Method and apparatus for correcting edge interval of record sign

Details Method and apparatus for correcting edge interval of record sign Method and apparatus for correcting edge interval of record sign

1993-11-01

1994-09-06

Chin, Tommy P.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, 369 58, 369 59, G11B 700

Patent

active

053454340

ABSTRACT:
In a data recording operation, various patterns each having n edge widths (n is an integer), which are considered to appear in the operation, are predicted such that a record pattern sequence including the various patterns is recorded before an actual data recording operation. Using a read-out signal thereof, a shift quantity of each edge of the read-out signal with respect to an inherent edge record position is attained, thereby generating a table containing relationships between the respective patterns and the edge shift quantities. During an actual data recording operation, a record signal of the data is collated in a unit of the n edge widths with the patterns stored in the table so as to correct the edge width.

REFERENCES:
patent: 4631713 (1986-12-01), Romeas et al.
patent: 4855988 (1989-08-01), Shinbayashi et al.
patent: 4858219 (1989-08-01), Yoshikawa
patent: 4979162 (1990-12-01), Kimoto et al.
patent: 5043971 (1991-08-01), Van et al.
patent: 5072435 (1991-12-01), Bakx
"Application of Pit Edge Recording on PbTeSe Thin Films"; Saito et al.; p. 4-176 of the Digest of the National Confer. on 70th Anniversary of the IECE of Japan.

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