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Audio-video frequency media data organization realizing method of supporting precision positioning

A technology for media data and precise positioning. It is used in TV, electrical components, selective content distribution, etc. It can solve the problems of fast file positioning, fast dragging, etc.

Inactive Publication Date: 2007-06-13
联合信源数字音视频技术(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This brings some troubles to the rapid positioning of files, the realization of scene jumps, and fast dragging

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0025] A method for organizing and implementing AVS audio and video media data that supports precise positioning, including the following steps:

[0026] 1) traverse the entire AVS program stream file, set up the index information of all I frames, and add this index information to the end of the AVS program stream file, and preload the index information when playing the AVS program stream; take C++ language as an example , "establish the index information of all I frames" in this step 1) is carried out by following steps: (1) index item definition:

[0027] Index information is defined as follows:

[0028] struct INDEXINFO{

[0029] LONGLONG llFilePoint; / / The position of the point defined by the index in the file;

[0030] LONGLONG llCurrPts; / / The first timestamp Pts immediately after the file pointer;

[0031] } ...

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Abstract

The method includes (1) traversing entire stream file of AVS program, building indexing information for all I frames, adding the indexing information to the end of the stream file of AVS program, and loading the indexing information before playing back AVS program stream; (2) based on operations such as fast locating, scene jumping, and quick dragging operations carried out by user to determine position and time of playing point; (3) using same proportion search method to find out PS packet containing I frame nearest to the playing point so as to find out initial position and timestamp of PS packet in AVS program stream file; (4) based on time and position of I frame of playing point, system locates relevant position of the AVS program stream automatically and carries out playing back operation. Advantages are: solving pinpoint issue, and guaranteeing standard AVS program stream.

Description

technical field [0001] The invention relates to an AVS media playing method related to digital audio and video codec standards used in the field of information technology, in particular to an AVS media data playing method capable of realizing precise positioning. Background technique [0002] The digital audio and video codec standard is the common basic standard of the digital audio and video industry, and has huge industrial demand. In the next five to ten years, my country's (high-definition) digital TV industry, high-density optical disk industry, broadband multimedia application and third-generation mobile communication industry will develop rapidly on a large scale and become an important industry group that affects the national economy. The 2008 Beijing Olympic Games will be a milestone in high-definition television broadcasting and mobile multimedia applications. [0003] AVS (Audio Video coding Standard), the digital audio and video codec technology standard formul...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N21/8547
Inventor 高文陈熙霖侯金亭魏勇刚呼大明杨长水
Owner 联合信源数字音视频技术(北京)有限公司
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