Then , a comparison of multimedia synchronization between fifo model and audio - first model is given , and a novel h . 323 terminal model for multiplexing audio and video is proposed . furthermore , we packet the video data according to the maximum fragment size ( mfs ) , and analyze its effect on the jitter of audio - packet and video - packet respectively . finally , the scheme of multimedia synchronization is presented , including synchronization transmission at the transmitter and synchronization display at the receiver 首先,介紹了多媒體通信的媒體同步問題;然后,比較了fifo模型和語音優(yōu)先模型下音視頻媒體間的同步,并且通過對音視頻媒體單元排隊時延偏移的理論推導和實驗分析,提出了一種新的h . 323終端音視頻復用模型;接著,根據不同的最大分段長度( mfs )對視頻數據打包,分析其對音頻分組和視頻分組的時延抖動影響;最后,提出了一種多媒體通信中音視頻同步方案,包括多媒體數據在信源端的同步發(fā)送和在信宿端的同步播放等。