METHOD FOR PROCESSING VIDEO INFORMATION BASED ON THREE-DIMENSIONAL DISCRETE COSINE TRANSFORMATION WITH MOTION COMPENSATION Russian patent published in 2023 - IPC H04N19/43 G06T9/00 G06T7/20 

FIELD: computer technology.

SUBSTANCE: computer technology for digital processing of video information. At the first stage, each frame, except for the first of the group containing m frames, is subjected to a cyclic shift in accordance with the calculated global motion vector of the frame. This allows the encoder to adapt to the movement of the camera or object. At the second stage, the group of cyclically shifted frames is divided into domains of size n×n× m, the three-dimensional discrete cosine transformation (DCT) is calculated, for which over each fragment of size n×n, a two-dimensional DCT is performed, then a one-dimensional DCT is performed along the time axis. In the claimed method, a composite one-dimensional DCT is used. To do this, fragments of the domain are grouped into homogeneous intervals of the total length m, over each interval, the DCT of the length of this interval is calculated. This produces adaptation to a sharp change in the content of the domain.

EFFECT: improving the efficiency of compression of moving and still images for a given recovery error by eliminating inter-frame redundancy and adapting coding to frame content.

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