基于方向性的VQ分类编码算法

VQ Category Encoding Algorithm Based on Direction

该文提出了一种基于图像块方向性的分类码书的生成方法,并提出与之相适应的分类编码算法。实验结果表明:用分类码书配合分类编码算法对图像进行编码可以大幅提高图像编码速度。在PSNR仅降低1.8%的情况下,编码速度平均提高38.4%。最高可以提高45.8%。

A simple algorithm based on direction of image block to get a codebook by category is presented in this papers.By this algorithm,an correspond algorithm in encoding,encoding by category,is presented.Through experiments,it is concluded that through this encoding method with classified codebook,we can reduce time passing to 38.4% but lost only little psnr of 1.8%.At most,time passing can be reduced 45.8%.