Comparative study of DCT and wavelet-based coding

Zixiang Xiong; Michael T. Orchard; Kannan Ramchandran

doi:10.1117/12.279559

30 October 1997 Comparative study of DCT and wavelet-based coding

Zixiang Xiong, Michael T. Orchard, Kannan Ramchandran

Proceedings Volume 3164, Applications of Digital Image Processing XX; (1997) https://doi.org/10.1117/12.279559
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Zixiang Xiong, Michael T. Orchard, and Kannan Ramchandran "Comparative study of DCT and wavelet-based coding", Proc. SPIE 3164, Applications of Digital Image Processing XX, (30 October 1997); https://doi.org/10.1117/12.279559

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