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A processing method for transport stream video and audio synchronization

A processing method and audio synchronization technology, which is applied in the field of video and audio editing, can solve problems such as video and audio out of synchronization, affecting the final program broadcast effect, etc., to improve program quality, avoid the inconsistency between video start time and audio start time, and improve The effect of user experience

Inactive Publication Date: 2018-05-04
CHINA DIGITAL VIDEO BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, if the start time of the video and audio at the beginning of the TS stream file is inconsistent, and the processing is not good, it will cause the video and audio after the code stream splicing to be out of sync, which will affect the effect of the final program broadcast

Method used

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  • A processing method for transport stream video and audio synchronization

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Embodiment Construction

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0016] The embodiment of the present invention provides a processing method for transport stream video and audio synchronization, such as figure 1 , Including the following steps:

[0017] Step 101: Receive transport stream TS file data;

[0018] The TS file includes multiple elementary stream ES;

[0019] Step 102: Analyze the TS file, obtain the first video ES that can be processed in the TS file, and record the start display time tag VideoValidStartPTS and the ...

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Abstract

The present invention discloses a method for processing video and audio synchronization of transport streams, by obtaining the first video ES that can be processed in the TS file, and recording the start display time tag VideoValidStartPTS and the start decoding time tag of the video ES VideoValidStartDTS; analyze the TS file, and obtain the audio ES in the TS file in sequence; compare whether the display time tag PTS of the audio ES is greater than or equal to the VideoValidStartPTS; if not, discard the audio ES; if so, record the The audio ES is the first audio ES, record the PTS as AudioValidStartPTS; send the VideoValidStartPTS, VideoValidStartDTS, AudioValidStartPTS and TS files to the TS synthesizer to generate the target TS file, and realize the start time of the transport stream TS video and audio The synchronization effectively avoids the inconsistency between the start time of the video and the start time of the audio at the beginning of the TS stream file, improves the program quality, and improves the user experience.

Description

Technical field [0001] The invention relates to the field of video and audio editing, in particular to a processing method for transport stream video and audio synchronization. Background technique [0002] With the enhancement of computer processing power, video and audio processing technology has also made great progress. In the process of video and audio processing, video and audio editing is the most commonly used technique. [0003] In the digital TV system, the analog video and audio signals are sampled, quantized, and compressed to form a basic stream ES according to the MPEG-2 standard. The basic stream ES is a continuous stream without segmentation. The basic code stream is divided into segments, and the packaged basic code stream PES formed by packing the corresponding header file is added. The PES packet and the packet may be discontinuous. During transmission, the PES packet is subdivided into a fixed-length transport stream TS (TransportStream) or a variable-length p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/434H04N21/8547
Inventor 夏永宏
Owner CHINA DIGITAL VIDEO BEIJING