transport stream, and the CA module is that validated user produces control word (CW) according to EMM and ECM, and descrambler utilizes control word that the code stream of scrambling is carried out descrambling.The code stream of scrambling and process descrambling is not output to decoder 85.85 pairs of code streams of decoder are decoded, and decoded signal is sent to output equipment 86 outputs.
The kilocalorie scheme is with demultiplexing module, and descrambling module and condition receive the relevant all independent formation kilocalorie of all modules, flows to the line data exchange with user receiving equipment by TS.This method has solved the shortcoming of lesser calorie scheme, but brings new problem.Its shortcoming is: require jig to have and be equal to the data bandwidth that TS flows, increased the design and the manufacture difficulty of card and user receiving equipment, the R﹠D cycle is long; Because not only integrated condition receives relevant part in the card, and integrated condition receives irrelevant part, and for example: demultiplexing module has increased scale, power consumption and the cost of card.
In addition, plurality of chips manufacturer has all released integrated-type source coding chip, the OMEGA:STi55xx of ST Microelectronics for example, STB0210x of IBM or the like.This class chip is integrated and the interface of above-mentioned lesser calorie or kilocalorie, relative fixed the function between chip and lesser calorie and the kilocalorie divide, the function expansion and the improvement of reply card have brought inborn restriction mutually.Therefore, limited the flexibility of separation between machine and card based on the realization of source coding chip.Also do not have at present to expand the CA disposal ability, again can with the scheme of the integrated decoding chip seamless connection of this class.
In addition, the machine card connection mode of prior art adopts for example PCMCIA usually, the versabus standard of USB or the like, and the bus standard of these prior aries is not a feature that receive to handle at condition and custom-designed, therefore cause cost higher, design complexity and efficient are lower.
Therefore, need the problems referred to above that new scheme solves prior art.
Summary of the invention
The objective of the invention is to propose a kind of condition receiving method and system of separation between machine and card, this method and system possesses high security and reliability, high flexibility and adaptability, low-cost, characteristic such as be easy to produce and simple to operate, reach the target that separation between machine and card is expected, fundamentally solve the problem that exists in the above-mentioned separation between machine and card scheme, help to promote the universalness that digital video broadcasting is used, and industry development.
The invention provides a kind of digital video broadcasting receiving equipment, comprise receiving broadcast signal and convert the receiver of digital signal to, digital signal is converted to the condition receiving system of the transport stream that contains the descrambling code stream, with the described transport stream of reception, to its source decoder that carries out source coding and output to output equipment, described condition receiving system comprises: guide module before the source coding, be used for described digital signal decoding is become transport stream, extracting relevant code stream of the appointed program of wanting descrambling and condition receiving control information thereof from described transport stream exports for descrambling as first signal, receive through the appointed program of descrambling and be correlated with code stream, and other code stream and secondary signal in the transport stream are outputed to described source decoder as secondary signal; The condition receiving processor is used to receive described first signal, according to wherein condition receiving control information described appointed program code stream is carried out descrambling, and guide module is exported described secondary signal before source coding; And jockey, be used for that guide module transmits first signal to the condition receiving processor before the source coding, transmit secondary signal from condition receiving processor guide module before source coding.
The present invention also provides a kind of condition receiving method that is used for the digital video broadcasting receiving equipment, described digital video broadcasting comprises receiving broadcast signal and converts the receiver of digital signal to, digital signal is converted to the condition receiving system of the transport stream that contains the descrambling code stream, with the described transport stream of reception, to its source decoder that carries out source coding and output to output equipment, described condition receiving system comprises the preceding guide module of source coding, the condition receiving processor, and jockey, the method comprising the steps of: by guide module before the source coding described digital signal decoding is become transport stream; The preceding guide module of source coding extracts the relevant code stream of the appointed program of wanting descrambling from described transport stream and the condition receiving control information is exported for descrambling as first signal; Condition receiving processor executive condition receives to be handled, wherein receive described first signal, according to wherein condition receiving control information described appointed program code stream is carried out descrambling, and before source coding guide module output through the relevant code stream of appointed program of descrambling as secondary signal; Guide module receives described secondary signal before the source coding; Guide module outputs to described source decoder with other code stream and secondary signal in the transport stream before the source coding.
