Arithmetic decoding apparatus and method

Details Arithmetic decoding apparatus and method Arithmetic decoding apparatus and method

2007-12-04

2007-12-04

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from code based on probability

C341S051000, C382S247000

Reexamination Certificate

active

11337615

ABSTRACT:
An arithmetic decoding method and apparatus are provided. The apparatus includes an arithmetic decoding apparatus comprising an arithmetic decoding unit determining a range of a most probable symbol and a range of a least probable symbol required to decode a current symbol, comparing a current offset and the range of the most probable symbol required to decode the current symbol, and determining and outputting the value of the current symbol. The apparatus also includes a predicted arithmetic decoding unit determining a range of a most probable symbol and a range of a least probable symbol which are required to decode a next symbol using a prediction that the current symbol is the most probable symbol, comparing a next offset and the range of the most probable symbol required to decode the next symbol, and determining and outputting a range of the next symbol.

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Dyer et al., Improved Throughput Arithmetic Coder for JPEG2000, IEEE, Oct. 2004, International Conference on Image Processing, vol. 4 pp. 2817-2820, Oct. 2004.

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