一种基于对象的可伸缩小波编码器  

A Scalable Object-based Wavelet Coder

作　　者：黄波[1] 王煜坚[1] 

机构地区：[1]上海贝尔阿尔卡特股份有限公司,上海201206

出　　处：《无线电通信技术》2009年第1期35-38,共4页Radio Communications Technology

摘　　要：提出了一种基于任意形状对象的嵌入零树小波编码器。该编码器首先对任意形状对象做适形离散小波变换(SA-DWT),然后用适形预测嵌入零树小波(SA-PEZW)方法来同时编码变换后的形状和纹理信息,从而得到一个具有可伸缩性并且能够精确重构形状信息的码流。对标准测试库列进行了实验,结果证明该编码器具有较高的编码效率,性能良好。A rate-scalable object-based wavelet coder with implicit shape coding is proposed in this paper. A novel shape-adaptive PEZW （SA-PEZW） technique is invoked to encode the shape and texture information synchronously after the shape-adaptive DWT of the objects of arbitrary shapes .The output object-based bitstream is fully scalable and can reconstruct the original shape precisely. In this paper, we carry out the experiment on standard test sequence, and the results show that the proposed algorithm achieves rather efficient and effective performance.

关 键 词：基于对象 小波编码器 形状编码 纹理编码 SA—DWT SA—PEZW 

分 类 号：TN911.73[电子电信—通信与信息系统]