IMPLICITLY TRANSFORMATION SELECTION WHEN ENCODING VIDEO Russian patent published in 2023 - IPC H04N19/12 

FIELD: video encoding.

SUBSTANCE: invention concerns the ability to implicitly select a transformation when encoding video. To do this, the method includes inferring a transform type from a plurality of transform types, which includes one or more discrete cosine transforms (DCT) and one or more discrete sine transforms (DST), wherein the inference comprises: determining the size of the current transform block; determining whether or not the current video block is segmented using internal subblock segmentation (ISP); and in response to determining that the size of the current transform block is less than a threshold and that the current video block is segmented using the ISP, selecting a particular DST from the one or more DSTs as the selected transform type; transforming, using the selected transform type, the current transform block to obtain a reconstructed residual data block for the video block; and recovering the video block based on the recovered residual data for the video block.

EFFECT: ability to implicitly select a transformation when encoding video.

7 cl, 13 dwg, 1 tbl