基于小波变换的新型帧内模式预测快速选择算法  

A new fast selection algorithm of intra-frame mode prediction based on wavelet

作　　者：罗国成[1] 余彪[1] 刘进[1] 王家友[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《微型机与应用》2013年第18期32-34,共3页Microcomputer & Its Applications

摘　　要：为了进一步提高视频的压缩比,提出了一种基于小波变换的新型帧内模式预测快速选择算法。该算法利用小波变换后的低频子图结合改进后的Pan算法作帧内模式选择,由此判断宏块中每个4×4子块可能的预测模式。实验结果表明,该方法在保证了视频图像良好效果的情况下,H.264/AVC帧内编码速度得到显著提高。Aiming at increasing impressing ratio, a fast selection algorithm of intra-frame mode prediction based on wavelet is implemented. Firstly, an improved method of Pan is proposed on the basis of analyzing Pan algorithm. Then, intra-frame mode pre- diction is executed by improved Pan in wavelet domain. The experimental results show that the speed of intra-code is improved significantly when the quality of video is kept.

关 键 词：小波变换 帧内预测 Pan算法 快速选择 

分 类 号：TN911.73[电子电信—通信与信息系统]