Method for Pushing Audio and Video Synchronously in a Video Conference

Abstract

The invention relates to the audio-video synchronization technology and discloses a method for synchronously pushing audios and videos in a video conference to realize true synchronous audio-video sharing. The method includes that sharing source equipment accesses a video conference terminal by means of a network, the video conference terminal initiates a sharing command to the sharing source equipment and an MCU (microprogrammed control unit), the sharing source equipment collects own audio-video data and pushes the data to the video conference terminal, and the video conference terminal sends audio-video data flow to the MCU which forwards the data flow to client terminals of participants; when the sharing source equipment collects the audios and videos, a time shaft is established and a time stamp is established for each collected data flow packet to guarantee time synchronization during playing; when the MCU forwards media stream data, a synchronous tracking thread is established to automatically track and synchronously update the media stream data; when the client terminals receive media stream for decoding playing, and synchronous playing is performed according to time shaft information. The method for synchronously pushing audios and videos in the video conference is suitable for synchronous sharing of audios and videos in a video conference system.

Description

technical field [0001] The invention relates to audio and video synchronization technology, in particular to a method for synchronously pushing audio and video in a video conference. Background technique [0002] With the continuous development of information technology, the network has become an important means of information dissemination. Based on remote control and operation interaction as a new interaction method, users can achieve the same interaction, viewing and operation in different places without being physically present. [0003] Desktop sharing is an important application in data sharing. It is often used in various network communication systems such as network video conferencing and IM instant messaging tools for document display, operation demonstration, and collaborative office. way important and effective supplementary way. [0004] At present, most of the screen sharing technologies used in video conferencing and IM instant messaging tools are realized by...

AI Technical Summary

Problems solved by technology

[0010] 1. In the above two schemes, the interface hard dual-stream mode is used to access the audio and video streams of the PC, which requires that the video conference terminal must support the above-mentioned interface. Reserving a special interface for this function will increase the cost of the video conference terminal

[0011] 2. Whether it is a VGA video cable, audio cable or HDMI cable, there are physical distance restrictions. For some large conference rooms, the connection between the video conference terminal and the podium may be limited by the length of the cable itself

[0012] 3. Both of the above two schemes use separate transmission of video and audio, which cannot guarantee the synchronization of audio and video

[0013] 4. Neither of the above two solutions can dynamically expand the audio and video synchronous push of multiple PCs

[0014] 5. The above two solutions need to be manually reconnected when replacing the pushed PC, which will cause the interruption of the meeting and cannot guarantee the continuity of the meeting

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