Method and system for decoder-side intra mode derivation for block-based video coding

Abstract

Systems and methods are disclosed for encoding and for decoding of video data, including predicting a video block of the video data using decoder-side intra mode derivation (DIMD). The disclosed predicting techniques include selecting candidate intra prediction modes based on intra prediction modes used by neighboring video blocks. Techniques disclosed further include determining respective costs of using the selected candidate intra prediction modes to predict samples in a template region adjacent to the video block, deriving an intra prediction mode from the selected candidate intra prediction modes having the lowest cost, and predicting samples in the video block using the derived intra prediction mode.