无线网络视频传输差错控制技术研究  

Error Control For Video Transmission Over Wireless Network

作　　者：黎俊伟[1] 高传善[1] 

机构地区：[1]复旦大学

出　　处：《微计算机信息》2007年第01S期225-227,共3页Control & Automation

摘　　要：随着多媒体、网络技术以及移动通信的发展,视频通信的应用成了必然的趋势。传输的视频需要进行压缩,冗余信息的丢失使视频数据在传输中抵抗信道误码的能力变得十分脆弱。不幸的是,无线网络信道中,误码的产生、数据的丢失总是难以避免。当网络拥塞时更容易造成突发性的分组丢失现象,引起图像质量严重下降,必须采用有效的差错控制技术进行处理。本文提出并实现了一种适合于无线网络环境下视频传输的差错控制方法,它包括一个基于丢包检测的流量自适应算法,编码端的宏块重排序的算法和解码端的自适应的差错掩藏算法。实验结果表明,在无线网络环境下,采用本文提出的差错控制方法能够有效提升视频传输的质量。With the fast development of multimedia, network technique and mobile communication, the application of video communication has become more and more popular.video needs compression, which makes video data with highly sensitivity to error code in the transmission. Unfortunately, error code and loss of data can＇ t be avoided in wireless network, so it is necessary to make use of the error control techniques to transmit video over wireless network. An error control technique for transmitting video streaming is proposed in this paper, including an adaptive rate control method, macro block reordering process in the encoder and an improved error concealment algorithm in the decoder.The result of experiment shows that the proposed methods can improve the quality of video transmission over wireless network effectively.

关 键 词：视频通信 差错控制 流量自适应 差错掩藏 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]