基于方向提升小波变换的多描述视频编码  

Multiple Description Video Coding Based on Directional Lifting Wavelet Transform

作　　者：陈锦春[1] 蔡灿辉[1] 

机构地区：[1]华侨大学信息科学与工程学院,泉州362021

出　　处：《计算机工程》2009年第22期162-164,175,共4页Computer Engineering

基　　金：国家自然科学基金资助项目(60772164);福建省自然科学基金资助项目(A0710009)

摘　　要：提出一种基于方向提升小波变换的多描述可分级视频编码方法,该方法能增强视频编码的容错性和网络自适应性。对视频序列中的每一帧图像按梅花下采样产生2个子序列,对每个子序列分别进行三维小波可分级视频编码形成2个描述。为解决传统二维小波变换方法对梅花下采样图像编码效率低的问题,引入方向提升小波变换对图像进行空域分解,提出5模式方向提升小波变换以进一步提高编码效率。实验结果证明了该方法的有效性。A multiple description scalable video coding based on directional lifting wavelet transform is proposed, it can enhance the error-resilient and network-adaptive ability of video coding. It divides each frame into two subframes to form two subsequences by using quincunx down-sampling, each subsequence is coded by a scalable 3D wavelet video coder to form one description. Tu improve coding efficiencies of the subframes, directional lifting wavelet transform is used to perform spatial decomposition. A five mode directional lifting is introduced to improve coding efficiency. Experimental results prove the validity of the proposed algorithm.

关 键 词：多描述可分级编码 梅花下采样 三维小波视频编码 平面预测模式 图像插值 

分 类 号：TN919.8[电子电信—通信与信息系统]