Patent №
US 4,866,440
Granted
1989-09-12
Filed 1987
Owner
HITACHI, LTD., 6, KANDA SURUGADAI 4-CHOME, CHIYODA-KU, TOKYO, JAPAN A CORP. OF JAPAN
Lab
—
AI components
1
hardware
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
07129185
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.
AI classification
Ownership
HITACHI, LTD., 6, KANDA SURUGADAI 4-CHOME, CHIYODA-KU, TOKYO, JAPAN A CORP. OF JAPAN
assignment · 47990469
Assignors
TSUKIYAMA, TOKUHIRO, SAGARA, YASUNORI, MIYAZAWA, KAZUMI
On an employer assignment, the assignors are typically the inventors.