US 12,294,694 B2
Harmonized design for intra bi-prediction and multiple reference line selection
Liang Zhao, Sunnyvale, CA (US); Xin Zhao, San Jose, CA (US); and Shan Liu, San Jose, CA (US)
Assigned to Tencent America LLC, Palo Alto, CA (US)
Filed by Tencent America LLC, Palo Alto, CA (US)
Filed on Oct. 26, 2023, as Appl. No. 18/495,378.
Application 18/495,378 is a continuation of application No. 17/570,603, filed on Jan. 7, 2022, granted, now 11,838,498.
Claims priority of provisional application 63/215,888, filed on Jun. 28, 2021.
Prior Publication US 2024/0064287 A1, Feb. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for encoding a video bitstream with intra bi-prediction and multiple reference line intra prediction, the method comprising:
receiving, by a device comprising a memory storing instructions and a processor in communication with the memory, a video bitstream for a block;
determining, by the device, whether a single directional intra prediction or an intra bi-prediction applies to the block based on mode information of the block, the mode information of the block comprising at least one of a reference line index of the block, an intra prediction mode of the block, and a size of the block;
when the single directional intra prediction applies to the block, performing, by the device, the single directional intra prediction to the block;
in response to determining that the intra bi-prediction applies to the block, performing, by the device, the intra bi-prediction to the block; and
when the intra bi-prediction applies to the block and the reference line index of the block indicating a non-adjacent reference line:
disabling a reference sample filtering process,
when a reference sample from the non-adjacent reference line being available, using the reference sample for intra bi-prediction, and
when the reference sample from the non-adjacent reference line being unavailable, using a neighboring available reference sample for intra bi-prediction.