FIELD: data processing.
SUBSTANCE: group of inventions relates to the field of point cloud encoding/decoding into/from a bit stream of encoded point cloud data representing a physical object. In azimuth coding mode, angular interpolation is used to determine left and right angles, φleft,d and φright,d, based on offsets and legacy angles associated with the parent interval used to encode the previous bit. Present invention allows avoiding systematic performance of arctangent function for angle φleft,d and arctangent function for angle φright,d at each iteration of the azimuthal coding mode.
EFFECT: high efficiency of compression compared to a conventional azimuth coding mode while maintaining acceptable complexity.
12 cl, 14 dwg
