Method for the data reduction of digital picture signals by vector quantization of coefficients obtained by orthonormal transformation by means of a symmetrical, nearly cyclical Hadamard matrix

摘要

a method for datenreduktion digital picture signals by vektorquantisierung of orthonormale transu00adformation using a symmetric fastzyklischen hadamard matrix coefficients obtained by a mittelwertkoeffizient and a variety of strukturu00adkoeffizienten a vi elzahl by using a peau00adno curve umsortierten,from the input signal gebildeu00adten blocks are formed, the coefficient of only scalar and part of both scalar and veku00adtormu00e4u00dfig quantisiert. the quantization is carried out in at least two, kaskadenartig interconnected stages on the side of coders.the reconstruction of the bildsignals on the side of a decoder is provided with an equal number of stages. this procedure allows the rauschamplitude of ru00fccku00adtransformation bildsignals gained the sichtbarkeitsu00adschwellen of the human visual system according to the ccir recommendation 500 - 1 level.