POINT CLOUD ENCODING AND DECODING METHOD Russian patent published in 2023 - IPC G06T9/40 

FIELD: coding equipment.

SUBSTANCE: invention relates to an encoder, a decoder, computer-readable data carriers, and methods for encoding and decoding attributes of a point cloud. The encoding method comprises the steps of determining the true transform coefficient by applying RAHT to the attributes of the current node; determining a difference between attributes of the current parent node and each of the parent nodes in the first set of parent nodes that share a face or edge with the current node; selecting a second set from the first set of parent nodes according to said difference; determining a predicted value for the attributes of the current node in accordance with the attributes of the second set of parent nodes; determining a predicted transform coefficient by applying RAHT to the predicted attribute value of the current node; determining a remainder based on the true transform coefficient and the predicted transform coefficient; and encoding the remainder to obtain encoded point cloud attribute data for the bitstream.

EFFECT: increasing the efficiency of point cloud attribute compression.

26 cl, 9 dwg, 2 tbl