Synchronization method of audio and video

An audio and video synchronization and video technology, applied in the field of video conferencing, can solve the problems of high cost, insufficient compatibility, scalability, and out-of-sync audio and video, and achieve the effect of low cost, good compatibility and scalability

Active Publication Date: 2017-05-31
FUJIAN STAR NET WISDOM TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0003] Most of the existing solutions to audio and video out-of-sync are based on proprietary protocols, which lack compatibility and scalability, and the cost of implementation is relatively high

Method used

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  • Synchronization method of audio and video
  • Synchronization method of audio and video
  • Synchronization method of audio and video

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Embodiment Construction

[0031] see figure 1 Shown, a kind of audio-video synchronization method, realize audio-video synchronization based on the RTP timestamp and the NTP timestamp of the RTCP sender message;

[0032] The method is specifically: for audio and video, obtain RTP and NTP data of audio and video from two consecutive RTCP sender packets, and obtain audio and video according to the obtained RTP and NTP data of audio and video Corresponding timestamp frequency; (need to be updated every time an SR packet is received)

[0033] Get the NTP timestamp Audio_SRNTP, Video_SRNTP of the latest audio and video from the RTCP sender packet (ie the SR packet), and the RTP data of the latest video to obtain the basic value Video_RTPTime of the RTP timestamp of the video;

[0034] Every time an audio RTP packet is obtained, the RTP timestamp Audio_TRUERTP of the audio RTP packet is obtained, and the video reference RTP timestamp Video_TRUERTP based on the audio RTP is obtained according to the basic va...

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Abstract

The present invention provides a synchronization method of audio and video, which realizes synchronization of audio and video based on RTP timestamp and NTP timestamp of the message of the RTCP sender. The method can be implemented with low cost, is of good compatibility and expansibility; the method can adjust the scope of synchronization of audio and video according to different requirements of synchronization of audio and video.

Description

technical field [0001] The invention relates to the technical field of video conferencing, in particular to an audio and video synchronization method. Background technique [0002] Audio and video synchronization control is a research hotspot in the field of video conferencing. Whether audio and video are synchronized or not has a great impact on the experience of video conferencing. Currently, there are many solutions to audio and video out-of-sync, such as multiplexing method (packet transmission of audio and video frames), synchronous marking method (labeling related audio and video frames, and playing according to the label when playing), etc. [0003] Most of the existing solutions to audio and video out-of-sync are based on proprietary protocols, which lack compatibility and scalability, and the cost of implementation is relatively high. Therefore, this patent application provides a method for realizing audio and video synchronization based only on the RTP timestamp a...

Claims

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Application Information

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IPC IPC(8): H04N5/04H04N7/15H04L29/06
CPCH04L65/80H04N5/04H04N7/15H04L65/65
Inventor 林鑫铭洪剑平陈锦辉
Owner FUJIAN STAR NET WISDOM TECH CO LTD
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