质量可伸缩编码中增强层的帧内快速算法  

Fast intra prediction algorithm applied in QS enhancement layer

作　　者：汪大勇[1] 舒剑[2] 

机构地区：[1]襄樊学院数学与计算机学院,湖北襄阳441053 [2]江西财经大学电子商务系,江西南昌330013

出　　处：《通信学报》2011年第12期161-170,共10页Journal on Communications

基　　金：湖北省教育厅优秀中青年人才基金资助项目(Q20112608);襄樊学院青年基金资助项目(2010YA003)~~

摘　　要：提出了一种适合于质量可伸缩增强层的帧内快速编码算法。根据质量可伸缩编码结构,该算法利用层间相关性、率失真值与模式的关系、时间相关性和空间相关性预测可能的编码模式和编码顺序,同时结合量化参数与模式的关系、残差系数和率失真值进行提前终止。实验证明该算法编码速度能提高70%左右,同时对编码效率的影响也很小。A fast intra coding algorithm was proposed which was suitable for enhancement layer in quality salability. Base on the coding structure of quality scalability, our algorithm used the relationships between layers, the relationships between rate distortion and modes, and temporal and spatial relationships to predict the modes and coding order to be applied, with an early termination determined by the relationships between quantization parameters and modes, residual coefficients, and rate distortion. The experimental results show that the encoding speed of the proposed algorithm can be improved by 70%, with negligible coding loss.

关 键 词：编码结构 量化参数 率失真值 提前终止 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]