【作者】 李哲； 房胜； 徐轲； 李环环；

【Author】 Li Zhe+, Fang Sheng, Xu Ke, Li Huanhuan Shandong University of Science and Technology, Qingdao 266510, China

【机构】 山东科技大学信息科学与工程学院；

【摘要】 本文在基于MCTF开环结构的小波视频编码中引入Wyner-Ziv编码机制,提出了一种全新的编码结构——MCTF-WZ小波视频编码结构,对时域低频帧和时域高频帧分别使用不同的编码方式编码,其中时域低频帧经过空域分解后利用BISK算法编码。而对于时域低频帧利用参考帧和当前帧之间的相关性采取不同的编码方式,相关性强的区域采用Wyner-Ziv编码,相关性弱的区域经过空域分解后利用BISK算法压缩,在中低码率下取得了与H.264和MC-EZBC相当甚至更好的编码效率。更多还原

【Abstract】 This paper introduces the scheme of Wyner-Ziv coding into the wavelet video coding based on the MCTF open loop. And it proposes the wavelet video coding based on MCTF-WZ, which is a new coding structure. Frames of low frequency and frames of high frequency in temporal domain are encoded by using the distinct coding manner, and the former is encoded by the BISK algorithm after spatial analysis. But the latter is encoded by two distinct way based on the correlation between the reference frame and the current frame. In this way, regions which have high correlations are coded by Wyner-Ziv coding, and regions which only have short correlations are coded by BISK after discrete wavelet transform. The coding efficiency of this scheme is close to H.264 and MC-EZBC or even better.更多还原