Method and apparatus for encoding an intra-prediction mode using variable length codes, and recording medium for same

摘要

The disclosure relates to a method, apparatus, and recording medium for encoding an intra-prediction mode of an image using variable length codes, including: determining an intra prediction mode of a current block; determining an intra prediction mode having smallest mode number among intra prediction modes of encoded adjacent blocks as Most Probable Mode; generating and allocating variable length codes in ascending order from shorter code with higher similarity for directivity with MPM for all intra-prediction modes; and encoding intra prediction mode of current block based on allocated variable length codes, and thereby generates efficient variable length codes in consideration of high correlation in the intra-prediction modes of current block and peripheral blocks even if intra-prediction mode of current block does not match MPM derived with reference to peripheral blocks, and efficiently compressing information on intra-prediction mode of current block using variable length codes, thereby improving intra video encoding performance.

主权项

1. A method of encoding an intra prediction mode of an image by using variable length codes, the method comprising:
determining an intra prediction mode of a current block; determining an intra prediction mode having a smallest mode number among intra prediction modes of encoded adjacent blocks as an MPM (Most Probable Mode); generating and allocating variable length codes in an ascending order from a shorter code with a higher similarity for a directivity with the MPM for all intra prediction modes; and encoding the intra prediction mode of the current block based on allocated variable length codes.