MGS片层重要性分析及其应用

Analysis and application of slice sensitivity based on medium grain scalable

基于中粒度质量可伸缩(medium grain scalable,MGS)编码在可伸缩编码(scalable video coding,SVC)应用中的广泛性,在分析了MGS编码结构特点和问题的基础上,利用DCT系数分布特性提出MGS片层数据重要性的估计方法实现对MGS编码各片层重要性的估计。在此重要性估计方法的前提基础上,将之应用于指导可伸缩编码中的码流提取和容错编码。实验测试结果表明,MGS片层数据重要性估计方法的准确性和应用有效性,保障了视频码流质量,提高了码流提取效率。

MGS is widely applied in SVC. Based on analyzing the MGS coding mechanism, existed problems and characteristics of integer transform coefficients distribution, this paper proposed a method to evaluate the sensitivity of MGS slice and applied the proposed method to the application of bit-stream extraction and error resilient. Experiments show the accuracy and effective of MGS slice sensitivity evaluation. And the methods of bit-stream extraction and error resilient based on MGS slice sensitivity evaluation have better performance compared to the conventional methods of SVC.