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Method and system for synchronizing audio and video data

A technology of audio data and video data, which is applied to the parts of color TV, TV, color TV, etc. It can solve problems such as unsatisfactory, unsatisfactory viewing quality, unsmooth picture or dialogue, etc., and achieve a smooth synchronization process.

Inactive Publication Date: 2008-01-16
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current practice, when the synchronization error is serious, it is often necessary to pause or skip a lot of video frames to compensate for a long period of time. In this way, users will easily notice this situation and are dissatisfied with the viewing quality (for example, the screen or dialogue will not be smooth), therefore, the existing practice is quite unsatisfactory and there is still a lot of room for improvement

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  • Method and system for synchronizing audio and video data
  • Method and system for synchronizing audio and video data
  • Method and system for synchronizing audio and video data

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Embodiment Construction

[0035] FIG. 1 shows a schematic diagram of a system 100 according to a first embodiment of the present invention. As shown in Figure 1, the system 100 is a multimedia playback system, including a demultiplexer (demultiplexer / demuxer) 110, an audio decoding module 120, a video decoding module 130 and a decision module 140, wherein the demultiplexer 110 is coupled to The audio decoding module 120 and the video decoding module 130 are used to receive a data stream (data stream) and divide the data stream into audio data and video data; the audio decoding module 120 has at least a fast forward function or a slow forward function; the video decoding module 130 has at least a fast playback function or a slow playback function; and the decision module 140 is coupled to the demultiplexer 110, the audio decoding module 120 and the video decoding module 130 .

[0036] Audio data has embedded / associated audio playback time information (called audio presentation time stamp (audio present...

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Abstract

A system for synchronizing video data and audio data for an optical disc is disclosed. The system includes a demultiplexer, for splitting a data stream into audio data and video data, the audio data having an embedded / associated audio playback time information and the video data having an embedded / associated video playback time information; an audio decoding block, having at least fast forward or slow forward functionality, for decoding the audio data to output decoded audio data; a video decoding block, having at least fast forward or slow forward functionality, for decoding the video data to output decoded video data; and a decision block, for sending at least an adjustment signal, wherein the adjustment signal is for instructing either the video decoding block or the audio decoding block to perform fast forward or slow forward operations.

Description

technical field [0001] The present invention relates to video and audio synchronization, in particular to a method and a system (METHOD AND SYSTEM FOR SYNCHRONIZING) for selectively adjusting video data and audio data to synchronize video data and audio data by existing fast and slow playback functions AUDIO AND VIDEO DATA SIGNALS). Background technique [0002] Generally speaking, a multimedia playback system, such as a digital versatile disc (DVD) player, can be used to read audio signals and video signals on the disc, and then process them to present audio-visual (audio-visual, AV) data; when the audio signal and video signal are not synchronized, it will cause data inconsistency, such as the situation where the dialogue is heard before the picture in the movie or the picture appears before the dialogue, and when the synchronization error (sync error) can be ignored when the synchronization error is small, however, when the synchronization error is large, it will cause a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/60H04N7/62H04N9/802
CPCH04N21/42646H04N21/4307H04N21/4325H04N21/2368H04N21/4341H04N21/4305H04N21/43072
Inventor 张北辰陈建豪
Owner MEDIATEK INC
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