一种新的嵌入式的图像编码器  

A New Embedded Image Codec

作　　者：王琪[1] 郭雷[1] 

机构地区：[1]西北工业大学自动控制系,西安710072

出　　处：《计算机工程》2003年第22期167-169,共3页Computer Engineering

摘　　要：实现了一种基于小波变换的嵌入式编码，不但可以通过多量化器集合实现渐进传输，而且在每次量化下，利用比特平面的编码方式，对每个子带进行扫描，对子带内的0游程值编码，从而实现了两级渐进传输。不但算法的复杂度低于基于零树的算法和基于位率偏差优化的算法，而且性能也具有可比性。文章的算法是基于小波变换的，但是也可以应用到基于块的DCT变换中去。This paper describes a new embedded image coding approach based on wavelet transform. This algorithm works by raster scanning within bitplanes of subbands and progressively transmit the length of '0' run. Therefore, it involves much lower addressing complexity than other algorithms such as zerotree coding that requires the creation and ma+intenance of lists of dependencies across different decomposition levels. Despite its simplicity and the fact that these dependencies are not explicitly utilized, the algorithm presented here is competitive with the best enhancements of zerotree coding. Finally, although this technique is described here in the context of a wavelet coding system, it can also be applied in a block DCT framework.

关 键 词：小波变换 嵌入式图像编码 渐进传输 

分 类 号：TN919.81[电子电信—通信与信息系统]