US 11,902,592 B2
Method and device for entropy encoding, decoding video signal
Moonmo Koo, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Dec. 16, 2021, as Appl. No. 17/553,354.
Application 17/553,354 is a continuation of application No. 16/605,101, granted, now 11,240,536, previously published as PCT/KR2018/004143, filed on Apr. 9, 2018.
Claims priority of provisional application 62/484,899, filed on Apr. 13, 2017.
Prior Publication US 2022/0109892 A1, Apr. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/91 (2014.01); H04N 19/129 (2014.01); H04N 19/13 (2014.01); H04N 19/18 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/91 (2014.11) [H04N 19/129 (2014.11); H04N 19/13 (2014.11); H04N 19/18 (2014.11); H04N 19/70 (2014.11)] 7 Claims
OG exemplary drawing
 
1. A method for decoding a video signal, comprising:
checking whether a coding block is divided into plural transform blocks;
based on that the coding block is divided into the plural transform blocks, determining a limited region within a current transform block among the plural transform blocks based on a width and a height of the current transform block, wherein a last non-zero transform coefficient is positioned in the limited region within the current transform block;
obtaining first information on a position of the last non-zero transform coefficient within the limited region, wherein the first information on a position of the last non-zero transform coefficient includes prefix information of a horizontal position and prefix information of a vertical position for the last non-zero transform coefficient, and suffix information of a horizontal position and suffix information of a vertical position for the last non-zero transform coefficient; and
decoding the current transform block based on the position of the last non-zero transform coefficient,
wherein the prefix information of the horizontal position and the prefix information of the vertical position for the last non-zero transform coefficient are inversely binarized based on a truncated unary code, and
wherein the suffix information of the horizontal position and the suffix information of the vertical position for the last non-zero transform coefficient are inversely binarized based on a fixed length code.