US 12,231,639 B2
Image encoding and decoding apparatus, and image encoding and decoding method using contour mode based intra prediction
Jong Ki Han, Seoul (KR); Chan Won Seo, Incheon (KR); and Kwang Hyun Choi, Seoul (KR)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed on Nov. 21, 2023, as Appl. No. 18/516,398.
Application 18/516,398 is a continuation of application No. 17/850,006, filed on Jun. 27, 2022, granted, now 11,863,750.
Application 17/850,006 is a continuation of application No. 15/262,530, filed on Sep. 12, 2016, granted, now 11,418,786, issued on Aug. 16, 2022.
Application 15/262,530 is a continuation of application No. 14/381,378, abandoned, previously published as PCT/KR2013/001551, filed on Feb. 27, 2013.
Claims priority of application No. 10-2012-0019663 (KR), filed on Feb. 27, 2012; and application No. 10-2012-0106279 (KR), filed on Sep. 25, 2012.
Prior Publication US 2024/0089438 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/124 (2014.01); H04L 45/745 (2022.01); H04N 19/11 (2014.01); H04N 19/117 (2014.01); H04N 19/12 (2014.01); H04N 19/136 (2014.01); H04N 19/14 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/61 (2014.01); H04N 19/109 (2014.01); H04N 19/132 (2014.01); H04N 19/17 (2014.01); H04N 19/597 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/124 (2014.11) [H04L 45/745 (2013.01); H04N 19/11 (2014.11); H04N 19/117 (2014.11); H04N 19/12 (2014.11); H04N 19/136 (2014.11); H04N 19/14 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/61 (2014.11); H04N 19/109 (2014.11); H04N 19/132 (2014.11); H04N 19/17 (2014.11); H04N 19/597 (2014.11); H04N 19/82 (2014.11)] 6 Claims
OG exemplary drawing
 
1. A video decoding method performed by a video decoding apparatus, the method comprising:
determining that intra skip coding is not applied to a current block;
obtaining, at least partly based on the determination that the intra skip coding is not applied to the current block, information from a bitstream specifying that a contour mode based intra prediction is applied to the current block;
deriving, at least partly in response to the information from the bitstream, a first depth value relating to the current block by performing the contour mode based intra prediction for the current block;
deriving, based on the first depth value, a first index value using a first look up table specifying an index value corresponding to a depth value;
deriving a second index value using the first index value and a residual index value, wherein the residual index value specifies a difference between the first index value and the second index value; and
obtaining a second depth value relating to the current block based on the second index value and a second look up table specifying a depth value corresponding to an index value;
generating a prediction block for the current block based on the second depth value; and
reconstructing the current block based on the prediction block that is generated by the contour mode based intra prediction,
wherein whether to apply intra skip coding to the current block is determined based on a type of an image including a current block.