RDWT域全相位子带运动补偿视频编码方法

Video Codec Based on RDWT Domain all Phase Subbands Motion Compensation

当前小波视频编码技术的一个研究热点是如何提高运动补偿的效率.提出了一种基于RDWT(冗余离散小波变换)域的全相位子带运动补偿视频编码方法.运动补偿过程在参考帧和当前帧的RDWT域进行,使用提出的RDWT小波块结构,利用RDWT域的全相位子带信息提高运动补偿效率.在RDWT域形成预测数据后变换到空域得到预测帧和残差帧,对残差帧进行DWT变换,SPECK小波系数编码.实验表明提出的方法获得了较好的编码效率.

Now one hot spot in the research of video codee based on wavelet is how to improve the efficiency of motion compensation. This paper proposed one video eodee based on all phase subbands motion compensation in redundant discrete wavelet transform （RDWT） domain. This method carries out motion compensation in the RDWT domain of current and reference frames with proposed structure named RDWT wavelet bolck, so all phase subbands information could be utilized for improving efficiency of ME/MC. The predicted data in RDWT domain is then transformed into spatial domain as the predicted frame, to get the spatial residual error frame. Applying DWT to the spatial residual error frame, the DWT coefficients are coded by SPECK. The experimental results prove that the codec can produce encoded stream with higher PSNR.