US 12,323,618 B2
Method and apparatus for processing image signal
Moonmo Koo, Seoul (KR); Mehdi Salehifar, Seoul (KR); Seunghwan Kim, Seoul (KR); and Jaehyun Lim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Nov. 27, 2023, as Appl. No. 18/520,383.
Application 18/520,383 is a continuation of application No. 18/113,936, filed on Feb. 24, 2023, granted, now 11,882,310.
Application 18/113,936 is a continuation of application No. 17/473,078, filed on Sep. 13, 2021, granted, now 11,632,570, issued on Apr. 18, 2023.
Application 17/473,078 is a continuation of application No. 16/899,910, filed on Jun. 12, 2020, granted, now 11,146,816, issued on Oct. 12, 2021.
Application 16/899,910 is a continuation of application No. PCT/KR2019/011248, filed on Sep. 2, 2019.
Claims priority of provisional application 62/727,548, filed on Sep. 5, 2018.
Claims priority of provisional application 62/726,301, filed on Sep. 2, 2018.
Prior Publication US 2024/0114166 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/593 (2014.01); H04N 19/122 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/593 (2014.11) [H04N 19/122 (2014.11); H04N 19/176 (2014.11)] 11 Claims
OG exemplary drawing
 
1. An image decoding apparatus, comprising:
a memory: and
at least one processor connected to the memory, the at least one processor configured to:
determine whether a non-separable transform is applied for a current block, based on a non-separable transform index obtained from a bitstream;
based on the non-separable transform being determined to be applied for the current block, determine a non-separable transform set index indicating a non-separable transform set for the current block from among four predetermined non-separable transform sets based on an intra prediction mode of the current block:
determine a transform kernel included in the non-separable transform set indicated by the non-separable transform set index as a non-separable transform matrix for the current block; and
perform secondary inverse transform for the current block based on the non-separable transform matrix,
wherein the non-separable transform matrix is applied for R coefficients included in the current block having a square shape to generate N transformed coefficients, R being smaller than N, N being equal to a total number of coefficients for which the non-separable transform matrix is applied in the current block.