DCT coefficient distributions

Stephen R. Smoot; Lawrence A. Rowe

doi:10.1117/12.238737

22 April 1996 DCT coefficient distributions

Stephen R. Smoot, Lawrence A. Rowe

Proceedings Volume 2657, Human Vision and Electronic Imaging; (1996) https://doi.org/10.1117/12.238737
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

Many image and video compression schemes perform the discrete cosine transform (DCT) to represent image data in frequency space. An analysis of a broad suite of images confirms previous findings that a Laplacian distribution can be used to model the luminance ac coefficients. This model is expanded and applied to color space (Cr/Cb) coefficients. In MPEG, the DCT is used to code interframe prediction error terms. The distribution of these coefficients is explored. Finally, the distribution model is applied to improve dynamic generation of quantization matrices.

Citation Download Citation

Stephen R. Smoot and Lawrence A. Rowe "DCT coefficient distributions", Proc. SPIE 2657, Human Vision and Electronic Imaging, (22 April 1996); https://doi.org/10.1117/12.238737

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