CN202488620U - Digital television host, conditional access module, and digital television - Google Patents
Digital television host, conditional access module, and digital television Download PDFInfo
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- CN202488620U CN202488620U CN 201120140411 CN201120140411U CN202488620U CN 202488620 U CN202488620 U CN 202488620U CN 201120140411 CN201120140411 CN 201120140411 CN 201120140411 U CN201120140411 U CN 201120140411U CN 202488620 U CN202488620 U CN 202488620U
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Abstract
The utility model provides a digital television host which comprises an interface which is used for accessing a conditional access module, a tuner, a demodulation module, a decoding module, a video display module, and an audio playing module. The utility model further provides the conditional access module which comprises an access used for being accessed into the digital television host, an entitlement message parsing module, a control word decryption module, and a descrambling module. The utility model further provides a digital television which comprises the above television host and the conditional access module. With the utility module, according to different descrambling needs in different areas, the corresponding conditional access module can be inserted to carry out correct descrambling processing.
Description
Technical field
The utility model relates to the digital television techniques field, is meant a kind of DTV main frame, Conditional Access Module and DTV especially.
Background technology
Original TV can not the decoded digital TV signal, and through the STB receiving digital television signal, and after descrambling and the decoding processing, generation analog signal (like the AV signal) is play through the TV that respective terminal (like AV terminal) is connected being transferred to it.
Along with the popularization of digital program, require TV can directly receive and handle digital television signal, realize that promptly the function of TV and STB is wholely set, thus the direct receiving digital television signal and carry out descrambling and decoding of TV.This directly TV of receiving digital television signal is called DTV.
Digital television signal is independently to be made and broadcasted by each regional digital television signal service provider, and therefore, the scrambling mode of comprovincial digital television signal can not exist difference.Because original STB is a product independently, and is provided by the digital television signal service provider of various places, thus its descrambling mode inevitable with its scrambling mode to corresponding, can carry out correct scramble process to digital television signal.
And the DTV after STB and TV functions be wholely set; Because it can be sold to each different area; The descrambling mode that is adopted in its DTV may be different with the scrambling mode of the digital television signal of institute sales territory; This has just caused, though DTV has the directly ability of receiving digital television signal, can't carry out correct scramble process to the digital television signal that receives.
The utility model content
In view of this, the main purpose of the utility model is to provide a kind of DTV main frame, Conditional Access Module and DTV, can insert corresponding Conditional Access Module and carry out correct scramble process according to the different descrambling requirements of different regions.
The DTV main frame that the utility model provides comprises:
The interface that is used for the access conditions receiver module;
Tuner, being used to receive high-frequency digital TV signal and frequency reducing is the intermediate frequency digital television signal;
Demodulation module is connected with said interface with tuner, and the intermediate frequency digital television signal that is used for that the tuner frequency reducing is gone out generates MPTS and transfers to said interface;
Decoder module is connected with said interface, is used for receiving the audio, video data behind the descrambling from said interface, and carries out decoding processing; With
Video display module and audio playing module are connected with decoder module, are used for the audio, video data after the decoding processing is play.
By last; Be provided for interface, tuner, demodulation module, the decoder module of access conditions receiver module on the DTV main frame, Conditional Access Module no longer is set, can be during fabrication; Need not consider the difference of the descrambling mode that each is regional; Through being provided for the interface of access conditions receiver module, make things convenient for the access of each regional Conditional Access Module, realize correct descrambling to each regional digital television program.
The Conditional Access Module that the utility model provides comprises:
Be used to be linked into the interface of DTV main frame;
The authorization message parsing module is connected with said interface, is used for receiving MPTS from said interface, and parses Entitlement Control Message and Entitlement Management Message;
The control word deciphering module is connected with the authorization message parsing module, is used for according to the private cipher key of smart card said Entitlement Control Message and Entitlement Management Message being deciphered, and decrypts control word; With
Descrambling module is connected with said interface with the control word deciphering module, is used for according to said control word the audio, video data of said MPTS being carried out scramble process, and exports said interface to.
By last, through manufacturing conditions receiver module independently, each area can make according to scrambling mode separately, and is linked into the DTV main frame through interface, the correct descrambling of the digital television program of realizing the TV main frame is received.Thus it is clear that, can not influence DTV in the sale of each department with popularize.
