US 12,149,693 B2
Binarization of dQP using Separate Absolute Value and Sign (SAVS) in CABAC
Jun Xu, San Jose, CA (US)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Filed by SONY GROUP CORPORATION, Tokyo (JP)
Filed on Apr. 25, 2023, as Appl. No. 18/138,863.
Application 18/138,863 is a continuation of application No. 17/567,335, filed on Jan. 3, 2022, granted, now 11,665,348.
Application 17/567,335 is a continuation of application No. 16/985,881, filed on Aug. 5, 2020, granted, now 11,245,902, issued on Jan. 19, 2022.
Application 16/985,881 is a continuation of application No. 15/909,030, filed on Mar. 1, 2018, granted, now 10,791,328, issued on Sep. 29, 2020.
Application 15/909,030 is a continuation of application No. 14/795,102, filed on Jul. 9, 2015, abandoned.
Application 14/795,102 is a continuation of application No. 13/345,320, filed on Jan. 6, 2012, granted, now 9,112,526, issued on Aug. 18, 2015.
Claims priority of provisional application 61/503,430, filed on Jun. 30, 2011.
Claims priority of provisional application 61/497,281, filed on Jun. 15, 2011.
Prior Publication US 2023/0262219 A1, Aug. 17, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/00 (2014.01); H03M 7/30 (2006.01); H03M 7/40 (2006.01); H04N 19/124 (2014.01); H04N 19/176 (2014.01); H04N 19/184 (2014.01); H04N 19/50 (2014.01); H04N 19/61 (2014.01); H04N 19/70 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/124 (2014.11) [H03M 7/3071 (2013.01); H03M 7/4018 (2013.01); H03M 7/6088 (2013.01); H04N 19/176 (2014.11); H04N 19/184 (2014.11); H04N 19/50 (2014.11); H04N 19/61 (2014.11); H04N 19/70 (2014.11); H04N 19/91 (2014.11)] 5 Claims
OG exemplary drawing
 
1. A video encoding apparatus, comprising:
circuitry configured to:
set a difference quantization parameter as a difference between a quantization parameter of a current coding unit and a predicted quantization parameter of the current coding unit;
separate the difference quantization parameter into an absolute value of the difference quantization parameter and a sign indicating whether the difference quantization parameter is positive or negative;
sequentially encode the absolute value and the sign, wherein
the absolute value of the difference quantization parameter is mapped to a binary string using unary codes; and
generate bitstream as syntax in which the absolute value and the sign are written in order, wherein
an order of coding is, first, the binary string of the absolute value and, then, the sign.