Context reduction for context adaptive binary arithmetic coding

A reduction in the number of binarizations and/or contexts used in context adaptive binary arithmetic coding (CABAC) for video coding is proposed. In particular, this disclosure proposes techniques that may lower the number contexts used in CABAC by up to 56.

ELECTRIC COMMUNICATION TECHNIQUE

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using adaptive coding-characterised by the element, parameter or criterion affecting or controlling the adaptive coding-Incoming video signal characteristics or properties

PICTORIAL COMMUNICATION, e.g. TELEVISION

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using adaptive coding-characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding-the unit being an image region, e.g. an object-the region being a slice, e.g. a line of blocks or a group of blocks

ELECTRONIC CIRCUITRY

Conversion of a code where information is represented by a given sequence or number of digits to a code where the same ; , similar or subset of;  information is represented by a different sequence or number of digits-Compression ; Expansion; Suppression of unnecessary data, e.g. redundancy reduction-Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code-Conversion to or from arithmetic code-Binary arithmetic codes-Context adapative binary arithmetic codes [CABAC]

CODING; DECODING; CODE CONVERSION IN GENERAL 

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using adaptive coding-characterised by the element, parameter or selection affected or controlled by the adaptive coding-Selection of coding mode or of prediction mode

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals-Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using adaptive coding-characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding-the unit being an image region, e.g. an object-the region being a block, e.g. a macroblock

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using predictive coding 

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using transform coding

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals-using adaptive coding-characterised by the element, parameter or selection affected or controlled by the adaptive coding-Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]

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