Arithmetic compression coding using interpolation for ambiguous

Details Arithmetic compression coding using interpolation for ambiguous Arithmetic compression coding using interpolation for ambiguous

1990-07-19

1992-08-25

Logan, Sharon D.

Coded data generation or conversion

Digital code to digital code converters

To or from code based on probability

341106, 341109, H03M 726

Patent

active

051422832

ABSTRACT:
A method for substituting interpolated values for ambiguous symbols in an arithmetically encoded symbol string, symbols in the unencoded original string being drawn from a Markov source and a finite alphabet. Ambiguity of a symbol is defined as where its symbol occurrence statistic lies outside of a predetermined range. Interpolation involves selectively combining the occurrence statistics of symbols adjacent the ambiguous symbol and recursively and arithmetically encoding the combined statistics. The method otherwise encodes unambiguous symbols in a conventional arithmetic manner. The decoding duals are also described.

REFERENCES:
patent: 3701108 (1972-10-01), Loh et al.
patent: 4494108 (1985-01-01), Langdon, Jr. et al.
patent: 4881075 (1989-11-01), Weng
patent: 4891643 (1990-01-01), Mitchell et al.
patent: 5023611 (1991-06-01), Chamzas et al.

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