Data compressing apparatus, data restoring apparatus and data co

Details Data compressing apparatus, data restoring apparatus and data co Data compressing apparatus, data restoring apparatus and data co

1995-11-02

1998-08-18

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

Adaptive coding

341 67, H03M 740

Patent

active

057963568

ABSTRACT:
In a data compressing apparatus, when a data input unit inputs unit data, a coding unit obtains an order corresponding to the input unit data and outputs a code corresponding to this order with reference to a compression table. When completing this coding process, a compression table updating unit changes the order of the unit data in the compression table in a self-organizing manner based on only that order. In a data restoring apparatus, when a code input unit inputs the code as a result of the compression, a data restoring unit obtains another corresponding to the inputted code and outputs the unit data corresponding to this order with reference to a restoration table. When completing this coding process, a restoration table updating unit changes the order of the unit data in the restoration table in the self-organizing manner based on only that order.

REFERENCES:
patent: 4870662 (1989-09-01), Lindbergh et al.
Liu et al., "Cam-Based VLSI Architectures For Dynamic Huffman Coding", IEEE Transactions, vol. 40, No. 3 pp. 282-288 (Aug. 1, 1994).
Anderson, "Overview of Huffman Encoding as Compression Technique", Computer Technology Review, vol. 11, No. 6, pp. 97-98, 100-101 (May 1, 1991).
Ramabadran et al., "An Adaptice Algorithm for the Compression of Computer Data", IEEE Transactions, vol. 37, No. 4, pp. 317-324 (Apr. 1, 1989).

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