US 11,800,111 B2
Encoding method that encodes a first denominator for a luma weighting factor, transfer device, and decoding method
Akiyuki Tanizawa, Kanagawa (JP); and Takeshi Chujoh, Kanagawa (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Apr. 28, 2022, as Appl. No. 17/661,120.
Application 17/661,120 is a continuation of application No. 16/845,910, filed on Apr. 10, 2020, granted, now 11,363,270.
Application 16/845,910 is a continuation of application No. 16/791,917, filed on Feb. 14, 2020, granted, now 11,202,075, issued on Dec. 14, 2021.
Application 16/791,917 is a continuation of application No. 16/293,916, filed on Mar. 6, 2019, granted, now 10,609,376, issued on Mar. 31, 2020.
Application 16/293,916 is a continuation of application No. 15/438,357, filed on Feb. 21, 2017, granted, now 10,277,900, issued on Apr. 30, 2019.
Application 15/438,357 is a continuation of application No. 14/725,941, filed on May 29, 2015, granted, now 9,621,914, issued on Apr. 11, 2017.
Application 14/725,941 is a continuation of application No. 14/026,727, filed on Sep. 13, 2013, granted, now 9,462,291, issued on Oct. 4, 2016.
Application 14/026,727 is a continuation of application No. PCT/JP2012/066410, filed on Jun. 27, 2012.
Prior Publication US 2022/0256158 A1, Aug. 11, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/13 (2014.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/70 (2014.01); H04N 19/147 (2014.01); H04N 19/196 (2014.01); H04N 19/463 (2014.01); H04N 19/577 (2014.01); H04N 19/44 (2014.01); H04N 19/513 (2014.01); H04N 19/547 (2014.01); H04N 19/61 (2014.01); H04N 19/625 (2014.01); H04N 19/15 (2014.01); H04N 19/182 (2014.01); H04N 19/184 (2014.01); H04N 19/186 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/105 (2014.11); H04N 19/147 (2014.11); H04N 19/15 (2014.11); H04N 19/176 (2014.11); H04N 19/196 (2014.11); H04N 19/44 (2014.11); H04N 19/463 (2014.11); H04N 19/513 (2014.11); H04N 19/547 (2014.11); H04N 19/577 (2014.11); H04N 19/61 (2014.11); H04N 19/625 (2014.11); H04N 19/70 (2014.11); H04N 19/182 (2014.11); H04N 19/184 (2014.11); H04N 19/186 (2014.11)] 3 Claims
OG exemplary drawing
 
1. An encoding method, comprising:
encoding a first denominator for a luma weighting factor;
encoding a first difference value that is equal to a value of a difference between the first denominator and a second denominator for a chroma weighting factor;
encoding a second difference value of the luma weighting factor, wherein the second difference value is equal to a value of a difference between the luma weighting factor and a first reference value of the luma weighting factor, wherein the second difference value is in a fixed range of −128 to +127 regardless of the first denominator, wherein the first reference value is equal to a value obtained by left shift of “1” by at least one binary digit specified by the first denominator; and
encoding a third difference value of a chroma offset, wherein the third difference value is equal to a value of a difference between the chroma offset and a second reference value, the third difference value is in a fixed range of −2n to +2n−1, n being an integer value according to a bit precision of the chroma offset, and the second reference value is equal to a value obtained by subtracting a value obtained by both multiplying a median value of a maximum pixel value by the chroma weighting factor and shifting to right for the at least one binary digit specified by the second denominator, from the median value.