Data compression apparatus, and data compression program...

Details Data compression apparatus, and data compression program... Data compression apparatus, and data compression program...

2007-02-27

2007-02-27

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

C341S050000

Reexamination Certificate

active

11345546

ABSTRACT:
A data compression apparatus includes: a difference creating section that determines a difference between adjacent numerical values on continuity of numerical values constituting the data to be compressed so as to create new data to be compressed; an offset section wherein numerical values constituting the new data to be compressed consisting of the continued numerical values, which is created by the difference creating section, is subjected to an offset by a predetermined value; a divisional section that divides every numerical value of the data to be compressed, which is subjected to the offset by the offset section, into an upper significant digit bit portion and a lower significant digit bit portion; an upper significant data compression section that applies reversal compression processing to the upper significant digit data; and a lower significant data compression section that applies reversal compression processing to the lower significant digit data.

REFERENCES:
patent: 6657567 (2003-12-01), Koyanagi
patent: 6768818 (2004-07-01), Friederich et al.
patent: 5-328142 (1993-12-01), None
patent: 9-200540 (1997-07-01), None
patent: 10-164620 (1998-06-01), None
patent: 2001-520822 (2001-10-01), None
patent: WO 98/47234 (1998-10-01), None

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