The DTV that the utility model provides comprises TV main frame and the Conditional Access Module that is connected through an interface with the TV main frame;
Said TV main frame comprises:
Tuner, being used to receive high-frequency digital TV signal and frequency reducing is the intermediate frequency digital television signal;
Demodulation module is connected with said interface with tuner, and the intermediate frequency digital television signal that is used for that the tuner frequency reducing is gone out generates MPTS and transfers to said interface;
Decoder module is connected with said interface, is used for receiving the audio, video data behind the descrambling from said interface, and carries out decoding processing; With
Video display module and audio playing module are connected with decoder module, are used for the audio, video data after the decoding processing is play;
Said Conditional Access Module comprises:
The authorization message parsing module is connected with said interface, is used for receiving MPTS from said interface, and parses Entitlement Control Message and Entitlement Management Message;
The control word deciphering module is connected with the authorization message parsing module, is used for according to the private cipher key of smart card said Entitlement Control Message and Entitlement Management Message being deciphered, and decrypts control word; With
Descrambling module is connected with said interface with the control word deciphering module, is used for according to said control word the audio, video data of said MPTS being carried out scramble process, and exports said interface to.
By on can find out owing to adopted the external of Conditional Access Module (CAM), therefore can insert corresponding CAM module according to actual needs, thereby can insert corresponding CAM and carry out correct scramble process according to the different descrambling requirements of different regions.
Wherein, said interface is the interface of PCMCIA standard or the interface of USB standard.
By last, adopt the interface of standard to be convenient to the interface unification on CAM module interface and the TV main frame is made according to standard, thus the CAM module that DTV can use different regions, different vendor to provide.
Wherein, said being connected to through I
2The C bus connects.
By last, adopt I in each module in the DTV
2The C bus connects, and has simplicity and validity.That is, because I
2C bus occupation space is very little, has reduced the space of circuit board and the quantity of chip pin, has reduced interconnected cost and can simplify the annexation between each module, is convenient to make.
Wherein, said video display module comprises: driver module and coupled display screen.Said driver module is the Low Voltage Differential Signal transport module, and said display screen is a liquid crystal display screen.
Wherein said audio playing module comprises: power amplifier and coupled loud speaker.
By last, can adopt the liquid crystal display screen of main flow, drive by the Low Voltage Differential Signal transport module, satisfy user's demand.
Description of drawings
Fig. 1 is the sketch map of the DTV that comprises TV main frame, Conditional Access Module of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model one specific embodiment.
Embodiment
Show the DTV of the utility model like Fig. 1, the Conditional Access Module (CAM) that comprises the TV main frame, is connected through inserting mode with the TV main frame.TV main frame and CAM module standard interface wherein with coupling; Thereby can the CAM module be inserted the TV main frame, realization CAM module is electrically connected with the TV main frame, and this interface can adopt the mode of golden finger; As adopt pcmcia interface, also can adopt interfaces such as USB.Wherein, Groove with the shell of CAM module coupling can be set on the television cabin, and for example, the CAM module can be made as the rectangular shape that an end has above-mentioned interface; Housing of TV set is provided with the groove of the indent of mating with this rectangular shape; The interface of the correspondence of this groove on the TV main frame, thus the CAM module is stretched into to housing of TV set inside through this groove, to insert above-mentioned interface.
Be described in detail in the face of the utility model down, in this example, the CAM module adopts pcmcia interface with the interface that is electrically connected of TV main frame.
Wherein, the TV main frame is used for receiving digital television signal, and digital signal is carried out demodulation, demultiplexing handle, and after carrying out scramble process by the CAM module that is connected with the TV main frame, play after decoding by the TV main frame again.The TV main frame comprises:
Tuner, being used for receiving high-frequency digital TV signal and frequency reducing is the intermediate frequency digital television signal.Wherein, the utility model has adopted the double high-frequency head of simulation, cable digital TV, terrestrial DTV one, to improve practicality and the applicability of TV.
Demodulation module is used for said intermediate frequency digital television signal is carried out demodulation, generates MPTS (TS) and transfers to connected pcmcia interface, comprises the audio, video data of the scrambling of demultiplexing in this MPTS.
Decoder module is used for receiving the audio, video data behind the descrambling from connected pcmcia interface, and carries out decoding processing, generates audio signal and vision signal.
Video display module is used to show said vision signal.Wherein, Video display module can be realized by driver module and display screen, can transmit (LVDS, Low Voltage Differential Signal) module for Low Voltage Differential Signal like driver module; Display screen can be liquid crystal display screen, shows said vision signal by LVDS module drive liquid crystal display screen.
Audio playing module is used to play said audio signal.Wherein, audio playing module can be realized by power amplifier and loud speaker.
Conditional Access Module (CAM), the smart card that it can insert the user is used for the TS MPTS that demodulation module generated of TV main frame is carried out scramble process.It comprises:
The authorization message parsing module; Be used for receiving the TS MPTS that demodulation module generated of TV main frame from pcmcia interface; And parse Entitlement Control Message (ECM, Entitlement Control Message) and Entitlement Management Message (EMM, Entitlement Management Message).
