Method for automatically controlling subtitle playing based on synchronous signal monitoring

Abstract

The invention discloses a method for automatically controlling subtitle playing based on synchronous signal monitoring. The method comprises the following steps: acquiring a synchronous signal state of a current subtitle board; determining whether the synchronous signal state is a locked state or a lost state; if the synchronous signal is in a lost state, outputting a black field signal; if the synchronous signal is in a locked state, outputting a subtitle signal; and repeatedly acquiring the synchronous signal state of the current subtitle board at intervals of 0.5-1.5 seconds. According to the method, the monitoring of the state of the synchronous signal does not need manual intervention, and once the subtitle generator detects the loss state of the synchronous signal, the subtitle generator board is automatically controlled to stop outputting the subtitle signal. After the subtitle generator detects that the synchronous signal is locked, the subtitle generator board is automaticallycontrolled to recover subtitle signal output, and automatic monitoring and fault processing are achieved.

Description

technical field [0001] The invention relates to the field of media playing, in particular to a method for automatically controlling subtitle playing based on synchronous signal monitoring. Background technique [0002] In broadcasting and TV broadcasting, the TV screen is usually formed by superimposing program video screens and subtitles. The subtitle signal is superimposed on the front of the video signal, so that viewers can watch TV programs with rich pictures. Among them, the program video is output by the video playback device, and the subtitle is output by the subtitle machine. The two signals are superimposed by key mixing or switching equipment. When superimposing subtitles and video signals, it is necessary to complete the synchronous locking of the output signals of the two devices through the synchronization signal to ensure that the subtitles are superimposed to the correct position and effect. Therefore, the synchronous signal plays a vital role in the superp...

AI Technical Summary

Problems solved by technology

[0003] The manual monitoring method used in the existing technical solutions cannot achieve uninterrupted monitoring, and because the reasons for the loss of synchronization signals are diverse, the probability of occurrence is low, and the time of occurrence is uncertain, so the manual monitoring method is labor-intensive. Missing detection, untimely intervention and other shortcomings, once the output signal of the subtitle machine cannot be superimposed on the TV screen due to the offset or loss of the external synchronization signal of the subtitle machine, it will cause a bad broadcast accident

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