A comparative study of DCT and wavelet based coding

被引：3
|
作者：
Xiong, ZX
Orchard, MT
Ramchandran, K
机构：
来源：
APPLICATIONS OF DIGITAL IMAGE PROCESSING XX | 1997年 / 3164卷
关键词：
discrete cosine transform (DCT); zero tree quantization; embedded image coding; wavelets;
D O I：
10.1117/12.279559
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We study the performance difference of the discrete cosine transform (DCT) and the wavelet transform for both image and video coding, while comparing the other aspects of the coding system on an equal footing. Based on the state-of-the-art coding techniques, we point out that, for still images, the performance gap between DCT and wavelet based coding is within one dB in PSNR at the same bitrate. This is in contrast to the common perception that the wavelet transform is much superior to the DCT for image compression. For video coding, the advantage of using the wavelet transform over the DCT is even less pronounced.
引用
收藏
页码：271 / 278
页数：8
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