摘要
本文概述了一个基于ＰＣＩ总线的多媒体通信子系统的主要特征，讨论了硬件和软件的系统结构，高效实现了软件化视频编码器，实验表明，在公用电话网（ＰＳＴＮ）传输时，该子系统对ＱＣＩＦ格式视频序列可以得到每秒８帧的传送速率和可接受的视频质量，语音传送占用６．３ｋ～４．
In this paper,we outline the key technical characteristics of a multimedia communication subsystem based on PCI bus.The system architecture of hardware and software is discussed.The software-based video codec is realized efficiently.The experimental results of this subsystem transmitting over Public Switched Telephone Network(PSTN)show that acceptable video for QCIF resolution at 8 frames per second and fidelity voice that occupies 6.3k～4.1k channel band can be reached.
出处
《通信学报》
EI
CSCD
北大核心
1997年第12期46-50,共5页
Journal on Communications
关键词
多媒体通信
视频编码
语音编码
multimedia communication,video coding,audio coding
