CN105516740A - Method for achieving safety control over digital television programs without scrambling - Google Patents
Method for achieving safety control over digital television programs without scrambling Download PDFInfo
- Publication number
- CN105516740A CN105516740A CN201610076178.3A CN201610076178A CN105516740A CN 105516740 A CN105516740 A CN 105516740A CN 201610076178 A CN201610076178 A CN 201610076178A CN 105516740 A CN105516740 A CN 105516740A
- Authority
- CN
- China
- Prior art keywords
- pid information
- deciphering
- digital television
- pmt table
- digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
Abstract
The invention relates to the technical field of digital television programs, and provides a method for achieving safety control over digital television programs without scrambling. The method includes the steps that PID information of the front end digital television programs is encrypted, and the encrypted PID information is packaged in a PMT; the PMT and a digital television program code stream are received through terminal equipment by means of a digital television network, and the PMT is decrypted according to a decrypting library to obtain the PID information. According to the provided technical scheme, the PID information is encrypted, and encryption parameters are changed at regular time, so that transmission safety of the digital television programs is ensured.
Description
Technical field
The present invention relates to digital television program technical field, particularly a kind of not scrambling realizes the controlled method of digital television program safety.
Background technology
In recent years, terrestrial DTV developed rapidly, and customer volume is also more and more huger, and terrestrial DTV network is a kind of open network, and national requirements must have free program to be public broadcasting, and therefore fail safe is an important problem.
How could design the digital television system of a safety? present most mode is all guarantee system safety by cas system.If but cas system ciphered program, then need user charges to buy program, and add broadcasting and TV input and terminal access threshold, and program can meet popular needs for user freely play also to meet; If so do not encrypted all with clear stream transmission, terminal market can be caused again chaotic, and illegal box at will can watch Digital Television, affects the safe broadcast of broadcasting and TV to the controlled of user and program.Therefore, be badly in need of in ground wave digital television system wanting a solution neither to adopt the scrambling mode of CAS, but effective and rational security management and control can be carried out to the program of transmission again simultaneously, both meet the public welfare demand of broadcasting and TV to the free Program Transport of user, meet again broadcasting and TV to user security management and control and the operation sexual demand to the reasonable management and control of user terminal.
Summary of the invention
[technical problem that will solve]
The present situation that the present invention is directed to current DTMB industry proposes a kind of based on PMT encryption rule conversion programme information and terminal deciphering and the controlled method of the digital television program safety play of seamless connection program.
[technical scheme]
The present invention is achieved by the following technical solutions.
The present invention relates to a kind of not scrambling and realize the controlled method of digital television program safety, comprising:
The pid information of front-end digital TV programme is encrypted, and the pid information after encryption is encapsulated in pmt table, pmt table after encapsulation and digital television program code stream are sent to digital TV network, the deciphering parameter of described pmt table changes according to preset algorithm, when the deciphering parameter of pmt table changes, send pid information transformation directive to digital TV network;
The deciphering storehouse including deciphering parameter transplanted by terminal equipment, and the deciphering parameter in described deciphering storehouse is arranged according to described preset algorithm;
Terminal equipment receives pmt table and digital television program code stream by digital TV network, to be decrypted to obtain pid information according to deciphering storehouse to pmt table, arranges filter carry out program broadcasting according to deciphering the pid information obtained;
Terminal equipment, when playing TV programme, if receive pid information transformation directive, then re-starts deciphering according to deciphering storehouse to pid information and obtains up-to-date pid information, arranges filter carry out program broadcasting according to deciphering the pid information that obtains.
As one preferred embodiment, the pid information after encryption is encapsulated in pmt table by the mode of private setting descriptor by described front end.
As another preferred embodiment, described pid information comprises Audio PID information and video pid information.
[beneficial effect]
The technical scheme that the present invention proposes has following beneficial effect:
(1) pid information of front end of the present invention program is encrypted, and be encapsulated in pmt table by the mode of private setting descriptor, and the deciphering parameter of pmt table changes according to preset algorithm, illegal terminal normally can not watch program owing to cannot obtain the pid information of program, when the deciphering parameter of pmt table changes, illegal terminal also cannot obtain up-to-date pid information, therefore normally cannot watch program.
(2) when front end program pid information changes, for legal terminal, up-to-date effective program pid data is deciphered and is got on its backstage automatically again, then by arranging filter, program is play, can to ensure in playing process without card, without blank screen, user does not have and abnormal watches experience; For illegal terminal, it cannot decrypt program, and cannot accomplish not block after the program pid information of front end changes time, not blank screen.
Accompanying drawing explanation
Fig. 1 realizes the front-end processing flow process of the controlled method of digital television program safety for not scrambling that embodiments of the invention one provide;
Fig. 2 realizes the terminal processes flow process of the controlled method of digital television program safety for not scrambling that embodiments of the invention one provide.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, carry out clear, complete description by the specific embodiment of the present invention below.
Embodiment one
The not scrambling that inventive embodiments one provides realizes the controlled method of digital television program safety and comprises front-end processing flow process and terminal processes flow process.
Fig. 1 realizes the front-end processing flow process of the controlled method of digital television program safety for not scrambling that the embodiment of the present invention one provides.As shown in Figure 1, this handling process comprises the following steps.
Step S11: the pid information obtaining digital television program.
Step S12: the pid information of digital television program is encrypted.
Wherein, pid information comprises Audio PID information and video pid information.
Step S13: the pid information after encryption is encapsulated in pmt table.
In step S13, the pid information after encryption is encapsulated in pmt table by the mode of private setting descriptor by front end.
Step S14: the pmt table after encapsulation and digital television program code stream are sent to digital TV network.
