US 12,309,376 B2
Method and device for encoding intra prediction mode for image prediction unit, and method and device for decoding intra prediction mode for image prediction unit
Vadim Seregin, Suwon-si (KR); Jianle Chen, Suwon-si (KR); Sun-il Lee, Yongin-si (KR); and Tammy Lee, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Oct. 27, 2022, as Appl. No. 17/975,133.
Application 17/975,133 is a continuation of application No. 17/314,475, filed on May 7, 2021, granted, now 11,509,899.
Application 17/314,475 is a continuation of application No. 16/820,191, filed on Mar. 16, 2020, granted, now 11,070,811, issued on Apr. 21, 2020.
Application 16/820,191 is a continuation of application No. 16/003,946, filed on Jun. 8, 2018, granted, now 10,630,986, issued on Apr. 21, 2020.
Application 16/003,946 is a continuation of application No. 13/997,524, granted, now 10,021,384, issued on Jul. 10, 2018, previously published as PCT/KR2011/010066, filed on Dec. 23, 2011.
Claims priority of provisional application 61/426,684, filed on Dec. 23, 2010.
Prior Publication US 2023/0064033 A1, Mar. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/13 (2014.01); H04N 19/186 (2014.01); H04N 19/46 (2014.01); H04N 19/463 (2014.01); H04N 19/593 (2014.01); H04N 19/11 (2014.01); H04N 19/119 (2014.01); H04N 19/154 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/186 (2014.11); H04N 19/46 (2014.11); H04N 19/463 (2014.11); H04N 19/593 (2014.11); H04N 19/11 (2014.11); H04N 19/119 (2014.11); H04N 19/154 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A method of decoding an image, the method comprising:
splitting the image into a plurality of maximum coding units by using maximum size information of a coding unit;
hierarchically splitting a maximum coding unit from among the plurality of maximum coding units into at least one coding unit including a current coding unit based on split information;
obtaining, from a bitstream, first intra prediction mode information regarding a prediction unit of a first image component;
obtaining, from the bitstream, second intra prediction mode information regarding a prediction unit of a second image component;
when a first intra prediction mode regarding the prediction unit of the first image component indicated by the first intra prediction mode information regarding the prediction unit of the first image component is one of a planar mode, a DC mode, a horizontal mode and a vertical mode,
determining, based on the obtained second intra prediction mode information regarding the prediction unit of the second image component, a second intra prediction mode regarding the prediction unit of the second image component from among a plurality of intra prediction modes which are included in an intra prediction mode candidate group regarding the second image component, wherein the intra prediction mode candidate group regarding the second image component includes a diagonal mode;
performing intra prediction on the prediction unit of the first image component according to the first intra prediction mode regarding the prediction unit of the first image component indicated by the first intra prediction mode information regarding the prediction unit of the first image component; and
performing intra prediction on the prediction unit of the second image component according to the determined second intra prediction mode regarding the prediction unit of the second image component,
wherein the performing intra prediction on the prediction unit of the first image component comprises, when the first intra prediction mode indicated by the first intra prediction mode information regarding the prediction unit of the first image component is the planar mode, obtaining a prediction value of a current pixel included in a block corresponding to the prediction unit of the first image component using four neighboring pixels of the block corresponding to the prediction unit of the first image component,
wherein the four neighboring pixels are located on a left side of the block corresponding to the prediction unit of the first image component and an upper side of the block corresponding to the prediction unit of the first image component,
wherein the current coding unit is a coding unit which is not split into coding units,
wherein the prediction unit of the first image component is determined by splitting the current coding unit based on partition type information, and
wherein the partition type information indicates a partition type of symmetrically splitting the current coding unit along a height and a width of the current coding unit.