US 12,231,638 B2
Coding unit quantization parameters in video coding
Minhua Zhou, San Diego, CA (US); Mehmet Umut Demircin, Dallas, TX (US); and Madhukar Budagavi, Plano, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Aug. 23, 2023, as Appl. No. 18/237,068.
Application 18/237,068 is a continuation of application No. 17/191,748, filed on Mar. 4, 2021, granted, now 11,743,464.
Application 17/191,748 is a continuation of application No. 16/524,614, filed on Jul. 29, 2019, granted, now 10,972,734, issued on Apr. 6, 2021.
Application 16/524,614 is a continuation of application No. 15/289,745, filed on Oct. 10, 2016, granted, now 10,368,069, issued on Jul. 30, 2019.
Application 15/289,745 is a continuation of application No. 13/093,715, filed on Apr. 25, 2011, abandoned.
Claims priority of provisional application 61/469,518, filed on Mar. 30, 2011.
Claims priority of provisional application 61/431,889, filed on Jan. 12, 2011.
Claims priority of provisional application 61/331,216, filed on May 4, 2010.
Prior Publication US 2023/0396768 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/176 (2014.01); H04N 19/117 (2014.01); H04N 19/124 (2014.01); H04N 19/13 (2014.01); H04N 19/15 (2014.01); H04N 19/159 (2014.01); H04N 19/167 (2014.01); H04N 19/172 (2014.01); H04N 19/184 (2014.01); H04N 19/196 (2014.01); H04N 19/43 (2014.01); H04N 19/463 (2014.01); H04N 19/60 (2014.01); H04N 19/61 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/117 (2014.11); H04N 19/13 (2014.11); H04N 19/15 (2014.11); H04N 19/159 (2014.11); H04N 19/167 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/184 (2014.11); H04N 19/196 (2014.11); H04N 19/43 (2014.11); H04N 19/463 (2014.11); H04N 19/60 (2014.11); H04N 19/61 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
decoding a first syntax element from a bit stream, wherein the bit stream includes a coded representation of a first picture;
determining, based on the first syntax element, a minimum coding block size for which decoding of a quantization parameter (QP) delta is enabled;
decoding a second syntax element from the bit stream;
determining, based on the second syntax element, a first QP delta value for a first region;
determining a QP value for the first region based on the first QP delta value;
performing an inverse quantization function on the first region using the QP value; and
performing an inverse transform function on the first region to form a first reconstructed block in the first picture after performing the inverse quantization function on the first region.