基于AVS1-P2的快速帧内预测算法  

Rapid Intra-predication Algorithm Based on AVS1-P2

作　　者：夏鹏[1] 宋雪桦[1] 陈景柱[1] 陈丽莲[1] 

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212013

出　　处：《计算机工程》2010年第24期223-225,共3页Computer Engineering

基　　金：镇江市2008年产学研基金资助项目(zjczcxy200806)

摘　　要：AVS1-P2标准参考软件rm52j的RDCost算法能很好地平衡视频编码质量和编码效率,但RDCost的计算复杂度大,占用了大量的编码时间。针对该问题,提出一种快速预测算法,利用帧内8×8亮度块亮度变化的方向性和邻块间预测模式的相关性进行帧内预测。实验证明,与全搜索算法相比,快速预测算法的编码时间平均节省了17%左右,且PSNR和比特率几乎不变。The reference soft rm52j for AVSI-P2 standard adopts RDCost algorithm to balance the coding quality and coding rate pretty well to achieve better efficiency, but it takes plenty of coding time because of high computational complexity. Aiming at this problem, a fast algorithm is proposed to reduce candidate prediction modes with increasing predication speed according to the directivity of luminance variation within a 8×8 block and the correlation of adjacent blocks. Experimental results show that the fast algorithm can save coding time by 17% on average with code rate increasing slightly and PSNR almost unchanged.

关 键 词：帧内预测 模式判决 率失真优化 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]