US 12,219,145 B2
Image processing method, and device for same
Hyeongmoon Jang, Seoul (KR); Junghak Nam, Seoul (KR); Seunghwan Kim, Seoul (KR); and Jaehyun Lim, Seoul (KR)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Dec. 15, 2023, as Appl. No. 18/542,173.
Application 18/542,173 is a continuation of application No. 17/851,953, filed on Jun. 28, 2022, granted, now 11,882,286.
Application 17/851,953 is a continuation of application No. 16/476,033, granted, now 11,394,974, previously published as PCT/KR2017/015590, filed on Dec. 27, 2017.
Claims priority of provisional application 62/446,535, filed on Jan. 16, 2017.
Claims priority of provisional application 62/441,588, filed on Jan. 3, 2017.
Prior Publication US 2024/0121393 A1, Apr. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/00 (2014.01); H04N 19/119 (2014.01); H04N 19/124 (2014.01); H04N 19/13 (2014.01); H04N 19/176 (2014.01); H04N 19/61 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/119 (2014.11); H04N 19/124 (2014.11); H04N 19/176 (2014.11); H04N 19/61 (2014.11)] 10 Claims
OG exemplary drawing
 
1. An apparatus for decoding a video signal, comprising:
a memory configured to store the video signal; and
a processor coupled with the memory,
wherein the processor is configured to:
parse a transform skip flag specifying whether a transform is applied to the current block based on a size of the current block being smaller than a predetermined first size;
obtain an index specifying one of a plurality of transform kernel combinations to be applied to the current block based on the transform skip flag, each transform kernel combination being composed of a transform kernel in a horizontal direction and a transform kernel in a vertical direction; and
generate an inverse transformed transform block of the current block by performing an inverse transform to a residual block based on the transform kernel combination specified by the index,
wherein for obtaining the index, the processor is further configured to:
check a value of an index flag related to parsing the index, based on the transform skip flag being 0; and
derive the index specifying the transform kernel combination as DCT-2 for the transform kernels in the horizontal and vertical directions based on the value of the index flag being 0.