METHOD OF CODING AND DECODING VIDEO INFORMATION BASED ON THREE-DIMENSIONAL DISCRETE COSINE TRANSFORMATION

摘要

FIELD: physics; image processing. ^ SUBSTANCE: invention relates to digital video information processing, and more specifically to methods of coding and decoding images, and is meant for designing systems for coding and decoding based on three-dimensional discrete cosine transformation of video data. To detect and eliminate time redundancy in each domain with size nùnùn pixels, discrete cosine transformation with respect to time is carried out. Presence of movement in each fragment with size nùn pixels is then determined from presence of non-zero spectrum factors except the first fragment of the domain. If there is movement in each fragment of the domain, in order to eliminate spatial redundancy, coefficients of discrete cosine transformation are calculated on two spatial coordinates x and y. The obtained coefficients are quantized and coded with elimination of statistical redundancy and then transmitted to a communication channel. During decoding, the entire process is carried out in reverse order. ^ EFFECT: increased efficiency of processing video information and increased compression ratio of video data using 3D discrete cosine transformation over a time interval t and formation of a buffer for storing information on domains without movement. ^ 4 dwg