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US 8,344,917 B2Granted
Methods and systems for context initialization in video coding and decoding
AssigneeSharp Laboratories of America, Inc.
InventorsKiran Misra, Christopher A. Segall
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Abstract
Aspects of the present invention are related to systems and methods for context model initialization in entropy encoders and decoders.
Claims19
A method for decoding a video frame in a video sequence, said method comprising:
- in a video decoder, receiving an entropy slice;
- identifying a slice-start elementary unit in said entropy slice;
- initializing a context model associated with entropy decoding said slice-start elementary unit to a first context model;
- identifying a first row-start elementary unit in said entropy slice;
- and
- initializing a context model associated with entropy decoding said first row-start elementary unit to a second context model.
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A method for decoding a video frame in a video sequence, said method comprising:
- in a video decoder, receiving an entropy slice;
- receiving a context-table-reset flag value for a context-table-reset flag;
- identifying a first row-slice elementary unit in said entropy slice;
- and
- when said context-table-reset flag value is a first value, initializing a context model associated with entropy decoding said first row-start elementary unit to a first context model.
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A method for encoding a video frame of a video sequence, said method comprising:
- in an encoder, partitioning a frame of a video sequence into at least one reconstruction slice, thereby producing a first reconstruction slice;
- forming a first entropy slice associated with said reconstruction slice;
- identifying a first row-start elementary unit associated with said first entropy slice;
- and
- signaling, in a bitstream associated with said video frame, a first context model associated with said first row-start elementary unit.
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Dependencies are inferred from the claim text.