范文编号:TX301 范文字数:9996,页数:24 摘要 算术编码是一种无失真的编码方法,能有效地压缩信源冗余度,使编成的码率趋于信源的熵。该编码的卓越性能使其在多媒体领域得到了越来越广泛的应用:H.263,MPEG以及最新的图像压缩标准JPEG2000中均采用它作为编码算法。文中阐述了图像压缩的研究背景和意义,接着介绍了图像压缩的原理和基本方法,其中算术编码是基本方法中的一种。再引出该算法在JPEG2000中的应用模块和在数字图像压缩处理中的应用,介绍了数字图像压缩的基本结构。同时给出了一个具体的算术编/解码实例来解释编/解码的原理。 ABSTRACT Arithmetic coding is a method of lossless data compressing,it can effectively reduce the redundancy of the source,which making the coding rate inclines to the entropy of the source.The excellent performance of arithmetic coding makes it widely used such as in H.263,MPEG and the next still imlage-compressing stall-dard-JPEG2000.This article talks about the background and significance of the study on the image compression,and then it introduces the principle of image compression and basic methods,of which arithmetic coding is one kind.Then it extendes the algorithm in JPEG2000 and the application modules in the digital image compression processing,and introduces the basic structure of digital image compression.At the same time the study gives a specific arithmetic coding of the encoder / decoder example to explain the encoder / decoder of the principle. 目录
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