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System and method for maintaining video frame and audio frame synchronous broadcasting

A technology of video playback and audio playback, which is applied to parts of TV systems, parts of color TVs, TVs, etc. It can solve the problems of not considering the uncertainty of audio output sampling rate, etc., and achieve the effect of improving the quality of audio and video playback

Inactive Publication Date: 2010-05-12
QUANTA COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The '776 patent, while improving display latency, still does not take into account the uncertainty of the audio output sample rate

Method used

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  • System and method for maintaining video frame and audio frame synchronous broadcasting
  • System and method for maintaining video frame and audio frame synchronous broadcasting
  • System and method for maintaining video frame and audio frame synchronous broadcasting

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Embodiment Construction

[0038] see image 3 , image 3 It is a functional block diagram of the audio / video player system 10 according to the first preferred embodiment of the present invention. The audio / video player system (Audio / video player system) 10 is used to keep all video frames (Video frame) and audio frames (Audio frame) Play synchronously. Such as image 3 As shown, the audio-visual playback system 10 includes a memory 12, a processor 14, an audio decoder 16, a video decoder 18, a bus 20, a storage interface 22, a storage device 28, an audio output interface 24, an audio output device 30, and a video output interface 26 , the video output device 32 . The audio output device 30 can be a speaker or other similar devices, and the video output device 32 can be a liquid crystal display (LCD) or other similar devices. It should be noted that the processor 14, the memory 12, the audio decoder 16, the video decoder 18, the storage interface 28, the audio output interface 24, the video output i...

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PUM

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Abstract

The present invention discloses a method that is used for maintaining synch play of the video frame and the audio frame in video player system and consists of the following procedures: (a) read the pre-set play time of audio in the audio frame and obtain the real audio play time of the audio frame; (b) calculate synch excursion time according to the pre-set video play time and the actual audio play time; (c) calculate adjusting video play time corresponding with the video frame according to the synch excursion time, pre-set play time of the video frame and pre-set video play time; and(d) optically display the video frame according to the adjusting video play time and present time. Thus, the video and the audio frame can maintain synch play.

Description

technical field [0001] The present invention relates to an audio / video player system, in particular to an audio / video player system and method for keeping video frames (Video frame) and audio frames (Audio frame) played synchronously. Background technique [0002] An audio-visual playback system must be able to play audio-visual files stored in the storage device. If the audio-visual data of the audio-visual file has been encoded, the audio-visual playback system must also use an appropriate audio or video decoder to decode the audio and video data before playing audio and video data. For an audio and video playback system, maintaining the synchronization between video and audio is a big challenge. [0003] Usually, the synchronization between video and audio is maintained by comparing and calculating the scheduled playback time of audio frames and video frames recorded in the video file with the current time, and playing audio frames or video frames at an appropriate time ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/928
Inventor 于明桂蔡宪明
Owner QUANTA COMPUTER INC