Algorithm computes coefficients of integer cosine transforms, containing only integer coefficients approximately proportional to floating-point coefficients of discrete cosine transforms. Used in compression of image data in blocks of N x N pixels, discrete cosine transforms involve large amounts of computation, typically amounting to 80 percent of computational load in data-compression scheme. In constructing integer approximations, competing requirements are to obtain data-compression and data-decompression performances comparable to those of corresponding descrete cosine transforms while taking advantage of simplicity afforded by integer arithmetic to reduce complexity and amount of computation.
Algorithm For Integer Cosine Transforms
NASA Tech Briefs ; 18 , 4
01.04.1994
Sonstige
Keine Angabe
Englisch
Parameterized reversible integer discrete cosine transforms [5298-02]
| British Library Conference Proceedings | 2004
New Algorithms for Short-Length Discrete Cosine Transforms
| British Library Online Contents | 1999
Chirp Hartley, Chirp cosine and Chirp sine transforms
| British Library Online Contents | 2005
Fast Algorithms of Discrete Fourier and Cosine Transforms in Mixed Formats
| British Library Conference Proceedings | 2003