摘要
针对音视频流在网络上同步传输的难点问题,分析了基于Internet的网络教学中音视频流和计算机屏幕流传输的特点,提出了MPEG-4音视频流和屏幕流同步传输算法,采用仿真系统详细实现了一套采用实时传输协议的同步传输方案。通过开发的实际系统验证,有效地解决了将教师授课的音频和视频信息以及教师授课机的屏幕信息同步直播这一问题,达到了较好的使用效果。
Aimed at solving the difficult problem of synchronous transmission of audio/video MPEG-4 steam on the Interact, the characteristic of audio/video MPEG-4 stream and screen stream transmission in the online teaching is analyzed. Meanwhile a novel solution for the simultaneous transmission of audio/video MPEG-4 stream and screen stream is proposed, which is virtually a specific solution to the synchronous transmission with RTP （realtime transport protocol） by adopting a mock system. Thus it solves the problem of simultaneously transmitting the audio/video stream and the screen stream. The effectiveness and good results of this method are testified by the real system.
出处
《计算机工程与设计》
CSCD
北大核心
2007年第19期4686-4689,共4页
Computer Engineering and Design
基金
国家科技型中小企业技术创新基金项目(04C26224210717)
关键词
时间戳
实时传输协议
同步传输
音频流
视频流
屏幕流
直播
time stamp
RTP
synchronous transmission
audio stream
video stream
screen stream
broadcast
