Patent ID: 11942969
Assignee: INTERDIGITAL MADISON PATENT HOLDINGS, SAS
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. An apparatus, comprising:
a memory; and
a processor, configured to:
decode a plurality of transform coefficients for at least a portion of a picture, the transform coefficients obtained using a plurality of transform sizes, wherein the video decoder comprises:
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 different transform coefficient positions;
parse a bitstream for 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.