INTRA PREDICTION MODE ENCODING/DECODING METHOD AND APPARATUS FOR SAME

摘要

An intra prediction method according to the present invention comprises the following steps: deriving neighboring prediction mode information from a left neighboring prediction mode and a top neighboring prediction mode; deriving an intra prediction mode for a target unit to be decoded, using the derived neighboring prediction mode information; and performing intra prediction for the target unit to be decoded, based on the intra prediction mode. According to the present invention, video encoding/decoding efficiency may be improved.

主权项

1. A video decoding apparatus comprising:
a prediction module to
receive and decode a most probable mode (MPM) flag and an MPM index for a target decoding unit;derive neighbor prediction mode information from a left neighbor prediction mode and an upper neighbor prediction mode;determine MPM candidates for the target decoding unit using the neighbor prediction mode information;generate an MPM list using the determined MPM candidates;derive an intra prediction mode of the target decoding unit using the decoded MPM index and the generated MPM list; andperform intra prediction on the target decoding unit based on the derived intra prediction mode, wherein the left neighbor prediction mode is an intra prediction mode of a left neighbor unit adjacent to a left side of the target decoding unit and the upper neighbor prediction mode is an intra prediction mode of an upper neighbor unit adjacent to an upper side of the target decoding unit, and the MPM index is an index indicating the same candidate as the intra prediction mode of the target decoding unit, among the MPM candidates included in the MPM list, wherein the neighbor prediction mode information includes a mode number of the left neighbor prediction mode and a mode number of the upper neighbor prediction mode, wherein the prediction module determines the left neighbor prediction mode and the upper neighbor prediction mode as the MPM candidates, and the MPM list comprises three MPM candidates, and wherein the prediction module determines a predetermined intra prediction mode as an additional MPM candidate when the left neighbor prediction mode is the same as the upper neighbor prediction mode.