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arithmetic coding for data compression

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Source : www.cs.duke.edu | Size : 223902

Arithmetic coding provides an e ective mechanism for remov . reduced-precision arithmetic has a provably negligible e ect on the .

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Content Summary :

Arithmetic coding provides an e ective mechanism for remov- ing redundancy in the encoding of data. We show how arithmetic coding works and describe an e cient implementation that uses table lookup as a fast alternative to arithmetic operations. The reduced-precision arithmetic has a provably negligible e ect on the amount of compression achieved. We can speed up the implemen- tation further by use of parallel processing. We discuss the role of probability models and how they provide probability information to the arithmetic coder. We conclude with perspectives on the comparative advantages and disadvantages of arithmetic coding. Index terms | Data compression, arithmetic coding, lossless compression, text modeling, image compression, text compres- sion, adaptive, semi-adaptive.

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