双路信道无线视频传输系统设计  

Design of wireless video transmission system based on dual-channel

作　　者：祁晋[1] 王健[1] 季晓勇[1] 

机构地区：[1]南京大学电子科学与工程系,南京210093

出　　处：《计算机应用》2008年第11期2756-2758,2762,共4页journal of Computer Applications

摘　　要：为了在限制带宽和高误码率的公用移动通信网络上获得高质量的实时视频传输,提出了一种基于双路增强型数据速率GSM演进技术(EDGE)信道的无线视频传输原型系统。系统以高性能的数字信号处理器(DSP)为核心设计无线视频终端,采用H.264编码,利用双路EDGE传输信道,提供较高的传输带宽。运用多缓冲的发送机制和差错控制策略,将视频流发送到视频服务器。实验结果表明,CIF格式的图像传输能达到基本实时的要求。A novel prototype system to obtain real-time and high quality video transmission in wireless environment of high packet loss rate and limited bandwidth was introduced. The wireless terminal used high performance muhimedia Digital Signal Processor （DSP） as video processing and control core. Video signal was encoded by H. 264 and transmitted over dualchannel of Enhanced Data rate for GSM Evolution （EDGE） to the video services. A transmission method and an error conceal method based on dual-channel buffers were proposed. The experimental results show that the system can transmit real-time video （CIF） and achieve satisfactory reconstructed video.

关 键 词：无线视频传输 双路信道 差错隐藏 增强型数据速率GSM演进技术 

分 类 号：TP919.8[自动化与计算机技术]