基于MPEG-4 FGS视频的流式多播传输  

Adaptive stream multicast for MPEG-4 FGS video in heterogeneous networks

作　　者：姚军[1] 马满福[2] 胡正国[2] 

机构地区：[1]西北师范大学数信学院,甘肃兰州730070 [2]西北工业大学计算机学院,陕西西安710072

出　　处：《计算机工程与设计》2007年第3期608-610,734,共4页Computer Engineering and Design

基　　金：甘肃省科技攻关基金项目(2GS047-A52-002-04)

摘　　要：根据流体流量控制机制和MPEG-4 FGS编码视频流精细分级的特点,提出了流式多播方法,该方法中数据不用分层组织且没有加入实验,极大地减少了网络开销。同时,针对视频图像组帧间编码的依赖关系,修正了视频质量PSNR的计算公式,较好地评价视频网络传输质量。对分层多播和流式多播的对比仿真实验表明,流式多播的性能稳定、扩展灵活,便于大规模扩展应用。A novel adaptive stream multicast is proposed for MPEG-4 FGS video. Based on the fine-granularity property of MPEG-4 FGS video coding technology, the scheme tries to delivery multimedia multicast service over the heterogeneous networks in a similar way as that to transport liquid in pipelines, where the valves in pipelines adjust water flux to next pipeline. A modified method of computing PSNR, which considered the dependence of frames in one GOP, is used to evaluate the MPEG-4 FGS video transmission. Simulated results indicate that the scheme dispose the heterogeneity of networks and end-systems freely, with permanent stability, flexible scalability.

关 键 词：MPEG-4FGS 流式多播 分层多播 多播 

分 类 号：TN919.85[电子电信—通信与信息系统]