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Processing method for synchronizing transport stream and audio/video

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

Inactive Publication Date: 2012-11-14
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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  • Processing method for synchronizing transport stream and audio/video

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

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

[0017] Step 101, receiving transport stream TS file data;

[0018] The TS file includes a plurality of elementary streams 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 ...

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Abstract

The invention discloses a processing method for synchronizing transport stream and audio / video. The method comprises the following steps of obtaining a first video ES (elementary stream) capable of being processed in a TS (transport stream) document, recording a start display time mark Video Valid Start PTS (program transport stream) of the video ES; analyzing the TS document to obtain audio ESs in the TS document in sequence; comparing whether the display time mark PTS of the audio ES is greater than or equal to the Video Valid Start PTS; if not, discarding the audio ES; if so, recording the audio ES as a first audio ES, and recording the PTS as an Audio Valid Start PTS; sending the Video Valid Start PTS, Video Valid Start DTS, Audio Valid Start PTS and the TS document to a TS synchronizer, so that the synchronization of the starting time of the transport stream TS video and audio can be realized; and the problem that the video starting time and the audio starting time at the starting of the TS document are inconsistent is effectively solved, thus, the program quality is improved and the user experience is improved.

Description

technical field [0001] The invention relates to the field of video and audio clipping, 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 technology. [0003] In the digital TV system, the analog video and audio signals are sampled, quantized and compressed to form the basic code stream ES according to the MPEG-2 standard. The basic code stream ES is a continuous code stream without segmentation. Divide the basic code stream into segments, and add the corresponding header files to form the packaged basic code stream PES, and the PES packets may be discontinuous. During transmission, the PES packet is segmented into a fixed-length transport stream TS (TransportStream) or a variable-length progr...

Claims

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Application Information

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