US 11,910,010 B2
Intra-prediction method, and encoder and decoder using same
Joonyoung Park, Seoul (KR); Seungwook Park, Seoul (KR); Jaehyun Lim, Seoul (KR); Jungsun Kim, Seoul (KR); Younghee Choi, Seoul (KR); Byeongmoon Jeon, Seoul (KR); and Yongjoon Jeon, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Dec. 23, 2020, as Appl. No. 17/132,378.
Application 17/132,378 is a continuation of application No. 16/835,894, filed on Mar. 31, 2020, granted, now 11,006,146.
Application 16/835,894 is a continuation of application No. 14/692,134, filed on Apr. 21, 2015, granted, now 10,645,415, issued on May 5, 2020.
Application 14/692,134 is a continuation of application No. 14/113,708, granted, now 10,368,090, issued on Jul. 30, 2019, previously published as PCT/KR2012/003093, filed on Apr. 20, 2012.
Claims priority of provisional application 61/478,912, filed on Apr. 25, 2011.
Prior Publication US 2021/0112274 A1, Apr. 15, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/117 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01); H04N 19/105 (2014.01); H04N 19/11 (2014.01)
CPC H04N 19/593 (2014.11) [H04N 19/105 (2014.11); H04N 19/11 (2014.11); H04N 19/117 (2014.11); H04N 19/176 (2014.11)] 11 Claims
OG exemplary drawing
 
1. A method for decoding an image, performed by a decoding apparatus, the method comprising:
deriving an intra prediction mode for a current block based on prediction mode information obtained from a bitstream;
generating prediction samples of the current block based on the intra prediction mode; and
generating a reconstructed picture based on the prediction samples,
wherein the intra prediction mode is a horizontal prediction mode having a horizontal prediction direction,
wherein the step of generating the prediction samples includes:
deriving a prediction sample based on a first reference sample located along the horizontal prediction direction with regard to a location of the prediction sample, and
performing filtering on the prediction sample based on a second reference sample located along a vertical direction with regard to a location of the prediction sample, wherein the prediction sample is adjacent to a top boundary of the current block among the prediction samples,
wherein the first reference sample is located outside of the current block and is adjacent to a left boundary of the current block,
wherein the second reference sample is located outside of the current block and is adjacent to an upper side of the prediction sample,
wherein a filtering coefficient applied to a value of the prediction sample is larger than a filtering coefficient applied to a value of the second reference sample.