Edge detection of information pit pattern by establishing thresh

Details Edge detection of information pit pattern by establishing thresh Edge detection of information pit pattern by establishing thresh

1993-06-22

1995-03-21

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 59, 369124, G11B 726

Patent

active

054003180

ABSTRACT:
In an edge detection method, a tightest data portion for forming a tightest pit pattern therein is provided in an area in the front of an effective data portion where an information pit pattern is formed, and the threshold voltage is established on the basis of the tightest pit pattern formed in the tightest data portion.

REFERENCES:
patent: 4743774 (1988-05-01), Maeda et al.
patent: 4866692 (1989-09-01), Saito et al.
patent: 4961182 (1990-10-01), Saito et al.
patent: 5218591 (1993-06-01), Shimamoto et al.
patent: 5233589 (1993-08-01), Saito et al.
Patent Abstracts of Japan, Jun. 18, 1988, "Recording/Reproducing System", Saito Atsuhi, vol. 12, No. 408.

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