FEATURES OF BASE COLOUR INDEX MAP MODE FOR VIDEO AND IMAGE CODING AND DECODING Russian patent published in 2018 - IPC H04N19/61 H04N19/126 H04N19/593 H04N19/70 

FIELD: electrical communication equipment.

SUBSTANCE: group of inventions relates to video encoding/decoding equipment. Encoder for encoding video or images is disclosed. Encoder is configured to encode data for the video frame block using intra video frame encoding, wherein the encoding uses a base colour table and an index map. Base colour table assigns one or more index values to one or more corresponding base colours, wherein the index map includes at least one of said one or more index values. Index map further includes one or more exception values that do not represent any of the one or more corresponding base colours in the base colour table.

EFFECT: technical result is higher efficiency of encoding/decoding images.

8 cl, 27 dwg