CPC H04N 19/593 (2014.11) [H04N 19/11 (2014.11); H04N 19/136 (2014.11); H04N 19/176 (2014.11)] | 4 Claims |
1. A method for processing a video signal comprising:
receiving intra prediction mode information for a current block, wherein the intra prediction mode information indicates one of a plurality of intra prediction modes included in an intra prediction mode set, wherein the intra prediction mode set comprises a plurality of angle modes, and the plurality of angle modes comprises a basic angle mode and an extended angle mode, wherein the basic angle mode is a mode corresponding to an angle within a preset first angle range;
determining, based on at least one of a shape and a size of the current block, whether to use the extended angle mode;
when the extended angle mode is used, determining the extended angle mode based on a sum of an index of a basic angle mode determined using the intra prediction mode information and a predetermined offset, wherein the sum of the index of the basic angle mode determined using the intra prediction mode information and the predetermined offset represents the extended angle mode; and
decoding the current block based on the determined the extended angle mode,
wherein the number of extended angle modes in the intra prediction mode set is set below the number of basic angle modes.
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