| CPC H04N 19/105 (2014.11) [H04N 19/11 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] | 17 Claims |
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1. A method for video decoding, applicable to a decoding device, the method comprising:
decoding a coded block of a video image frame to determine a target intra prediction mode corresponding to the coded block;
tracking a predefined subset of intra prediction modes among available intra prediction modes rather than all of the available intra prediction modes, a number of the predefined subset of intra prediction modes being less than a total number of the available intra prediction modes;
maintaining a most probable intra prediction mode list;
determining whether simplified frequency-based intra mode coding needs to be used for a corresponding coded block according to at least one of a value of an index identifier comprised in a sequence header corresponding to a video image frame sequence, or a value of an index identifier comprised in an image header corresponding to the video image frame;
in response to determining that the simplified frequency-based intra mode coding needs to be used, determining whether the target intra prediction mode belongs to the predefined subset of intra prediction modes;
in response to the target intra prediction mode belonging to the predefined subset of intra prediction modes, updating statistical values of the predefined subset of intra prediction modes;
updating the most probable intra prediction mode list according to the updated statistical values of the predefined subset of intra prediction modes; and
decoding another coded block of the video image frame based on the updated most probable intra prediction mode list.
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