基于DCT和小波变换图像编码的比较研究  

The Comparative Study of Image Coding Based on DCT and Wavelet Transform

作　　者：申友志[1] 张秦艳[1] 王成优[2] 

机构地区：[1]北京邮电大学自动化学院,北京100876 [2]天津大学电子信息工程学院,天津300072

出　　处：《仪表技术》2007年第10期5-7,共3页Instrumentation Technology

摘　　要：介绍基于离散余弦变换和离散小波变换的图像和视频编码算法,对二者进行比较,得出结论。对静止图像编码,小波编码器在压缩比和编码质量方面与传统的离散余弦变换编码相比,均能取得更好的效果,峰值信噪比大约改善1dB左右;而对于视频编码来说,离散小波变换则没有取得明显的效果。The algorithms of image and video coding based on Discrete Cosine Transform （DCT） and Discrete Wavelet Transform （DWT） are briefly discussed firstly. And then the conclusions are made by the comparisons between DCT and DWT. To the still image, wavelet coding is better than DCT at compression ratio and coding quality. The peak signal to noise ratio is improved by ldB. But to video coding, DWT is not much better than DCT.

关 键 词：离散余弦变换 离散小波变换 图像编码 视频编码 峰值信噪比 

分 类 号：TM930[电气工程—电力电子与电力传动]