US 11,659,169 B2
Affine Linear Weighted Intra Predictions
Jonathan Pfaff, Berlin (DE); Heiko Schwarz, Berlin (DE); Philipp Helle, Berlin (DE); Michael Schäfer, Berlin (DE); Roman Rischke, Berlin (DE); Tobias Hinz, Berlin (DE); Philipp Merkle, Berlin (DE); Björn Stallenberger, Berlin (DE); Martin Winken, Berlin (DE); Mischa Siekmann, Berlin (DE); Detlev Marpe, Berlin (DE); and Thomas Wiegand, Berlin (DE)
Assigned to Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Munich (DE)
Filed on Mar. 11, 2021, as Appl. No. 17/198,750.
Application 17/198,750 is a continuation of application No. PCT/EP2019/074504, filed on Sep. 13, 2019.
Claims priority of application No. 18194357 (EP), filed on Sep. 13, 2018.
Prior Publication US 2021/0218960 A1, Jul. 15, 2021
Int. Cl. H04N 19/176 (2014.01); H04N 19/593 (2014.01); H04N 19/11 (2014.01); H04N 19/48 (2014.01)
CPC H04N 19/11 (2014.11) [H04N 19/176 (2014.11); H04N 19/48 (2014.11); H04N 19/593 (2014.11)] 33 Claims
OG exemplary drawing
 
1. An apparatus comprising a decoder for decoding a picture from a data stream supporting a first set of intra-prediction modes including a plurality of directional prediction modes and at least one of a DC mode and a planar mode, and a second set of intra-prediction modes, wherein the decoder is configured to:
decode a predetermined block of the picture by:
assigning, based on a first signal in the data stream, the predetermined block to the first set of intra-prediction modes or the second set of intra-prediction modes,
sorting the assigned set of intra-prediction modes according to intra-prediction modes used for neighboring blocks, neighboring the predetermined block, to acquire a list of intra-prediction modes,
deriving, for the predetermined block, from the data stream, an index to an intra-prediction mode in the list of intra-prediction modes,
predicting the predetermined block using the intra-prediction mode to which the index points,
wherein decoder is configured to,
if the predetermined block is assigned to the first set of intra-prediction modes, sorting the assigned set using a second mapping that maps each intra-prediction mode of the second set of prediction modes onto a representative intra-prediction mode in the first set of intra-prediction modes, wherein the second mapping maps a plurality of modes of the second set of intra-prediction modes to a single intra-prediction mode of the first set of intra-prediction modes.