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)
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.