Step S15: when the deciphering parameter of pmt table changes, sends pid information transformation directive to digital TV network.
In step S15, by preset timer, the deciphering parameter of pmt table is changed at Preset Time, when the deciphering parameter of pmt table changes, front end sends pid information transformation directive to digital TV network.
Fig. 2 realizes the terminal processes flow process of the controlled method of digital television program safety for not scrambling that the embodiment of the present invention one provides.As shown in Figure 2, this handling process comprises the following steps.
Step S21: the deciphering storehouse including deciphering parameter transplanted by terminal equipment.
In step S21, the deciphering parameter in deciphering storehouse is arranged according to described preset algorithm, by pid information transformation directive and search deciphering storehouse and can obtain the deciphering parameter of up-to-date pmt table.
Step S22: terminal equipment receives pmt table and digital television program code stream by digital TV network.
Step S23: according to deciphering storehouse pmt table is decrypted and obtains pid information.
In step S23, terminal equipment receives pmt table and digital television program code stream by digital TV network, to be decrypted to obtain pid information according to deciphering storehouse to pmt table, arranges filter carry out program broadcasting according to deciphering the pid information obtained.
Step S24: if receive pid information transformation directive, then again decipher.
In step S24, terminal equipment, when playing TV programme, if receive pid information transformation directive, then re-starts deciphering according to deciphering storehouse to pid information and obtains up-to-date pid information, arranges filter carry out program broadcasting according to deciphering the pid information that obtains.
As can be seen from the above embodiments, the pid information of embodiment of the present invention front end program is encrypted, and be encapsulated in pmt table by the mode of private setting descriptor, and the deciphering parameter of pmt table changes according to preset algorithm, illegal terminal normally can not watch program owing to cannot obtain the pid information of program, when the deciphering parameter of pmt table changes, illegal terminal also cannot obtain up-to-date pid information, therefore normally cannot watch program.In addition, when front end program pid information changes, for legal terminal, up-to-date effective program pid data is deciphered and is got on its backstage automatically again, then by arranging filter, program is play, can to ensure in playing process without card, without blank screen, user does not have and abnormal watches experience; For illegal terminal, it cannot decrypt program, and cannot accomplish not block after the program pid information of front end changes time, not blank screen.
Need to illustrate, the embodiment of foregoing description is a part of embodiment of the present invention, instead of whole embodiment, neither limitation of the present invention.Based on embodiments of the invention, those of ordinary skill in the art, not paying the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
Claims (3)
1. not scrambling realizes the controlled method of digital television program safety, it is characterized in that comprising:
The pid information of front-end digital TV programme is encrypted, and the pid information after encryption is encapsulated in pmt table, pmt table after encapsulation and digital television program code stream are sent to digital TV network, the deciphering parameter of described pmt table changes according to preset algorithm, when the deciphering parameter of pmt table changes, send pid information transformation directive to digital TV network;
The deciphering storehouse including deciphering parameter transplanted by terminal equipment, and the deciphering parameter in described deciphering storehouse is arranged according to described preset algorithm;
Terminal equipment receives pmt table and digital television program code stream by digital TV network, to be decrypted to obtain pid information according to deciphering storehouse to pmt table, arranges filter carry out program broadcasting according to deciphering the pid information obtained;
Terminal equipment, when playing TV programme, if receive pid information transformation directive, then re-starts deciphering according to deciphering storehouse to pid information and obtains up-to-date pid information, arranges filter carry out program broadcasting according to deciphering the pid information that obtains.
2. not scrambling according to claim 1 realizes the controlled method of digital television program safety, it is characterized in that the pid information after encryption is encapsulated in pmt table by the mode of private setting descriptor by described front end.
3. not scrambling according to claim 1 realizes the controlled method of digital television program safety, it is characterized in that described pid information comprises Audio PID information and video pid information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610076178.3A CN105516740A (en) | 2016-02-03 | 2016-02-03 | Method for achieving safety control over digital television programs without scrambling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610076178.3A CN105516740A (en) | 2016-02-03 | 2016-02-03 | Method for achieving safety control over digital television programs without scrambling |
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| Publication Number | Publication Date |
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| CN105516740A true CN105516740A (en) | 2016-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610076178.3A Pending CN105516740A (en) | 2016-02-03 | 2016-02-03 | Method for achieving safety control over digital television programs without scrambling |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101360226A (en) * | 2007-12-14 | 2009-02-04 | 华亚微电子（上海）有限公司 | Transmission control method of digital television transmission stream and apparatus thereof |
| US7751564B2 (en) * | 2002-01-02 | 2010-07-06 | Sony Corporation | Star pattern partial encryption method |
| JP2013135415A (en) * | 2011-12-27 | 2013-07-08 | Mitsubishi Electric Corp | Digital broadcast reception device |
| CN104935960A (en) * | 2015-06-09 | 2015-09-23 | 四川长虹电器股份有限公司 | Seamless connection method between local media resource and digit television |
-
2016
- 2016-02-03 CN CN201610076178.3A patent/CN105516740A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7751564B2 (en) * | 2002-01-02 | 2010-07-06 | Sony Corporation | Star pattern partial encryption method |
| CN101360226A (en) * | 2007-12-14 | 2009-02-04 | 华亚微电子（上海）有限公司 | Transmission control method of digital television transmission stream and apparatus thereof |
| JP2013135415A (en) * | 2011-12-27 | 2013-07-08 | Mitsubishi Electric Corp | Digital broadcast reception device |
| CN104935960A (en) * | 2015-06-09 | 2015-09-23 | 四川长虹电器股份有限公司 | Seamless connection method between local media resource and digit television |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160420 |
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| RJ01 | Rejection of invention patent application after publication |