US 11,716,470 B2
Encoder, decoder, encoding method, and decoding method
Chong Soon Lim, Singapore (SG); Hai Wei Sun, Singapore (SG); Jing Ya Li, Singapore (SG); Han Boon Teo, Singapore (SG); Che-Wei Kuo, Singapore (SG); Chu Tong Wang, Singapore (SG); Kiyofumi Abe, Osaka (JP); Takahiro Nishi, Nara (JP); Tadamasa Toma, Osaka (JP); and Yusuke Kato, 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 Jan. 25, 2022, as Appl. No. 17/583,768.
Application 17/583,768 is a continuation of application No. PCT/JP2020/030073, filed on Aug. 5, 2020.
Claims priority of provisional application 62/883,787, filed on Aug. 7, 2019.
Prior Publication US 2022/0150484 A1, May 12, 2022
Int. Cl. H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/169 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/132 (2014.11); H04N 19/188 (2014.11); H04N 19/82 (2014.11)] 12 Claims
OG exemplary drawing
 
1. A decoder comprising:
circuitry; and
memory coupled to the circuitry,
wherein, in operation, the circuitry:
derives a parameter from information included in a header of a bitstream;
generates a second image by applying a filtering process to reconstructed samples in a first image, the filtering process including adding (i) first filtered reconstructed samples obtained by applying an adaptive loop filtering process to the reconstructed samples in the first image and (ii) second filtered reconstructed samples obtained by applying a cross component adaptive loop filtering process to the reconstructed samples in the first image;
determines whether the parameter has a predefined value; generates an inter prediction image using one of the first image and the second image, the first image being used to generate the inter prediction image when the parameter does not have the predefined value, and the second image being used to generate the inter prediction image when the parameter has the predefined value;
decodes a third image by adding a difference image and the inter prediction image; and
after decoding the third image by adding the difference image and the inter-prediction image generated by using the one of the first image and the second image, displays the second image generated by applying the filtering process to the reconstructed samples in the first image, the second image being displayed after decoding the third image regardless of whether inter-prediction image is generated using the first image or the second image.