METHOD OF COMPRESSING AND RECONSTRUCTING MOVING COLOUR VIDEO IMAGES

摘要

FIELD: information technology. ^ SUBSTANCE: at the transmitting side, a three-dimensional array of video image transformation coefficients (TC) is calculated by performing a three-dimensional discrete cosine transform (DCT) operation. 2pk coefficients of a two-dimensional linear prediction of matrices of the three-dimensional array of video image TC are calculated and then transmitted to a digital communication channel. Based on quantised values of coefficients of the two-dimensional linear prediction, TC envelopes are formed, from which TC coordinates are determined in descending order of their absolute values. Values of frequency coefficients corresponding to the found coordinates are quantised and transmitted to a communication channel. Message reconstruction is performed in reverse order. Based on the coefficients of the two-dimensional linear prediction received from the communication channel, TC envelopes are formed, from which the accepted TC coordinates are assigned in the structure of their matrix. Video images are then reconstructed by performing inverse three-dimensional DCT over the reconstructed TC three-dimensional array. ^ EFFECT: preserving given quality of reconstructing moving colour video images under conditions with communication channel errors. ^ 10 dwg