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。
关键词:
差错控制,
AVS视频,
分层重传,
RTP打包
Abstract: Aiming at AVS video stream transmission on the Internet 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.
Key words:
error control,
AVS video,
layered re-transmission,
RTP packing
中图分类号:
吴佳莉;李枚毅;刘东华. AVS视频的分层重传优化策略与实现[J]. 计算机工程, 2009, 35(22): 165-167.
WU Jia-li; LI Mei-yi; LIU Dong-hua. Optimized Strategy and Implementation of AVS Video Layered Re-transmission[J]. Computer Engineering, 2009, 35(22): 165-167.