The present invention also provides a kind of condition receiving processor that is used for the digital video broadcasting receiving equipment, and described digital video broadcasting receiving equipment comprises receiving broadcast signal and converts the receiver of digital signal to; Guide module before the source coding, be used for described digital signal decoding is become transport stream, extracting relevant code stream of the appointed program of wanting descrambling and condition receiving control information thereof from described transport stream exports for descrambling as first signal, receive through the appointed program of descrambling and be correlated with code stream as secondary signal, and with other code stream and secondary signal output in the transport stream; Receive described other code stream and secondary signal, to its source decoder that carries out source coding and output to output equipment; Jockey, be used for that guide module transmits first signal to the condition receiving processor before the source coding, transmit secondary signal from condition receiving processor guide module before source coding, described condition receiving processor comprises: the device that is used to receive first signal and sends secondary signal; The CPU module is used for obtaining control word according to the condition receiving control information; And descrambling module, be used to use control word that appointed program associated code stream is carried out descrambling.
Because the CAP among the present invention adopts reconfigurable architecture Design, therefore, the present invention can be used for various condition receiving systems.
Compare with the scheme of prior art, technical scheme of the present invention not only improves the fail safe of key, makes condition receiving system have higher fail safe, reliability and realizability simultaneously.Because radical innovation of the present invention and characteristics thereof, can accelerate design, realization, the commercialization of digital video device and system thereof, the process of the marketization.The present invention adopts reconfigurable architecture to support the design and the realization of decipherment algorithm in the conditional receiving device, for condition receiving system and condition receiving card designer provide convenience, platform flexibly, further technical foundation is provided and has widened the possibility in market for the digital video broadcasting application and development.
Briefly say, the present invention adds " CA processor (BPCAP:BiPre-CAProcessor) before two-way " of the present invention in the guide module (PDM:Pre DecoderModule) before source coding, with " compression express passway (CFIO:CompressionFast I/O) " of the present invention, constitute the leading functional module of extended pattern source coding (EPDM:Extended Pre Decoding Module).EPDM is connected with the condition receiving processor (CAP:Conditional Access Processor) of the present invention's definition, the relevant data that PDM is produced flows through after the processing of BPCAP, be sent to CAP, finish processing by CAP to these data, and treated data are transmitted back to EPDM, finish the reconstruction of entire stream by BPCAP.The interface of EPDM and follow-up source coding module remains unchanged.The example of the simplest PDM functional module is the channel demodulation decoder module.
Description of drawings
Can understand above and other objects of the present invention, feature and advantage more all sidedly with reference to the detailed description of in conjunction with the accompanying drawings embodiment of the invention being carried out, wherein:
Fig. 1 shows the system construction drawing based on the set-top box of an embodiment of condition receiving system of the present invention;
Fig. 2 shows the structure chart based on the EPDM of the condition receiving system of EPDM separation between machine and card;
Fig. 3 shows the CAP structure chart based on the condition receiving system of EPDM separation between machine and card;
Fig. 4 shows the structure chart of CFIO main equipment;
Fig. 5 shows the structure chart of CFIO slave unit;
Fig. 6 shows the structure chart based on the condition receiving system of EPDM separation between machine and card that is applied to wire transmission;
Fig. 7 is that example shows the structure chart based on the set-top box scenario of lesser calorie in the same close mode of DVB standard;
Fig. 8 is that example shows the structure chart based on the set-top box scenario of kilocalorie in the how close mode of DVB standard; And
Fig. 9 shows the flow chart based on the condition receiving method of one embodiment of the invention.
Embodiment
Fig. 1 is based on the system construction drawing of the set-top box of an embodiment of condition receiving system of the present invention.As shown in Figure 1, set-top box comprises receiver 1, demodulator 2, and EPDM 8, CAP 9 and source coding module 5.As described below, the part of EPDM 8 and CAP 9 structure condition receiving systems.
