Method and system for descrambling and digital TV receiver
A descrambling, audio and video technology, applied in the field of descrambling, can solve the problems of inability to descramble, cannot guarantee the descrambling of each set of programs, cannot fully detect the normal descrambling of programs, and achieve the effect of improving the stability of descrambling
Inactive Publication Date: 2013-02-13
SHENZHEN COSHIP ELECTRONICS CO LTD
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Problems solved by technology
Due to the instability of different CAMs, when the CAM card descrambles multiple programs, if a certain program cannot be descrambled, the existing technology must manually deal with it
Since the monitoring video can only achieve real-time monitoring of the currently playing program, it cannot guarantee that each set of output programs will be descrambled. When it is stable, the re-descrambling of the program must be achieved through manual operations such as manual insertion and removal of the CAM card
This has great limitations: whether the program is descrambled is only guaranteed by the stability of the CI module, and the receiver can neither fully detect whether all the output programs are descrambled normally, nor can it perform self-recovery processing when descrambling is abnormal
Method used
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[0031] The invention discloses a descrambling method and system of a digital television receiver and the digital television receiver, which can ensure normal descrambling of multiple sets of program signals output by the front end, and improve the descrambling stability of the digital television receiver.
[0032] Wherein, the digital television receiver may be a digital television set-top box.
[0033] Such as figure 1 As shown, it is a schematic structural diagram of a descrambling system of a digital television receiver according to an embodiment of the present invention. The descrambling system of the digital television receiver may include a CPU descrambling processing module 11 and a real-time detection module 13, wherein the real-time detection The module 13 further includes an audio and video PID (packet ID) register 131 and a monitoring module 132 . Wherein, the real-time detection module 13 may be realized by FPGA (Field-Programmable Gate Array, Field-Programmable G...
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The invention discloses a method and a system for descrambling and a digital TV receiver, which can detect a module in real-time and capture each TS packet. The method comprises the following steps: in case that an audio stream and a video stream which need to descramble program existing in the TS packet, determining whether the descrambling is finished; if a plurality of consecutive packets are not descrambled normally, then setting the position of the descrambling state corresponding to the program stream into an un-descrambling state; setting multi-program descrambling for a CPU descrambling processing module, and sending the audio PID and the video PID of the set program to a real-time detection module; and circularly reading the PID register of the real-time detection module through the CPU descrambling processing module, if the descrambling positions of the audio stream and the video stream are determined to be in the un-descrambling state and a CAM card is in normal connection, then resending the audio stream and the video stream to a CI module, and in case that the audio stream and the video stream can still not be descrambled after consecutive sending for a plurality of times, resetting the CAM card. Therefore, the invention can improve the descrambling stability of the digital TV receiver.
Description
technical field [0001] The invention relates to a descrambling technology of a digital television receiver, in particular to a CI card descrambling technology of a digital television receiver. Background technique [0002] With the popularization and use of household-related digital appliances, such as digital TV set-top boxes and digital TV all-in-ones, people's lives are becoming more and more enriched. For example, taking a digital TV set-top box as an example, the digital TV set-top box provides users with a large number of TV programs, making it convenient for users to choose and watch favorite TV programs. Digital TV set-top boxes are now widely used to watch digital TV programs, and at the same time provide some value-added services, such as e-mail, stock browsing and so on. [0003] In digital TV, TS (Transport Stream) code stream is often used to transmit data. Since TS code stream has a strong ability to resist transmission errors, currently the code stream transm...
Claims
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IPC IPC(8): H04N21/434H04N21/435
Inventor 黄颋挺程文伙肖琳杰
Owner SHENZHEN COSHIP ELECTRONICS CO LTD