全数字视频对讲系统音视频信号的采集、编解码等信号处理是分别进行的,信号在传输过程中将产生不同的延时,这就导致在视频通话过程中出现唇音不同步的现象.提出一种基于非介入式测量技术的全数字视频对讲系统的唇音同步测试方法,适用于对音视频同步性能要求较高的实时全数字视频对讲系统,且不受通信接口、传输协议、加密通信技术等限制.%The collection,co-decode and other signal management of Video/audio signal of IP video intercom system are processed separately.Signal in transmission will cause different delay,this is why audio and video signal will not be synchronized during video and audio communication.This test claims a new non-intrusive measurement based lip sync test method for IP video intercom system.This method focuses on the IP audio/video intercom system which requires high quality of video and audio synchronization.Also thismethod will not limited by the physical port,transmission protocols and encryption communication.
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