More specifically, the broadcast singal in EPDM 8 receive channels through for example Digital Signal Processing of QAM demodulation or the like, produces for example binary code stream of MPEG-2.With MPEG-2 is example, after binary code stream is handled through demultiplexing, according to the content of PSI stream with set or the information of the program of appointment (for example expectation watch program), extract and determine the relevant code stream of program (promptly expecting code stream) by the CAP processing, and the condition receiving control information.Determine that code stream that program is relevant and condition receiving control information thereof are sent to " card " of the present invention--CAP by the CFIO that is different from prior art machine card connection mode (for example PCMCIA, USB or the like).Store private key for user among the CAP 9.CAP 9 utilizes the private key for user of storage inside and is decrypted processing from the condition receiving control information of EPDM 8, produces to add descrambled control words; Utilization adds descrambled control words the code stream of being correlated with from definite program of EPDM 8 is carried out scramble process, and will be through the relevant code stream loopback EPDM 8 of definite program of scramble process.EPDM 8 receives the relevant code stream of definite program behind the descrambling, outputs to source coding module 5 together with other parts in the source code flow.The source coding resume module is from the code stream of EPDM 8, determine that wherein the relevant code stream of program has passed through scramble process, and the also process adjustment of condition receiving control information that definite program is relevant, for example remove among the PSI at the scrambling sign of this program, determine that to show this program stream is not by scrambling; Source coding module 5 produces video, audio signal or the like by demultiplexing and decoder module, is sent on the output equipment 6 and broadcasts.
EPDM of the present invention and CAP can pass through single-chip, and microprocessor, logical circuit, application-specific integrated circuit (ASIC) or the like are realized, and can be programmable.Described condition receiving control information depends on the specific implementation of condition receiving system, so the present invention is not limited to concrete condition receiving system.
Fig. 2 is based on the structure chart of the EPDM of an embodiment of condition receiving system of the present invention, has wherein specifically illustrated the structure of BPCAP 204.EPDM comprises BPCAP 204 and PDM 210.BPCAP comprises: demultiplexing module 201, CFIO main equipment 203 and code stream rebuilding module 202.
PDM 210 becomes transport stream with the Digital Signal Processing that receiver provides.BPCAP 204 is used for exporting for descrambling as described first signal from relevant code stream of appointed program and condition receiving control information thereof that descrambling is wanted in described transport stream extraction, receive through the appointed program of descrambling and be correlated with code stream, and other code stream in the transport stream and described secondary signal are outputed to the source coding module as described secondary signal.Demultiplexing module 201 is used for transport stream being resolved into code stream and extracting relevant code stream of the appointed program of wanting descrambling and condition receiving control information thereof.Code stream rebuilding module 202 is used for that other code stream and secondary signal are synthesized described appointed program and is marked as the transport stream of non-scrambling to output to described source coding module.CFIO main equipment 203 is used for sending first signal according to first pre-determined data rate by the CFIO bus, and receive secondary signal by the CFIO bus according to second pre-determined data rate, wherein the extraction rate of first pre-determined data rate and BPCAP 204 mates, and second set rate and BPCAP 204 are to the output speed coupling of described source coding module.
More specifically, the transport stream that BPCAP 204 receives from PDM 210, result is exported to follow-up source coding module.Demultiplexing module 201 filters out the code stream of determining that program is relevant, determine the condition receiving control information of program, CFIO main equipment 203 is set up being connected between BPCAP and the CAP, the relevant code stream of definite program that demultiplexing module is filtered out, and the condition receiving control information outputs to CAP, and the code stream of the process scramble process that CAP is produced is input to BPCAP.The code stream rebuilding module receives from the source code flow of demultiplexing module with from definite program of CFIO main equipment and passes through the code stream of scramble process, finishes code stream and rebuilds.The code stream of code stream rebuilding module output has following feature: (1) be consistent with source code flow on the time relativeness (by utilizing the mechanism such as but not limited to buffering area or the like); (2) guarantee to determine that the relevant code stream of program has not scrambling characteristic; (3) the condition reception information of this program indicates this program and is ciphered program not.According to an optional embodiment of the present invention, as in the set-top box of prior art, after demultiplexing and descrambling, the code stream of source code flow and process scramble process can directly offer decoder module without the code stream rebuilding module.Therefore can omit the code stream rebuilding module.
