Windows CE视频电话的音视频同步
首发时间:2009-02-06
摘要:在基于SIP协议的嵌入式视频电话系统中,要保证通话质量,既要考虑媒体流的连续播放问题(媒体内同步),也必须考虑音视频间的同步问题。由于网络环境的复杂性和动态性,会给媒体传输带来不同程度的延迟抖动。系统结合RTP/RTCP协议、速率可控音视频编码技术(AMR-WB,H.263),提出了基于嵌入式系统的音视频同步方案,提高了同步效果。
关键词: 视频电话 音视频同步 SIP RTP/RTCP AMR-WB H.263
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The Audio-Video Synchronous For Video Phone In Windows CE System
Abstract:In order to ensure the quality of communication, it requires a consideration of both the continuous play of media streaming and the audio-video synchronous play, in the embedded video phone based on the Sip protocol. Because the complex and dynamic network environment brings transmission delay jitter with various degree. Such a system propose a synchronous solution based on the RTP/RTCP protocol taking account of the features of the embedded system and the controllable technology about audio and video coding in speed(AMR-WB,H.263). In the end, the audio-video synchronous has been enhanced.
Keywords: Video phone audio-video synchronous SIP RTP/RTCP AMR-WB H.263
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