US 12,015,786 B2
Integrated image reshaping and video coding
Taoran Lu, Santa Clara, CA (US); Fangjun Pu, Sunnyvale, CA (US); Peng Yin, Ithaca, NY (US); Tao Chen, Palo Alto, CA (US); and Walter J. Husak, Simi Valley, CA (US)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed on Sep. 8, 2022, as Appl. No. 17/940,819.
Application 17/940,819 is a continuation of application No. 17/240,866, filed on Apr. 26, 2021, granted, now 11,490,095.
Application 17/240,866 is a continuation of application No. 16/619,074, granted, now 10,992,941, issued on Apr. 27, 2021, previously published as PCT/US2018/040287, filed on Jun. 29, 2018.
Claims priority of provisional application 62/686,738, filed on Jun. 19, 2018.
Claims priority of provisional application 62/680,710, filed on Jun. 5, 2018.
Claims priority of provisional application 62/629,313, filed on Feb. 12, 2018.
Claims priority of provisional application 62/561,561, filed on Sep. 21, 2017.
Claims priority of provisional application 62/526,577, filed on Jun. 29, 2017.
Prior Publication US 2023/0021624 A1, Jan. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/159 (2014.01); H04N 19/124 (2014.01); H04N 19/182 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/159 (2014.11) [H04N 19/124 (2014.11); H04N 19/182 (2014.11); H04N 19/45 (2014.11)] 16 Claims
OG exemplary drawing
 
1. An apparatus for encoding images, the apparatus comprising:
an input for accessing an input image in a first codeword representation; and a processor, wherein the processor:
generates a forward reshaping function mapping pixels of the input image to a second codeword representation;
generates an inverse reshaping function based on the forward reshaping function, wherein the inverse reshaping function maps pixels from the second coding representation to the first coding representation;
generates coded pixel regions of the input image based on input pixel regions in the input image, the forward reshaping function and the inverse reshaping function;
generates reshaping metadata which characterize the forward reshaping function based on a piecewise-linear representation; and
generates an output bitstream based on the coded pixel regions of the input image and the reshaping metadata.