Fig. 3 is based on the structure chart of the CAP of an embodiment of condition receiving system of the present invention.CAP comprises: CFIO slave unit 301, CPU module 303, decryption engine 304 and descrambling module 302.
CFIO slave unit 301 is used for receiving first signal according to first pre-determined data rate by the CFIO bus, and sends secondary signal according to second pre-determined data rate by the CFIO bus.CPU module 303 is used for obtaining control word according to the condition receiving control information.The descrambling mould.302 are used to use control word that appointed program associated code stream is carried out descrambling.Decryption engine 304 is used for decrypting control word according to the condition receiving control information.
With reference to Fig. 3, CAP receives the relevant code stream of definite program from EPDM, and the condition receiving control information, definite program associated code stream is carried out scramble process, and will be transmitted back to EPDM through the code stream of scramble process.CFIO slave unit 301 receives the relevant code stream of definite program from EPDM, and the condition receiving control information, will determine that the relevant code stream of program delivers to descrambling module 302, and the condition receiving control information is delivered to CPU module 303.Core cpu 305 operations are stored in the program in the program storage 306, the analysis condition receiving control information, be extracted as the required information of descrambled control words that produces, drive 304 pairs of information of being extracted of decryption engine and carry out the one or many deciphering, the final generation adds descrambled control words (CW).Comprise decipherment algorithm module 308 and the flash memory 309 that can be used for storing private key for user in the decryption engine 304, private key for user can the DLL (dynamic link library) of PIN write outside for example, but can not read from outer PIN; Decryption engine 304 receives decryption command, key/key source and the enciphered data from core cpu 305, select corresponding the processing or handling process according to decryption command, with specifying key or specifying the key in source to carry out the decryption oprerations flow process, produce the data after deciphering, send CPU module 303 or descrambling module 302 back to.The descrambled control words CW that adds that descrambling module 302 usefulness decryption engines 304 produce does seed, the scrambled code stream from CFIO slave unit 301 is carried out scramble process, and result is write back CFIO slave unit 301.CFIO slave unit 301 flows back to the definite program associated code behind the descrambling delivers to EPDM.
That connect EPDM and CAP is CFIO, comprises two parts of main equipment and slave unit, and main equipment partly is used for EPDM, and slave unit partly is used for CAP.Main equipment links to each other by the CFIO bus with slave unit, the CFIO bus is by 8 position datawire Data, output control line Out_en, and input control line In_en and clock line clk constitute, yet the CFIO bus is not limited to above-mentioned specific implementation, but can adopt other type of attachment known in the art.
Fig. 4 is the structure chart of CFIO main equipment.The CFIO main equipment comprises: main equipment end transmit queue 402 and control logic 401 thereof, the main equipment termination is received formation 403 and control logic 404 thereof, main equipment end bus control module 405.
Main equipment end transmit queue 402 is under the control of its control logic 401, receive in real time from definite program of demultiplexing module relevant code stream and condition receiving control information rather than whole transport stream, therefore main equipment end bus control module 405 obtains code stream with the low frequency clock from main equipment end transmit queue 402, transmits to CAP.The main equipment termination is received formation 403 under the control of its control logic 404, obtain code stream and write formation from main equipment end bus control module 405 with low dominant frequency clock, code stream rebuilding module (or decoder) is received the formation 403 from the main equipment termination with the code stream transmission speed when needed and is obtained code stream.Main equipment end interface control module 405 is responsible for and will be write on the data wire with low dominant frequency from the data that send formation, be responsible for from data wire, fetching data with low dominant frequency, also be responsible for producing control command simultaneously, use out_en, the in_en coded representation the CFIO slave unit.
