US 12,244,869 B2
Image reshaping in video coding using rate distortion optimization
Peng Yin, Ithaca, NY (US); Fangjun Pu, Sunnyvale, CA (US); Taoran Lu, Santa Clara, CA (US); Tao Chen, Palo Alto, CA (US); Walter J. Husak, Simi Valley, CA (US); and Sean Thomas McCarthy, San Francisco, CA (US)
Assigned to DOLBY LABORATORIES LICENSING CORPORATION, San Francisco, CA (US)
Filed by DOLBY LABORATORIES LICENSING CORPORATION, San Francisco, CA (US)
Filed on Mar. 29, 2022, as Appl. No. 17/707,581.
Application 17/707,581 is a continuation of application No. 16/968,574, granted, now 11,395,009, previously published as PCT/US2019/017891, filed on Feb. 13, 2019.
Claims priority of provisional application 62/792,122, filed on Jan. 14, 2019.
Claims priority of provisional application 62/782,659, filed on Dec. 20, 2018.
Claims priority of provisional application 62/772,228, filed on Nov. 28, 2018.
Claims priority of provisional application 62/739,402, filed on Oct. 1, 2018.
Claims priority of provisional application 62/726,608, filed on Sep. 4, 2018.
Claims priority of provisional application 62/691,366, filed on Jun. 28, 2018.
Claims priority of provisional application 62/630,385, filed on Feb. 14, 2018.
Prior Publication US 2022/0224946 A1, Jul. 14, 2022
Int. Cl. H04N 19/119 (2014.01); H04N 19/136 (2014.01); H04N 19/147 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/85 (2014.01); H04N 19/117 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/85 (2014.11) [H04N 19/119 (2014.11); H04N 19/136 (2014.11); H04N 19/147 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11); H04N 19/117 (2014.11); H04N 19/82 (2014.11)] 13 Claims
OG exemplary drawing
 
1. A method to reconstruct coded video data with one or more processors, the method comprising:
receiving a coded bitstream comprising one or more coded reshaped images in a reshaped codeword representation;
receiving reshaping parameters for the one or more coded reshaped images in the coded bitstream, wherein the reshaping parameters comprise parameters to generate a forward reshaping function based on the reshaping parameters, wherein the forward reshaping function maps pixels of an image from an input codeword representation to the reshaped codeword representation, wherein the reshaping parameters comprise:
a delta-index parameter to determine an active maximum bin index used for reshaping, wherein the active maximum bin index is smaller or equal to a predefined maximum bin index, wherein the delta-index parameter represents a difference between the active maximum bin index and the predefined maximum bin index;
a min-index parameter indicating a minimum bin index being used in the reshaping;
absolute delta codeword values for each active bin used in the reshaping; and
signs of the absolute delta codeword values for each active bin used in the reshaping.