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Jacques Guichard, Eric Cassimatis: Circuit for the fast calculation of the direct or inverse cosine transform of a discrete signal. Nutter McClennen & Fish, June 20, 1989: US04841464 (24 worldwide citation)

A circuit for the fast calculation of the discrete cosine transform (X.sub.i), 0.ltoreq.i.ltoreq.N-1, in which N=2.sup.n and n is an integer of a signal defined by a sequence (x.sub.i), 0.ltoreq.i.ltoreq.N-1 includes a first adder stage receiving the sequence (x.sub.i), 0.ltoreq.i.ltoreq.N-1, and su ...


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Guichard Jacques, Cassimatis Eric: Circuit de calcul rapide de la transformee consinus directe ou inverse dun signal discret, Circuit for the fast calculation of the direct or inverse cosine transform of a discrete signal. Guichard Jacques, Cassimatis Eric, GOUDREAU GAGE DUBUC, April 4, 1989: CA1252212

-33- ABSTRACT OF THE DISCLOSURE Circuit for the fast calculation of the discrete cosinetransform (Xi), 0?i?N-1, in which N=2 and n is aninteger of a signal defined by a sequence (xi),0?i?N-1. This circuit comprises a first adder stage receiving thesequence (xi), 0?i?N-1, and supplying two sequences ...