Fig. 5 is the structure chart of CFIO slave unit.The CFIO slave unit comprises: slave unit end transmit queue 503 and control logic 504 thereof, the slave unit termination is received formation 502 and control logic 501 thereof, slave unit end bus control module 505.
Slave unit end transmit queue 503 is under the control of its control logic 504, receive from the relevant code stream of definite program of descrambling module with low dominant frequency, slave unit end bus control module 505 obtains code stream with the low frequency clock from slave unit end transmit queue 503, prepares to transmit to EPDM.The slave unit termination is received formation 502 under the control of its control logic 501, obtains code stream and writes formation from slave unit end bus control module 505 with low dominant frequency clock, and CPU module and descrambling module are received the formation 502 from the slave unit termination with low dominant frequency and obtained code stream.Slave unit end interface control module 505 is accepted the control of CFIO main equipment, be responsible for and write on the data wire with low dominant frequency from the data that send formation, be responsible for simultaneously fetching data with low dominant frequency from data wire, the control of CFIO main equipment is by out_en, in_en coded representation.
Compare with the machine card connection mode of prior art, the characteristics of the simple and suitable more machine cartoon letters of the present invention of CFIO of the present invention, and owing to allow to operate with more low-frequency clock, make that the related hardware power consumption is lower, to the requirement that realizes technology still less, and the design difficulty of the pcb board at hardware place is also lower, and promptly integrated difficulty is lower.
Fig. 6 is based on the structure chart of the condition receiving system of a kind of set-top box embodiment that is used for wire transmission of the present invention.Comprise QAM demodulation module 601 among the EPDM, FEC module 602 and BPCAP 204.
QAM demodulation module 601 and FEC module 601 are finished wire message way demodulating and decoding function, produce source code flow.BPCAP module 204 cooperates CAP 9 to finish the descrambling of determining the relevant code stream of program, and rebuilds code stream according to the order of source code flow, exports to source coding module 603.What source coding module 603 received is the code stream of process scramble process, therefore, directly enters decoder processes, produces audio frequency, video, and the signal of data or the like such as TV, is exported on the output equipment of display, loud speaker or the like.
Fig. 9 shows the flow chart based on the condition receiving method of one embodiment of the invention.In step S1, EPDM (for example by the PDM among the EPDM) will become transport stream from the digital signal decoding of receiver.In step S2, EPDM (for example passing through the demultiplexing module of the BPCAP among the EPDM) extracts relevant code stream of the appointed program of wanting descrambling and condition receiving control information thereof from described transport stream, and exports (for example by the CFIO main equipment) at step S3 as first signal and arrive CAP for descrambling.At step S4, CAP (for example by the CFIO slave unit) receives first signal, at step S5 basis condition receiving control information wherein the appointed program code stream is carried out descrambling (for example passing through descrambling module), and be correlated with code stream as secondary signal (for example by the CFIO slave unit) to EPDM output through the appointed program of descrambling at step S6.EPDM receives described secondary signal (for example by the CFIO main equipment) at step S7.EPDM step S8 with transport stream in other code stream and secondary signal output to described source coding module.
According to an optional embodiment, step S2 can also comprise the demultiplexing step, is used for transport stream is resolved into code stream for extraction.
According to another optional embodiment, step S8 can also comprise the code stream reconstruction procedures, is used for that other code stream and secondary signal are synthesized described appointed program and is marked as the transport stream of non-scrambling to output to described source decoder.
Though specifically provide and described the present invention with reference to specific embodiment, yet scope of the present invention is not limited only to this, and it should be appreciated by those skilled in the art that and to make various changes to its form and details without departing from the spirit and scope of the present invention.Can use hardware, software and combination thereof realize above-mentioned functions.
