基于错误传播模型的非均等视频流丢失保护  

Unequal Loss Protection for Video Stream Based on Error Propagation Model

作　　者：王勇超[1] 孙钢[2] 鲁东明[2] 

机构地区：[1]浙江大学网络信息中心,杭州310027 [2]浙江大学人工智能所,杭州310027

出　　处：《计算机工程》2009年第18期221-223,233,共4页Computer Engineering

基　　金：国家自然科学基金资助项目(60432030)

摘　　要：提出一种适用于丢包网络、面向图像组(GOP)层的非均等视频流丢失保护方案。利用GOP中不同帧之间的非均等显著性,将不同数量前向错误校正包分配到GOP层的不同帧中。采用帧间包交错机制将突发包丢失分散到不同帧上,提高处理突发包丢失时的鲁棒性。仿真结果表明,在不同信道丢失模式下,该方案能提高视频接收质量。This paper proposes a unequal loss protection scheme for video stream. This scheme is suit for packet loss networks and Group of Picture（GOP） level oriented. By using the unequal significance in different frames in GOE different amounts of Forward Error Correction（FEC） packets are allocated to different frames on GOP level. It adopts inter-frame packets interlacing mechanism to make this scheme more robust against burst packet loss. Simulation results show that this scheme can improve video receiving quality under different channel loss patterns.

关 键 词：视频传输 前向错误纠正 非均等丢失保护 错误传播模型 

分 类 号：TN941.1[电子电信—信号与信息处理]