Device and method for synchronizing audio and video coding labial sound

Abstract

The invention relates to the technical field of broadcast television and specifically to a device and method for synchronizing audio and video coding labial sound. The device comprises an audio and video signal input module, a video encoding module, an audio encoding module, a code stream output module, a system control module, a power module, an audio time delay module, and an audio and video synchronizing module. The system control module is electrically connected with the audio and video signal input module, the video encoding module, the audio encoding module, the code stream output module, the power module, the audio time delay module, and the audio and video synchronizing module. The audio time delay module is provided with a built-in FIFO buffer. The device is simple in structure, easy to use, achieves accurate audio and video labial sound synchronization by applying the audio time delay module and the audio and video synchronizing module to a conventional audio and video encoder, may stably perform synchronization even after long-time operation, satisfies the front-end broadcast demands of various levels of broadcast television networks, greatly increases work efficiency, and reduces operation cost.

Description

technical field [0001] The invention relates to the technical field of broadcasting and television, in particular to a device and method for solving video and audio coding lip synchronization. Background technique [0002] With the rapid popularization of digital TV, operators' cable networks have adopted digital transmission technology to transmit broadcast and TV programs. At the same time, the source of the program is required to be a stream signal encoded by video and audio compression. For programs whose signal source is analog or baseband digital video and audio, the It needs to be re-encoded into a stream signal. [0003] Some of the existing video and audio encoders use video encoding and audio encoding to complete in one encoding chip, and can perform precise lip synchronization processing in the same chip, but there are also many encoding chips that can only perform video encoding, but audio Encoding needs to be completed with an external dedicated audio encoding ...

AI Technical Summary

Problems solved by technology

[0003] Some of the existing video and audio encoders use video encoding and audio encoding to complete in one encoding chip, and can perform precise lip synchronization processing in the same chip, but there are also many encoding chips that can only perform video encoding, but audio Encoding needs to be completed with an external dedicated audio encoding chip. At this time, since video encoding and audio encoding are performed independently, there is no strict video and audio synchronization. During normal work, if there are some abnormalities in video or audio, it will cause The clock signal error of video or audio, after a long period of accumulated errors, will cause lip synchronization problems, so it is necessary to introduce lip synchronization processing technology into the design

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