US 12,284,352 B2
Video encoding using context adaptive binary arithmethic coding or bypass encoding of data related to a multi-direction linear model chroma mode
Stephen Mark Keating, Basingstoke (GB); Karl James Sharman, Basingstoke (GB); and Adrian Browne, Basingstoke (GB)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/620,017
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Jun. 24, 2020, PCT No. PCT/GB2020/051531
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/260874, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 1909141 (GB), filed on Jun. 25, 2019; and application No. 1910924 (GB), filed on Jul. 31, 2019.
Prior Publication US 2022/0248024 A1, Aug. 4, 2022
Int. Cl. H04N 19/13 (2014.01); H04N 19/17 (2014.01); H04N 19/186 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/17 (2014.11); H04N 19/186 (2014.11); H04N 19/91 (2014.11)] 14 Claims
OG exemplary drawing
 
1. An image data decoding apparatus, comprising:
processing circuitry configured to decode data items representing image data by decoding systems selected from a plurality of decoding systems including a context adaptive binary arithmetic coding (CABAC) decoding system and a bypass decoding system,
wherein the data items include (i) a first data item including a first binary flag and a second binary flag indicating whether a multi-direction linear model (MDLM) chroma mode applies to a current image region, and (ii) a second data item indicating a processing direction for operation of the MDLM chroma mode; and
wherein the processing circuitry is further configured to, based on an intra-chroma prediction mode, decode instances of the first flag using the CABAC decoding system using a first CABAC context, decode instances of the second flag using the bypass decoding system, and decode instances of the second data item using the CABAC decoding system using a second CABAC context, the first CABAC context being different from the second CABAC context.