Claims (15)
1. digital video broadcasting receiving equipment, comprise receiving broadcast signal and convert the receiver of digital signal to, digital signal is converted to the condition receiving system of the transport stream that contains the descrambling code stream, with the described transport stream of reception, to its source decoder that carries out source coding and output to output equipment, described condition receiving system comprises:
Guide module before the source coding, be used for described digital signal decoding is become transport stream, extracting relevant code stream of the appointed program of wanting descrambling and condition receiving control information thereof from described transport stream exports for descrambling as first signal, receive through the appointed program of descrambling and be correlated with code stream, and other code stream and secondary signal in the transport stream are outputed to described source decoder as secondary signal;
The condition receiving processor is used to receive described first signal, according to wherein condition receiving control information described appointed program code stream is carried out descrambling, and guide module is exported described secondary signal before source coding; With
Jockey is used for that guide module transmits first signal to the condition receiving processor before the source coding, transmits secondary signal from condition receiving processor guide module before source coding.
2. according to the digital video broadcasting receiving equipment of claim 1, guide module comprises before the wherein said source coding:
Channel decoder is used for described digital signal decoding is become transport stream; With
CA processor before two-way, be used for exporting for descrambling as described first signal from relevant code stream of appointed program and condition receiving control information thereof that descrambling is wanted in described transport stream extraction, receive through the appointed program of descrambling and be correlated with code stream, and other code stream in the transport stream and described secondary signal are outputed to described source decoder as described secondary signal.
3. according to the digital video broadcasting receiving equipment of claim 2, wherein said jockey is a compression express passway bus, comprise data wire, control line and clock line, described two-way preceding CA processor comprises compression express passway main equipment, be used for sending first signal by compression express passway bus according to first pre-determined data rate, and receive secondary signal by compression express passway bus according to second pre-determined data rate, and described condition receiving processor has compression express passway slave unit, be used for receiving first signal by compression express passway bus according to first pre-determined data rate, and send secondary signal by compression express passway bus according to second pre-determined data rate, wherein the extraction rate of first pre-determined data rate and two-way preceding CA processor mates, and second set rate and two-way preceding CA processor are to the output speed coupling of described source decoder.
4. according to the digital video broadcasting receiving equipment of claim 3, wherein compressing the express passway main equipment comprises: main equipment end transmit queue, main equipment end transmit queue control logic, the main equipment termination is received formation, the main equipment termination is received queue control logic, with main equipment end bus control module, wherein main equipment end transmit queue is under the control of main equipment end transmit queue control logic, receive relevant code stream of the appointed program that is extracted and condition receiving control information in real time, main equipment end bus control module obtains the relevant code stream of appointed program and condition receiving control information to send as first signal from main equipment end transmit queue, main equipment end bus control module receives secondary signal, the main equipment termination is received formation and is obtained code stream and write formation from main equipment end bus control module under the control of main equipment termination receipts queue control logic, for outputing to described source decoder;
Compression express passway slave unit comprises: slave unit end transmit queue, slave unit end transmit queue control logic, the slave unit termination is received formation, the slave unit termination is received queue control logic, with slave unit end bus control module, wherein slave unit end transmit queue receives the relevant code stream of appointed program through descrambling under the control of slave unit end transmit queue control logic, slave unit end bus control module obtains code stream as secondary signal and transmission from slave unit end transmit queue, slave unit end bus control module receives first signal, the slave unit termination is received formation and is obtained code stream and write formation from slave unit end bus control module under the control of slave unit termination receipts queue control logic, for descrambling.
5. according to the digital video broadcasting receiving equipment of claim 2, wherein said two-way preceding CA processor comprises demodulation multiplexer, is used for transport stream being resolved into code stream and extracting relevant code stream of the appointed program of wanting descrambling and condition receiving control information thereof.
6. according to the digital video broadcasting receiving equipment of claim 2, wherein said two-way before the CA processor comprise the code stream rebuilding module, be used for that other code stream and secondary signal are synthesized described appointed program and be marked as the transport stream of non-scrambling to output to described source decoder.
7. according to the digital video broadcasting receiving equipment of claim 1, wherein said condition receiving processor comprises the CPU module, is used for obtaining control word according to the condition receiving control information; And descrambling module, be used to use control word that appointed program associated code stream is carried out descrambling.
