MPEG-2系统运动图像质量评价技术的研究  

STUDY OF MOVING IMAGE QUALITY EVALUATION BASE ON MPEG-2 SYSTEM

作　　者：李桂苓[1] 王楠楠[1] 张强[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2001年第5期573-576,共4页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目 (69772 0 4 0 )

摘　　要：结合 MPEG- 2系统特点和人的视觉特性 ,研究了评价运动图像质量的两个失真量 :三维加权信噪比 ( WSNR)和三维加权块效应 ( WBSNR) .实验表明 ,加权后的客观测试指标 ,较物理峰值信噪比 ( PSNR) ,与主观评价结果的相关性更高 .The evaluation of image quality includes subjective evaluation and objective test.The subjective evaluation is complex and its results always change,and the development of objective evaluation is necessary.The perfection of the objective test depends on the comprehension of TV system matched by human visual characteristics.Combining the character of MPEG 2 system and human visual characteristics,the authors of this paper studied deeply two distortions about the evaluation of moving inage:three dimensional weighted SNR (WSNR) and three dimensional weighted block distortion (WBSNR).The experimental results show that compared with the physical peak signal to noise ratio (PSNR),correlation of the objective test parameter in this paper with the subjective evaluation the result is greatly improved.

关 键 词：数字电视 图像质量评价 视觉特性 信噪比 块效应 MPEG-2系统 运动图像 

分 类 号：TN949.197[电子电信—信号与信息处理] TN941.1[电子电信—信息与通信工程]