AVS视频的分层重传优化策略与实现  

Optimized Strategy and Implementation of AVS Video Layered Re-transmission

作　　者：吴佳莉[1,2] 李枚毅[1] 刘东华 

机构地区：[1]湘潭大学信息工程学院,湘潭411105 [2]上海中科计算技术研究所,上海201203

出　　处：《计算机工程》2009年第22期165-167,178,共4页Computer Engineering

基　　金：国家自然科学基金资助项目(60773047);湖南省自然科学基金资助项目(06JJ50106);湘潭大学博士基金资助项目(05QDZ23);上海市博士后科研计划基金资助项目(05R214207);上海市青年科技启明星计划基金资助项目(05QMX1447)

摘　　要：针对网络抖动等因素会影响图像质量的问题,采用差错控制与拥塞控制相结合的恢复技术,改进AVS视频数据在传输层的RTP打包,提出提高重传效率的AVS视频分层重传策略,通过令牌发放的方式控制数据包重传的次数解决重传导致网络拥塞问题。实验结果表明,在低带宽的网络下,该策略对AVS视频传输相对于无令牌发放的重传方式图像质量有一定的提高。Aiming at AVS video stream transmission on the lnternet becomes a new focus. However, factors such as network jitter will bound to affect image quality. In this paper, the restoration technology of the error control and congestion control are combined to be produced. The technology of AVS video data RTP packing is improved in the transmission layer. The strategy of AVS video layered transmission is proposed to improve the efficiency of re-transmission and the way of token payment which can control the time of data packets re-transmission is used to solve the network congestion problem led by re-transmission. Experimental results show that： in the low-bandwidth network, this policy for AVS video transmission has a better image quality than that of delivering without token.

关 键 词：差错控制 AVS视频 分层重传 RTP打包 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]