8. according to the digital video broadcasting receiving equipment of claim 7, wherein said condition receiving processor also comprises decryption engine, and wherein the CPU module utilizes decryption engine to decrypt control word according to the condition receiving control information.
9. condition receiving method that is used for the digital video broadcasting receiving equipment, described digital video broadcasting comprises receiving broadcast signal and converts the receiver of digital signal to, digital signal is converted to the condition receiving system of the transport stream that contains the descrambling code stream, with the described transport stream of reception, to its source decoder that carries out source coding and output to output equipment, described condition receiving system comprises the preceding guide module of source coding, condition receiving processor, and jockey, the method comprising the steps of:
By guide module before the source coding described digital signal decoding is become transport stream;
The preceding guide module of source coding extracts the relevant code stream of the appointed program of wanting descrambling from described transport stream and the condition receiving control information is exported for descrambling as first signal;
Condition receiving processor executive condition receives to be handled, wherein receive described first signal, according to wherein condition receiving control information described appointed program code stream is carried out descrambling, and before source coding guide module output through the relevant code stream of appointed program of descrambling as secondary signal;
Guide module receives described secondary signal before the source coding;
Guide module outputs to described source decoder with other code stream and secondary signal in the transport stream before the source coding.
10. according to the method for claim 9, wherein said extraction step also comprises the demultiplexing step, is used for transport stream is resolved into code stream for extraction.
11. according to the method for claim 9, wherein said output step also comprises the code stream reconstruction procedures, is used for that other code stream and secondary signal are synthesized described appointed program and is marked as the transport stream of non-scrambling to output to described source decoder.
12. according to the method for claim 9, wherein said condition receives treatment step and also comprises step: obtain control word according to the condition receiving control information; With the use control word appointed program associated code stream is carried out descrambling.
13. according to the method for claim 12, the step of wherein said acquisition control word also comprises the step that decrypts control word according to the condition receiving control information.
14. a condition receiving processor that is used for the digital video broadcasting receiving equipment, described digital video broadcasting receiving equipment comprise receiving broadcast signal and convert the receiver of digital signal to; Guide module before the source coding, be used for described digital signal decoding is become transport stream, extracting relevant code stream of the appointed program of wanting descrambling and condition receiving control information thereof from described transport stream exports for descrambling as first signal, receive through the appointed program of descrambling and be correlated with code stream as secondary signal, and with other code stream and secondary signal output in the transport stream; Receive described other code stream and secondary signal, to its source decoder that carries out source coding and output to output equipment; Jockey is used for that guide module transmits first signal to the condition receiving processor before the source coding, transmits secondary signal from condition receiving processor guide module before source coding, and described condition receiving processor comprises:
The device that is used to receive first signal and sends secondary signal;
The CPU module is used for obtaining control word according to the condition receiving control information; With
Descrambling module is used to use control word that appointed program associated code stream is carried out descrambling.
15. the condition receiving processor according to claim 14 also comprises decryption engine, wherein the CPU module utilizes decryption engine to decrypt control word according to the condition receiving control information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100012236A CN1642268A (en) | 2004-01-02 | 2004-01-02 | Machine-card separating condition receiving method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100012236A CN1642268A (en) | 2004-01-02 | 2004-01-02 | Machine-card separating condition receiving method and system |
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| CN1642268A true CN1642268A (en) | 2005-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2004100012236A Pending CN1642268A (en) | 2004-01-02 | 2004-01-02 | Machine-card separating condition receiving method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227138A (en) * | 2011-06-24 | 2011-10-26 | 北京数码视讯科技股份有限公司 | Conditional access module card and realization method thereof |
-
2004
- 2004-01-02 CN CNA2004100012236A patent/CN1642268A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227138A (en) * | 2011-06-24 | 2011-10-26 | 北京数码视讯科技股份有限公司 | Conditional access module card and realization method thereof |
| CN102227138B (en) * | 2011-06-24 | 2013-07-10 | 北京数码视讯科技股份有限公司 | Conditional access module card and realization method thereof |
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