The control word deciphering module be used for reading the private cipher key (PDK) of user's smart card, and PDK deciphers to said ECM and EMM in view of the above, decrypts control word (CW).
Descrambling module is used for according to said control word (CW) audio, video data of the scrambling of the TS MPTS that receives from pcmcia interface being carried out scramble process, and the audio, video data behind the descrambling is transferred to pcmcia interface.
Electrical connection for each module of TV main frame can also connect through the mode of bus, for example all is connected to an I
2On the C bus.In addition, above-mentionedly can be connected to this I with the interface that is used for being connected with the CAM module
2On the C bus, also can adopt pcmcia bus to connect.Through this I
2The C bus realizes the information transmission between each module, and with the information transmission of CAM module.The concrete non-emphasis of the present invention of what kind of bus mode that adopts repeats no more.
Show circuit theory diagrams realizing the utility model like Fig. 2, among this figure, adopted the higher SOC chip of an integrated level,, realize the function of above-mentioned decoder module as adopting MSTAR 6i48 chip etc.This SOC chip is also integrated multiple interface as shown in Figure 2 comprises USB interface, RJ45 interface, and realizing carrying out the transmission of data through other interfaces, also integrated interfaces such as AV, YPbPr, VGA, HDMI are to pass through audio-video signal the access of this interface.Because the non-the utility model emphasis of this part repeats no more.
Below in conjunction with accompanying drawing 1, Fig. 2 the operation principle of the utility model is described, wherein, in use, above-mentioned CAM module should be inserted smart card, and this CAM module should be inserted in the pcmcia interface that the TV main frame provided, to be connected on the TV main frame.When receiving digital television signal is play, may further comprise the steps:
The first step: the tuner by the TV main frame receives the high-frequency digital TV signal, carries out down conversion process then, generates the intermediate frequency digital television signal.
Second step: by TV main frame demodulation module said intermediate frequency digital television signal is carried out demodulation, generate MPTS (TS) and transfer to pcmcia interface, comprise the audio, video data of the scrambling behind the demultiplexing in this MPTS.
The 3rd step: the authorization message parsing module by the CAM module receives above-mentioned TS MPTS from pcmcia interface, and parses ECM and EMM information, and through being transferred to the control word deciphering module.
The 4th step: read the private cipher key in user's the smart card by the control word deciphering module of CAM module, and in view of the above ECM and EMM are deciphered, decrypt control word (CW).
The 5th step: the descrambling module by the CAM module carries out scramble process according to said CW to the audio, video data that receives the scrambling the above-mentioned TS MPTS from pcmcia interface, and the audio, video data behind the descrambling is sent to pcmcia interface.
The 6th step: receive the audio, video data behind the descrambling by the decoder module of TV main frame from pcmcia interface, and carry out decoding processing, generate audio signal and vision signal.
The 7th step: video display module and the audio playing module by the TV main frame shows said vision signal and plays said audio signal respectively.
By on can find out because TV main frame and CAM module are not wholely set, realize connection by the way, promptly digital television signal is handled.The CAM module can be provided by the digital television signal service provider of each department, to adapt to the scrambling mode and the cipher mode that when making digital television program, are adopted of each department.Television set then can independently be made; Need not consider the different descrambling problems of different regions; Have uniform interface on TV main frame and the CAM module, thereby the CAM module of different regions is all applicable to the television set of conformance with standard interface; After inserting TV main frame the corresponding interface, the correct digital television signal to receiving of realization television set is handled.
The above is merely the preferred embodiment of the utility model, not in order to restriction the utility model, and for example; Corresponding memory process of caching data are set; Be provided with flash memory storage the description or the improvement of the common technologies such as program that will carry out, or the module of difference in functionality realized through an integrated chip, all within the spirit and principle of the utility model; Any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (15)
1. a DTV main frame is characterized in that, comprising:
The interface that is used for the access conditions receiver module;
Tuner, being used to receive high-frequency digital TV signal and frequency reducing is the intermediate frequency digital television signal;
Demodulation module is connected with said interface with tuner, and the intermediate frequency digital television signal that is used for that the tuner frequency reducing is gone out generates MPTS and transfers to said interface;
Decoder module is connected with said interface, is used for receiving the audio, video data behind the descrambling from said interface, and carries out decoding processing; With
Video display module and audio playing module are connected with decoder module, are used for the audio, video data after the decoding processing is play.
2. DTV main frame according to claim 1 is characterized in that, said interface is the interface of PCMCIA standard or the interface of USB standard.
3. DTV main frame according to claim 1 is characterized in that, said being connected to through I
2The C bus connects.
4. DTV main frame according to claim 1 is characterized in that, said video display module comprises: driver module and coupled display screen.
