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.


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    Title :

    DCT coefficient distributions


    Contributors:

    Conference:

    Human Vision and Electronic Imaging ; 1996 ; San Jose,CA,United States


    Published in:

    Publication date :

    1996-04-22





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English