The Solution of Subtitle Unlocked Synchronization in Television Signal Broadcast Based on Image Comparison
Aiming at the problem of unlock synchronization of subtitles in television broadcast signals,a solution based on image comparison is proposed.In this scheme,a subtitling machine is added to the broadcasting system to keep the same time as the original subtitling machine.The two subtitling machines superimpose subtitles to the primary and secondary signals respectively,and control the automatic switcher to switch according to the comparison results by comparing the image content of the two signals.Once the signal switch occurs,the system will issue a voice alarm prompt,so that the operator can find the problem and deal with it in time.This solution can effectively reduce the risk of broadcast accidents caused by the loss of title lock,and has practical value.
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