US 12,219,169 B2
Encoder, decoder, encoding method, and decoding method
Kiyofumi Abe, Osaka (JP); Takahiro Nishi, Nara (JP); and Tadamasa Toma, Osaka (JP)
Assigned to Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed on Nov. 7, 2023, as Appl. No. 18/503,941.
Application 18/503,941 is a continuation of application No. 16/830,101, filed on Mar. 25, 2020, granted, now 11,849,139.
Application 16/830,101 is a continuation of application No. PCT/JP2019/034653, filed on Sep. 3, 2019.
Claims priority of provisional application 62/729,775, filed on Sep. 11, 2018.
Claims priority of provisional application 62/727,281, filed on Sep. 5, 2018.
Prior Publication US 2024/0073441 A1, Feb. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/52 (2014.01); H04N 19/117 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/52 (2014.11) [H04N 19/117 (2014.11); H04N 19/176 (2014.11)] 3 Claims
OG exemplary drawing
 
1. An encoding method, comprising:
generating a reconstructed image based on a prediction mode selected from candidate prediction modes, the candidate prediction modes including a block prediction mode and a sub-block prediction mode; and
performing a determination process on each boundary having a pixel position of 4n, where n is an integer, wherein,
in response to the block prediction mode being selected, the determination process includes:
determining whether to apply a deblocking filter to each block boundary between a corresponding pair of adjacent blocks in the reconstructed image; and
selecting, for each block boundary, a first deblocking filter or a second deblocking filter different from the first deblocking filter; and
in response to the sub-block prediction mode being selected, the determination process includes determining whether to apply a deblocking filter to each sub-block boundary between a corresponding pair of adjacent sub-blocks among the sub-blocks in the block, wherein,
(i) each sub-block has a size of 4 by 4 pixels,
(ii) the deblocking filter is determined to be applied only to sub-block boundaries having an 8n-th pixel position, and
(iii) the deblocking filter determined to be applied is the first deblocking filter.