精细分级视频码流传输和容错性能的研究  

Error Resilience Codec for IP-based Video Delivery

作　　者：张婵[1] 梁凡[1] 肖自美[1] 丘海明[1] 

机构地区：[1]中山大学电子与通信工程系

出　　处：《计算机工程与应用》2004年第7期152-154,共3页Computer Engineering and Applications

基　　金：中山大学青年教师科研启动基金项目"IP网络下视频编码差错复原技术的研究"

摘　　要：精细分级编码是解决网络异构性的有效方法之一。编码输出码流的容错性能是衡量编码技术性能的重要指标。该文实现了一个支持精细分级编码的H.264编解码器,并对精细分级码流在IP网上的传输性能进行了研究。提出了一种精细分级码流容错传输打包策略。实验结果表明,该方案具有良好的容错性能。IP-based video communication has already become one of the most important parts of multimedia communi-cation services.Due to the feature of IP networks,IP-based video communication suffers from channel errors,such as bit errors and packets loss.Scalable coding is one of the important ways to resolve this problem.Fine granularity scalability(FGS)is a kind of new scalable coding method,which can provide very fine scalability.This paper implement s a H.264FGS codec,and studies the transport performance of FGS bit streams over IP networks.It also introduces an error resilient packing scheme for FGS bit streams.Simulation results show that the proposed packing scheme can improve the error resilience capability of the FGS bit streams significantly.

关 键 词：精细分级编码 基于IP的视频传输 容错性能 

分 类 号：TN919.81[电子电信—通信与信息系统]