Arithmetic decoding apparatus and method
First Claim
1. An arithmetic decoding apparatus comprising:
- an arithmetic decoding unit which determines 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 determines and outputs a value of the current symbol; and
a predicted arithmetic decoding unit which determines a range of a most probable symbol and a range of a least probable symbol required to decode a next symbol using a prediction that the current symbol is the most probable symbol, compares a next offset and the range of the most probable symbol required to decode the next symbol, and determines and outputs a value of the next symbol.
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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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Citations
16 Claims
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1. An arithmetic decoding apparatus comprising:
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an arithmetic decoding unit which determines 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 determines and outputs a value of the current symbol; and a predicted arithmetic decoding unit which determines a range of a most probable symbol and a range of a least probable symbol required to decode a next symbol using a prediction that the current symbol is the most probable symbol, compares a next offset and the range of the most probable symbol required to decode the next symbol, and determines and outputs a value of the next symbol. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An arithmetic decoding method comprising:
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determining a range of a most probable symbol and a range of a least probable symbol which are required to decode a current symbol; 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 used to decode the current symbol; comparing a current offset and the range of the most probable symbol used to decode the current symbol, and determining a value of the current symbol; and comparing a next offset and the range of the most probable symbol used to decode the next symbol and determining a value of the next symbol. - View Dependent Claims (8, 9, 10, 11)
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12. A computer readable recording medium having embodied thereon a program for executing an arithmetic decoding method is stored, wherein the arithmetic decoding method comprises:
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determining a range of a most probable symbol and a range of a least probable symbol which are required to decode a current symbol; determining a range of a most probable symbol and a range of a least probable symbol required to decode a next symbol using a prediction that the current symbol is the most probable symbol used to decode the current symbol; comparing a current offset and the range of the most probable symbol used to decode the current symbol, and determining a value of the current symbol; and comparing a next offset and the range of the most probable symbol used to decode the next symbol, and determining a value of the next symbol. - View Dependent Claims (13, 14, 15, 16)
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Specification