文件名称：understanding lip sysn
文件大小：236KB
文件格式：PDF
更新时间：2016-12-26 10:54:24
rtp,voip
Video conferencing endpoints generally take two approaches to achieve lip sync: ■ Poor Man’s lip sync —This method assumes that delays in the end-to-end media paths are known and constant. It relies on packet arrival times for synchronization. ■ Common Reference lip sync —This method assumes that delays in the end-to-end media paths are not easily known and might vary. It relies on a common reference timebase for both audio and video streams.