5. DTV main frame according to claim 4 is characterized in that, said driver module is the Low Voltage Differential Signal transport module, and said display screen is a liquid crystal display screen.
6. DTV main frame according to claim 1 is characterized in that, said audio playing module comprises: power amplifier and coupled loud speaker.
7. a Conditional Access Module is characterized in that, comprising:
Be used to be linked into the interface of DTV main frame;
The authorization message parsing module is connected with said interface, is used for receiving MPTS from said interface, and parses Entitlement Control Message and Entitlement Management Message;
The control word deciphering module is connected with the authorization message parsing module, is used for according to the private cipher key of smart card said Entitlement Control Message and Entitlement Management Message being deciphered, and decrypts control word; With
Descrambling module is connected with said interface with the control word deciphering module, is used for according to said control word the audio, video data of said MPTS being carried out scramble process, and exports said interface to.
8. Conditional Access Module according to claim 7 is characterized in that, said interface is the interface of PCMCIA standard or the interface of USB standard.
9. Conditional Access Module according to claim 7 is characterized in that, said being connected to through I
2The C bus connects.
10. a DTV is characterized in that, comprises TV main frame and the Conditional Access Module that is connected through an interface with the TV main frame;
Said TV main frame comprises:
Tuner, being used to receive high-frequency digital TV signal and frequency reducing is the intermediate frequency digital television signal;
Demodulation module is connected with said interface with tuner, and the intermediate frequency digital television signal that is used for that the tuner frequency reducing is gone out generates MPTS and transfers to said interface;
Decoder module is connected with said interface, is used for receiving the audio, video data behind the descrambling from said interface, and carries out decoding processing; With
Video display module and audio playing module are connected with decoder module, are used for the audio, video data after the decoding processing is play;
Said Conditional Access Module comprises:
The authorization message parsing module is connected with said interface, is used for receiving MPTS from said interface, and parses Entitlement Control Message and Entitlement Management Message;
The control word deciphering module is connected with the authorization message parsing module, is used for according to the private cipher key of smart card said Entitlement Control Message and Entitlement Management Message being deciphered, and decrypts control word; With
Descrambling module is connected with said interface with the control word deciphering module, is used for according to said control word the audio, video data of said MPTS being carried out scramble process, and exports said interface to.
11. DTV according to claim 10 is characterized in that, said interface is the interface of PCMCIA standard or the interface of USB standard.
12. DTV according to claim 10 is characterized in that, said being connected to through I
2The C bus connects.
13. DTV according to claim 10 is characterized in that, said video display module comprises: driver module and coupled display screen.
14. DTV according to claim 13 is characterized in that, said driver module is the Low Voltage Differential Signal transport module, and said display screen is a liquid crystal display screen.
15. DTV according to claim 10 is characterized in that, said audio playing module comprises: power amplifier and coupled loud speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120140411 CN202488620U (en) | 2011-05-05 | 2011-05-05 | Digital television host, conditional access module, and digital television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120140411 CN202488620U (en) | 2011-05-05 | 2011-05-05 | Digital television host, conditional access module, and digital television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202488620U true CN202488620U (en) | 2012-10-10 |
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ID=46963003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120140411 Expired - Lifetime CN202488620U (en) | 2011-05-05 | 2011-05-05 | Digital television host, conditional access module, and digital television |
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| Country | Link |
|---|---|
| CN (1) | CN202488620U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237256A (en) * | 2013-04-25 | 2013-08-07 | 郑州威科姆科技股份有限公司 | Digital television signal descrambling method based on USB (Universal Serial Bus) interface |
| WO2016037438A1 (en) * | 2014-09-11 | 2016-03-17 | 深圳国微技术有限公司 | Digital television receiving apparatus |
| CN112637650A (en) * | 2021-01-04 | 2021-04-09 | 国微集团(深圳)有限公司 | Condition receiving module |
-
2011
- 2011-05-05 CN CN 201120140411 patent/CN202488620U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237256A (en) * | 2013-04-25 | 2013-08-07 | 郑州威科姆科技股份有限公司 | Digital television signal descrambling method based on USB (Universal Serial Bus) interface |
| WO2016037438A1 (en) * | 2014-09-11 | 2016-03-17 | 深圳国微技术有限公司 | Digital television receiving apparatus |
| CN112637650A (en) * | 2021-01-04 | 2021-04-09 | 国微集团(深圳)有限公司 | Condition receiving module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151207 Address after: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Patentee after: haier group corporation Patentee after: Qingdao Haier Electric Appliance Co., Ltd. Patentee after: QINGDAO HAIER MULTI-MEDIA CO., LTD. Address before: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Patentee before: haier group corporation Patentee before: Qingdao Haier Electric Appliance Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |
|
| CX01 | Expiry of patent term |