US 12,137,247 B2
Significance map encoding and decoding using partition selection
Gergely Ferenc Korodi, Waterloo (CA); Jinwen Zan, Beijing (CN); and Dake He, Waterloo (CA)
Assigned to Velos Media, LLC, Dallas, TX (US)
Filed by Velos Media, LLC, Dallas, TX (US)
Filed on Apr. 10, 2023, as Appl. No. 18/132,955.
Application 18/132,955 is a continuation of application No. 17/688,703, filed on Mar. 7, 2022, granted, now 11,627,338.
Application 17/688,703 is a continuation of application No. 17/102,218, filed on Nov. 23, 2020, granted, now 11,272,210, issued on Mar. 8, 2022.
Application 17/102,218 is a continuation of application No. 16/597,829, filed on Oct. 9, 2019, granted, now 10,848,783, issued on Nov. 24, 2020.
Application 16/597,829 is a continuation of application No. 15/712,640, filed on Sep. 22, 2017, granted, now 10,448,052, issued on Oct. 15, 2019.
Application 15/712,640 is a continuation of application No. 15/288,115, filed on Oct. 7, 2016, granted, now 9,774,885, issued on Sep. 26, 2017.
Application 15/288,115 is a continuation of application No. 14/824,197, filed on Aug. 12, 2015, granted, now 9,491,486, issued on Nov. 8, 2016.
Application 14/824,197 is a continuation of application No. 14/525,329, filed on Oct. 28, 2014, granted, now 9,143,801, issued on Sep. 22, 2015.
Application 14/525,329 is a continuation of application No. 13/279,397, filed on Oct. 24, 2011, granted, now 8,891,630, issued on Nov. 18, 2014.
Prior Publication US 2023/0308685 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 11/02 (2006.01); H04N 19/13 (2014.01); H04N 19/136 (2014.01); H04N 19/169 (2014.01); H04N 19/18 (2014.01); H04N 19/44 (2014.01); H04N 19/60 (2014.01); H04N 19/625 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/60 (2014.11) [H04N 19/13 (2014.11); H04N 19/136 (2014.11); H04N 19/18 (2014.11); H04N 19/1883 (2014.11); H04N 19/44 (2014.11); H04N 19/625 (2014.11); H04N 19/91 (2014.11)] 26 Claims
OG exemplary drawing
 
1. A method of decoding a bitstream of encoded data to reconstruct a significance map for a transform unit having a 4×4 size, the method comprising:
for each bit position in the significance map having a significant coefficient flag that is to be decoded using context-adaptive decoding:
determining a context for that bit position based on a partition set, wherein the partition set assigns one of nine different context initialization values to each bit position in the significance map such that:
a first context initialization value, a second context initialization value, a third context initialization value, and a fourth context initialization value are each assigned to one of the bit positions;
a fifth context initialization value, a sixth context initialization value, a seventh context initialization value, and an eighth context initialization value, are each assigned to two of the bit positions; and
a ninth context initialization value is assigned to three of the bit positions; and
decoding the encoded data based on the determined context for that bit position to reconstruct a bit value of the significant coefficient flag for that bit position.