Audio and video synchronous control method based on moving picture experts group (MPEG)-2

An MPEG-2, audio and video synchronization technology, applied in the field of audio and video decoding, can solve the problems such as STC cannot be recovered, PCR packet construction is difficult, audio and video synchronization cannot be synchronized, etc., to reduce the load and simplify the implementation difficulty.

Inactive Publication Date: 2012-07-04
FUJIAN STAR NET EVIDEO INFORMATION SYST CO LTD
View PDF5 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, some embedded video decoding chip solutions on the market can only support TS streams. For PS stream videos, transcoding is required. Due to the limitation of embedded system performance, it is very difficult to perfectly realize the structure of PCR packets. Difficult, misalignment or lack of PCR will cause STC to be unable to recover, so that the audio and video synchronization missing reference cannot be synchronized

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Audio and video synchronous control method based on moving picture experts group (MPEG)-2
  • Audio and video synchronous control method based on moving picture experts group (MPEG)-2
  • Audio and video synchronous control method based on moving picture experts group (MPEG)-2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0022] The definition of English abbreviation among the present invention is:

[0023] TS flow, Chinese means transport stream, English full name is transition stream.

[0024] PS stream, Chinese means program stream, English full name is Program Stream.

[0025] PES stream, the Chinese meaning is the basic package stream, and the English full name is Packetized ElementaryStream.

[0026] PCR, Chinese means program clock reference, English full name is Program ClockReference.

[0027] SCR, Chinese means system clock reference; English full name is System ClockReference.

[0028] STC, Chinese means system timing clock; English full name is System Time Clock.

[0029] PTS, Chinese means display time stamp; English full name is Presentati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an audio and video synchronous control method based on a moving picture experts group (MPEG)-2. According to the method, own information dependence on a program stream (PS) and a transition stream (TS) is avoided, and system timing clock (STC) calibration is directly performed on a program timing stream (PTS) information in a packetized elementary stream (PES), so that a synchronization effect can be achieved under the condition that a program clock reference (PCR) or a system clock reference (SCR) are not accurate. According to a solution that the PS is required to be converted to the TS or the TS is required to be converted to the PS, a PCR packet of the TS or a SCR packet of the PS are not required to be rebuilt in a conversion processing program, so that the load of a system processor is reduced, and the program implementation difficulty is reduced.

Description

technical field [0001] The invention relates to the field of audio and video decoding, in particular to an audio and video synchronization control method based on MPEG-2 video streams. Background technique [0002] The Chinese invention patent application number is: "200610017021.X", and the patent name is: "Audio and Video Signal Synchronization Method". Correlation of the two mid- and low-frequency systems with the smallest distance in the quantized coefficient block, embedding the compressed audio coding bits into one of the coefficients, and then performing the same procedure on the coefficient block embedded in the compressed audio bits as in the original video coding system Variable length coding or arithmetic coding can obtain the coded bit stream of the mixed signal, and the embedded video coefficient can be restored in the decoder according to the proposed audio bit, which provides key technical support for the audio and video signal synchronization system. [0003...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/56H04N7/26H04N7/24
Inventor 吴方方刘旺邹应双
Owner FUJIAN STAR NET EVIDEO INFORMATION SYST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap