US 9,813,701 B2
Devices and methods for context reduction in last significant coefficient position coding
Krit Panusopone, San Diego, CA (US); Xue Fang, San Diego, CA (US); and Limin Wang, San Diego, CA (US)
Assigned to GOOGLE TECHNOLOGY HOLDINGS LLC, Mountain View, CA (US)
Filed by Google Technology Holdings LLC, Mountain View, CA (US)
Filed on Jan. 18, 2013, as Appl. No. 13/745,660.
Claims priority of provisional application 61/589,216, filed on Jan. 20, 2012.
Claims priority of provisional application 61/594,337, filed on Feb. 2, 2012.
Prior Publication US 2013/0188688 A1, Jul. 25, 2013
Int. Cl. H04N 19/91 (2014.01); H04N 19/13 (2014.01); H04N 19/463 (2014.01); H04N 19/196 (2014.01); H04N 19/184 (2014.01)
CPC H04N 19/00121 (2013.01) [H04N 19/13 (2014.11); H04N 19/198 (2014.11); H04N 19/463 (2014.11); H04N 19/91 (2014.11); H04N 19/184 (2014.11)] 16 Claims
OG exemplary drawing
 
1. A method of video coding, the method comprising:
generating a context model comprising at least a first context, a second context, and a third context, wherein the context model comprises:
the first context assigned to a first significant bin for a 4×4 block, a first and second significant bins for an 8×8 block, and a first, second, third and fourth most significant bins for a 16×16 block,
the second context assigned to a second significant bin for the 4×4 block, a third and fourth significant bins for the 8×8 block, and a fifth, sixth and seventh significant bins for the 16×16 block, and
the third context assigned to a third significant bin for the 4×4 block and a fifth significant bin for the 8×8 block;
entropy coding, using the context model, a position of a last non-zero coefficient of a first video block having a size corresponding to one of the 4×4 block, the 8×8 block, or the 16×16 block; and
entropy coding transform coefficients of the video block.