Method for filtering invalid programs of television

Abstract

The invention discloses a method for filtering invalid programs of a television. The method comprises a same-frequency-point data classification and arrangement storage stage, an invalid program filtering stage and a same-frequency-point judgment stage. The invalid program filtering stage comprises the steps of setting a black screen signal or forbidding video signal output, and resetting an RGB IO state to be 0; acquiring parameter information of the program P, setting decoding and playing; waiting for time T1, and stably outputting the signal; establishing and starting a signal detection thread THREAD 0, recording RGB_IO input values within the time T1, and if the RGB_IO input values within the time T1 are calculated, setting and storing a program filtering mark Skipp=0, the current program being a playable effective program; if yes, setting and storing a program filtering mark Skipp=1, wherein the current program is an invalid program which cannot be played; and continuing to play the next program, and re-filtering invalid programs. According to the method, R, G and B logic OR signals are detected through TTL RGB, the accuracy of judging invalid signals is improved, and the probability that valid signals are filtered out by mistake is reduced.

Description

technical field [0001] The invention relates to the technical field of digital television, in particular to a method for filtering invalid television programs. Background technique [0002] Usually, digital TV programs are not authorized by the operating organization, and many scrambled programs cannot be watched; and the scrambled programs are arranged in a disorderly manner in the program list, and the user must manually skip one by one to browse the programs that can be watched, which makes the user experience very poor ; [0003] At present, there are mainly three methods for automatically filtering invalid digital TV programs: [0004] Method 1: Query viewing rights and query user authorization information combined with smart cards to determine and filter out unauthorized programs; the defect is that clear stream programs and programs with inaccurate authorization information are filtered out by mistake; [0005] Method 2: Repeatedly query the output picture frame of ...

AI Technical Summary

Problems solved by technology

[0004] Method 1: Query viewing rights and query user authorization information combined with smart cards to determine and filter out unauthorized programs; the defect is that clear stream programs and programs with inaccurate authorization information are filtered out by mistake;

[0005] Method 2: Repeatedly query the output picture frame of the decoder for the waiting time T, and judge whether it is a valid program that can be played according to the number of picture frames; the disadvantage is that the process takes a long time and cannot filter out the black screen signal;

[0006] Method 3: Programs with the same frequency in the program list have to repeatedly set the TUNER FREQ parameters and wait for the lock. The process is unreasonable. Repeated settings for the same frequency will increase the waiting time for TUNER lock, and also lengthen the total process consumption time;

[0007] For the current filtering method, the signal judgment and recognition rate is not accurate, valid programs are mistakenly filtered out, or the filtering time is too long to meet user requirements

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