US 12,267,521 B2
Encoding method, decoding method, encoder, and decoder
Ryuichi Kanoh, Osaka (JP); Tadamasa Toma, Osaka (JP); Kiyofumi Abe, Osaka (JP); and Takahiro Nishi, Nara (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 Oct. 24, 2023, as Appl. No. 18/383,205.
Application 18/383,205 is a continuation of application No. 18/079,251, filed on Dec. 12, 2022, granted, now 11,831,905.
Application 18/079,251 is a continuation of application No. 17/349,459, filed on Jun. 16, 2021, granted, now 11,553,204, issued on Jan. 10, 2023.
Application 17/349,459 is a continuation of application No. 16/371,691, filed on Apr. 1, 2019, granted, now 11,070,837, issued on Jul. 20, 2021.
Claims priority of provisional application 62/651,322, filed on Apr. 2, 2018.
Prior Publication US 2024/0056598 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/52 (2014.01); H04N 19/122 (2014.01); H04N 19/124 (2014.01); H04N 19/176 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/52 (2014.11) [H04N 19/122 (2014.11); H04N 19/124 (2014.11); H04N 19/176 (2014.11); H04N 19/44 (2014.11)] 5 Claims
OG exemplary drawing
 
1. A decoder comprising:
circuitry; and
memory,
wherein, using the memory, the circuitry:
inverse quantizes quantized coefficients of a current block;
performs, depending on a size of the current block, either (i) an inverse secondary transform on a part of a result of the inverse quantization and an inverse primary transform on a result of the inverse secondary transform and another part of the result of the inverse quantization, or (ii) the inverse secondary transform on the result of the inverse quantization and the inverse primary transform on the result of the inverse secondary transform, the inverse secondary transform being performed using an inverse secondary transform basis selected from among inverse secondary transform basis candidates; and
derives an image based on a residual signal derived from a result of the inverse primary transform.