US 11,949,870 B2
Context modeling for low-frequency non-separable transformation signaling for video coding
Alican Nalci, San Diego, CA (US); Hilmi Enes Egilmez, San Diego, CA (US); Vadim Seregin, San Diego, CA (US); Muhammed Zeyd Coban, Carlsbad, CA (US); and Marta Karczewicz, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 18, 2020, as Appl. No. 16/905,663.
Claims priority of provisional application 62/864,939, filed on Jun. 21, 2019.
Prior Publication US 2020/0404276 A1, Dec. 24, 2020
Int. Cl. H04N 19/13 (2014.01); H04N 19/176 (2014.01); H04N 19/61 (2014.01); H04N 19/70 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/176 (2014.11); H04N 19/61 (2014.11); H04N 19/70 (2014.11); H04N 19/91 (2014.11)] 25 Claims
OG exemplary drawing
 
18. A device for coding video data, the device comprising:
a memory; and
one or more processors implemented in circuitry and configured to:
determine a color component of a unit of video data;
obtain, for the unit of video data, a value of a multiple transform selection (MTS) index;
determine, based at least on the color component and the value of the MTS index, a value of a context increment (ctxInc) for context-adaptive binary arithmetic coding (CABAC) a syntax element that specifies a value of a low-frequency non-separable transform (LFNST) index for the unit of video data;
CABAC code, based on the determined context and via a syntax structure for the unit of video data, the syntax element that specifies the value of the LFNST index for the unit of video data; and
transform, based on a transform indicated by the value of the LFNST index, transform coefficients of the unit of video data.