Methods and apparatus for unified significance map coding
Xiaoan Lu, Yardley, PA (US); Joel Sole, San Diego, CA (US); Peng Yin, Ithaca, NY (US); Qian Xu, Folsom, CA (US); and Yunfei Zheng, San Jose, CA (US)
Assigned to INTERDIGITAL MADISON PATENT HOLDINGS, SAS, Paris (FR)
Filed by INTERDIGITAL MADISON PATENT HOLDINGS, SAS, Paris (FR)
Filed on Apr. 25, 2023, as Appl. No. 18/138,947.
Application 18/138,947 is a continuation of application No. 17/692,563, filed on Mar. 11, 2022, granted, now 11,671,112.
Application 17/692,563 is a continuation of application No. 17/154,283, filed on Jan. 21, 2021, granted, now 11,309,910, issued on Apr. 19, 2022.
Application 17/154,283 is a continuation of application No. 16/374,815, filed on Apr. 4, 2019, granted, now 11,177,826, issued on Nov. 16, 2021.
Application 16/374,815 is a continuation of application No. 15/709,965, filed on Sep. 20, 2017, granted, now 10,305,510, issued on May 28, 2019.
Application 15/709,965 is a continuation of application No. 13/696,852, granted, now 9,793,921, issued on Oct. 17, 2017, previously published as PCT/US2011/000831, filed on May 11, 2011.
Claims priority of provisional application 61/333,808, filed on May 12, 2010.
Prior Publication US 2023/0261672 A1, Aug. 17, 2023
1. An apparatus, comprising: a memory; and a processor, configured to: encode transform coefficients for at least a portion of a picture, the transform coefficients obtained using a plurality of transform sizes, determine a rule for creating a context sharing map wherein the context sharing map is defined as a map indicative of a probability model for one or more bins of a binary sequence created by uniquely mapping a given non-binary syntax element shared among a plurality of different transform coefficient positions; provide bitstream syntax indicative of said determined rule; create a context sharing map for the transformed portion of the picture based on said determined rule, wherein one or more context sharing maps are generated for the transform coefficients based on the determined rule used for transformed portion of the picture, the one or more context sharing maps for providing at least one context that is shared among at least some of the transform coefficients obtained from at least two different ones of the plurality of transform sizes.
