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Audio and video composite device and method and device for synchronizing audio and video thereof

A technology for audio and video synchronization and composite equipment, which is applied to color TV parts, TV system parts, TVs, etc. Synchronize, achieve the effect of synchronization

Active Publication Date: 2010-05-19
VIMICRO ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an audio-video composite device and its audio-video synchronization method and device, which can solve the problem of audio-video out-of-synchronization of the audio-video composite device

Method used

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  • Audio and video composite device and method and device for synchronizing audio and video thereof
  • Audio and video composite device and method and device for synchronizing audio and video thereof
  • Audio and video composite device and method and device for synchronizing audio and video thereof

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Embodiment 1

[0035] refer to Picture 1-1 , is a flow chart of a method for synchronous audio acquisition by an audio-video composite device according to this embodiment.

[0036] S1101, turn on the device and prepare to collect audio data;

[0037] S1102, initialize the audio channel;

[0038] Initialize the audio channel in the audio-video composite device;

[0039] S1103, collecting audio data and sending it into the audio buffer;

[0040] Collect audio data after initializing the audio channel, and send the collected audio data to the audio buffer;

[0041] S1104, set the audio success signal A_OK=TRUE;

[0042] After the audio data is sent to the audio buffer, set the audio A_OK=TRUE, that is, set the audio synchronization flag as a successful signal;

[0043] S1105, judging whether V_OK=TRUE is established while A_OK=TRUE;

[0044] When judging that the audio synchronous identification is a successful signal, whether the video synchronous identification is set to a successful si...

Embodiment 2

[0064] With respect to the foregoing method embodiments, the present invention also provides an audio-video composite device and an embodiment of an audio-video synchronization device thereof.

[0065] The main application scenario of the device embodiment is a USB camera. After collecting synchronous audio and video data, it is transmitted to a computer through a USB cable and saved as an audio and video data file. In addition, it can also be applied to mobile phone video chat.

[0066] refer to figure 2 , which is a structural diagram of an audio-video synchronization device for an audio-video composite device according to this embodiment, and the device includes:

[0067] Audio initialization unit 201, configured to initialize audio channels;

[0068] Audio data collection unit 202, for collecting audio data after initializing the audio channel;

[0069] Audio buffer unit 203, is used for receiving described audio data, sets audio synchronous identification as successful...

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Abstract

The invention provides an audio and video composite device and a method and a device for synchronizing audio and video thereof. An audio buffer zone and a video buffer zone are respectively prepared for an audio channel and a video channel; audio data and video data acquired are respectively sent to corresponding buffer zones; and whether the audio data and the video data are synchronous is judged by setting a synchronization identifier so as to ensure to acquire synchronous audio data and video data and avoid a phenomenon that the audio data and the video data are not synchronous because the time required for initiating the audio and video channels are different. The synchronous audio data and video data are acquired, and the synchronization of sound and images is ensured, and the acquired synchronous audio and video data are transmitted.

Description

technical field [0001] The invention relates to the technical field of audio and video signal processing, in particular to an audio and video composite device and an audio and video synchronization method and device thereof. Background technique [0002] With the development of science and technology, people pay more and more attention to audio and video recording with high image quality. Audio and video composite equipment can satisfy people's wishes. Cameras that provide both audio and video, etc. [0003] When audio and video composite equipment is collecting data, the most troublesome thing is that the audio and video are out of sync. The so-called audio-video out-of-sync (also known as voice-lip out-of-sync) is: when the out-of-sync time between the sound and the image exceeds 400 milliseconds, people will feel that the sound and the mouth shape cannot correspond. The occurrence of out-of-sync audio and video will greatly reduce the user experience. Therefore, how to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/928H04N9/802
Inventor 曹玉弟
Owner VIMICRO ELECTRONICS CORP
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