Data coding and decoding with improved efficiency

Details Data coding and decoding with improved efficiency Data coding and decoding with improved efficiency

1992-10-26

1995-04-11

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

To or from number of pulses

341 51, 341107, H03M 730

Patent

active

054062829

ABSTRACT:
An appearance probability forecasting device forecasts an appearance probability that a symbol described by data will be a predetermined symbol. An initial value varying device varies an initial value of the appearance probability in accordance with the type of the data. A coding device codes the data, based on the initial value of the appearance probability, the symbols actually described by the data, and the appearance probability forecast by the appearance probability forecasting device.

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Pennebaker, et al., "An overview of the basic principles of the Q-Coder adaptive binary arithmetic coder", IBM J. Res. Develop. vol. 32 No. 6, Nov. 1988, pp. 717-726.
Langdon, et al., "Compression of Black-White Images with Arithmetic Coding", IEEE Transactions Communications, vol. COM-29, No. 6, Jun. 1981, pp. 858-867.

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