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A method and device for switching encrypted TV programs

A technology for TV programs and videos, applied in the field of video processing, can solve the problems of low switching efficiency of encrypted TV programs, and achieve the effect of improving switching efficiency

Active Publication Date: 2018-06-12
HISENSE BROADBAND MULTIMEDIA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The embodiments of the present invention provide a method and device for switching encrypted TV programs, which are used to solve the problem of repeatedly performing the tasks of releasing resources required for playing encrypted TV programs and creating resources required for playing encrypted TV programs during the switching process of encrypted TV programs. process, resulting in inefficient switching between encrypted TV programs

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  • A method and device for switching encrypted TV programs
  • A method and device for switching encrypted TV programs
  • A method and device for switching encrypted TV programs

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] In the embodiment of the present invention, such as figure 2 As shown, the detailed method flow for the set-top box to switch encrypted TV programs is as follows:

[0042] Step 201: When it is determined that the TV program to be played is the first encrypted TV program, and it is not the first time to play the encrypted TV program, stop obtaining the ECM of the second encrypted TV program currently bound to the demultiplexing c...

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Abstract

The invention discloses a method and device for switching encrypted TV programs, which are used to solve the need to repeatedly perform the process of releasing resources required for playing encrypted TV programs and creating resources required for playing encrypted TV programs during the switching process of encrypted TV programs , leading to the problem of low switching efficiency of encrypted TV programs. The method is as follows: when it is determined that the television program to be played is the first encrypted television program and it is not the first time that the encrypted television program is played, stop obtaining the authorization control information ECM of the second encrypted television program currently bound to the demultiplexing channel, and decrypt the Bind the audio and video identifiers of the second encrypted TV program currently bound by the descrambler; bind the audio and video identifiers of the first encrypted TV program to the descrambler, using the first encrypted TV program The identification of the ECM configures the demultiplexing channel, and obtains the ECM of the first encrypted TV program in real time through the demultiplexing channel.

Description

technical field [0001] The invention relates to the technical field of video processing, in particular to an encrypted TV program switching method and device. Background technique [0002] At present, TV programs are divided into encrypted TV programs and non-encrypted TV programs. [0003] For non-encrypted TV programs, the set-top box only needs to demultiplex the audio and video TS streams, and decode and play the audio and video transport (Transport Stream, TS) streams to realize the TV program playback. [0004] For encrypted TV programs such as figure 1 As shown, the TS stream is processed at the front end as follows: [0005] The TS stream passes through the scrambler, and the scrambler uses a pseudo-random sequence to scramble the TS stream. The pseudo-random sequence is directly generated by the pseudo-random sequence generator (PRBSG), and the pseudo-random sequence generator is controlled by the control word (CW). The control word control generated by the modul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/434H04N21/4623H04N21/4405
CPCH04N21/434H04N21/4405H04N21/4623
Inventor 孟新红邓泽学
Owner HISENSE BROADBAND MULTIMEDIA TECH
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