Method for compressing and restoring data series and apparatus f

Details Method for compressing and restoring data series and apparatus f Method for compressing and restoring data series and apparatus f

1987-12-07

1989-09-12

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

Byte length changed

341 59, 341 67, H03M 746

Patent

active

048664405

ABSTRACT:
A data compression and restoration method and an apparatus for realizing same, by which, when identical data patterns appear successively in data information, which may be recorded in a magnetic tape, etc., the data patterns are subjected to a compression operation, the data thus compressed is recorded, and it is restored at the reproduction. When the data patterns appear successively, they are compressed, and the data patterns generated by the compression are subjected to a second compression, after they have been rearranged for the purpose of the second compression. In this way it is possible to record data significantly compressed.

REFERENCES:
patent: 4542515 (1985-09-01), Gutleber
patent: 4558302 (1985-12-01), Welch
patent: 4586027 (1986-04-01), Tsukiyama
patent: 4701745 (1987-10-01), Waterworth
patent: 4814746 (1989-03-01), Miller et al.

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