US 12,335,505 B2
Determining a parametrization for context-adaptive binary arithmetic coding
Phan Hoang Tung Nguyen, Berlin (DE); Benjamin Bross, Berlin (DE); Heiko Schwarz, Berlin (DE); Detlev Marpe, Berlin (DE); and Thomas Wiegand, Berlin (DE)
Assigned to FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE)
Appl. No. 17/789,993
Filed by FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE)
PCT Filed Dec. 29, 2020, PCT No. PCT/EP2020/088001
§ 371(c)(1), (2) Date Jun. 29, 2022,
PCT Pub. No. WO2021/136789, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 19220126 (EP), filed on Dec. 30, 2019.
Prior Publication US 2023/0044030 A1, Feb. 9, 2023
Int. Cl. H04N 19/46 (2014.01); H04N 19/174 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/46 (2014.11) [H04N 19/174 (2014.11); H04N 19/176 (2014.11)] 6 Claims
OG exemplary drawing
 
1. A video decoder comprising:
a microprocessor; and
a memory, the memory having program code that, when executed by the microprocessor, causes the video decoder to:
decode, from a video bitstream, a high-level flag which, when set to a first value, indicates performing regular residual coding (RRC) for all coding units of a specific area of a current picture;
determine, from the video bitstream, for a transform block (84), whether an inverse transform corresponding to the transform block is an identity transform or not;
when it is determined that the inverse transform is the identity transform and the high-level flag is set to a second value different from the first value, determine a first Rice parameter for a binarization of a residual transform coefficient of the transform block;
when it is determined that the inverse transform is not the identity transform or the high-level flag is set to the first value, determine a second Rice parameter for the binarization of the residual transform coefficient of the transform block; and
decode the residual transform coefficient of the transform block using the first or second Rice parameter.