一类MPEG-4 FGS流视频传输的质量定义及算法  

The Quality Definition and an Optimal Algorithm for MPEG-4 FGS Video Streaming

作　　者：黄天云[1] 

机构地区：[1]西南民族大学计算机科学与技术学院,成都610041

出　　处：《计算机学报》2006年第5期751-759,共9页Chinese Journal of Computers

基　　金：国家民委科研项目基金(05XN09);西南民族大学博士创新基金(234138)资助.

摘　　要：基于PSNR(MSE)指出了MPEG4FGS流视频客观质量和质量变化指标的相关定义,讨论了视频分段场景基础上的质量最优化问题,通过状态迁移图和动态规划给出FGS流视频的最优传输策略,并且用试验数据对FGS流视频的优化传输的控制粒度及实时传输算法进行了对比分析.Since MPEG-4 FGS（Fine Granularity Scalability） coding has been dedicated to IP vid- eo streaming, a strict definition of its obiective quality and quality variation is required, in order to provide efficient transmission of FGS-coded video and an attainable subjective quality percep- tion {or end users. Based on MSE（Mean Square Error） and PSNR（Peak Signal-to-Noise Ratio）, an obiective quality and quality variation definition for FGS-coded video is introduced in this paper, and a quality optimal problem of scene in video segments is formulated and solved using the state transfer graph and dynamic programming. The optimal transmission policy is also obtained and compared with a real-time transmission algorithm. Different aggregation levels（segmentation granularity）of video segments for optimal transmission are also examined by experimental data. Simulation results validate the proposition.

关 键 词：MPEG-4 FGS 质量定义 传输策略 视频分段 场景 状态迁移 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]