US 10,893,277 B2
Method and device for intra prediction video
Tammy Lee, Seoul (KR); and Jianle Chen, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-do (KR)
Filed on Nov. 11, 2019, as Appl. No. 16/680,133.
Application 16/680,133 is a continuation of application No. 16/366,184, filed on Mar. 27, 2019, granted, now 10,506,239.
Application 16/366,184 is a continuation of application No. 15/851,228, filed on Dec. 21, 2017, granted, now 10,291,919, issued on May 14, 2019.
Application 15/851,228 is a continuation of application No. 15/352,103, filed on Nov. 15, 2016, granted, now 9,883,191, issued on Jan. 30, 2018.
Application 15/352,103 is a continuation of application No. 14/354,722, granted, now 9,621,918, issued on Apr. 11, 2017, previously published as PCT/KR2012/008938, filed on Oct. 29, 2012.
Claims priority of provisional application 61/552,692, filed on Oct. 28, 2011.
Prior Publication US 2020/0084456 A1, Mar. 12, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/159 (2014.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/11 (2014.01); H04N 19/136 (2014.01); H04N 19/182 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/159 (2014.11) [H04N 19/105 (2014.11); H04N 19/11 (2014.11); H04N 19/136 (2014.11); H04N 19/176 (2014.11); H04N 19/182 (2014.11); H04N 19/593 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A method for decoding a video, the method comprising:
determining availability of pixel values on a predetermined number of adjacent pixel positions used for intra prediction of a current block from among blocks obtained by splitting a picture forming the video according to a hierarchical structure;
when a pixel value on a first adjacent pixel position among the predetermined number of adjacent pixel positions is unavailable, searching for an available pixel value on a second adjacent pixel position by searching pixel values on the predetermined number of adjacent pixel positions in a predetermined direction based on the first adjacent pixel positions;
replacing an unavailable pixel value on the first adjacent pixel position with an available pixel value on the second adjacent pixel position, to generate a new pixel value on the first adjacent pixel position; and
performing intra prediction on the current block by using pixel values on the predetermined number of adjacent pixel positions comprising the new pixel value on the first adjacent pixel position,
wherein the first adjacent pixel position is a lowermost left adjacent pixel position from among left and lower left adjacent pixel positions of the current block,
wherein the searching for the second adjacent pixel values further comprises searching for the second adjacent pixel position by searching left and lower left adjacent pixel positions of the current block from bottom to top based on the first adjacent pixel position, and when the available pixel value on the second adjacent pixel position is not found among the left and lower left adjacent pixel positions of the current block, searching top and upper right adjacent pixel positions of the current block from left to right,
wherein, when all the predetermined number of adjacent pixels are unavailable, all the predetermined number of adjacent pixels are replaced into a predetermined value determined based on a bit-depth.