Optical recording medium having a specified range of pit widths

Details Optical recording medium having a specified range of pit widths Optical recording medium having a specified range of pit widths

1997-05-05

1998-11-17

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, G11B 724

Patent

active

058386548

ABSTRACT:
Even if grooves are, in order to improve productivity, omitted from an optical recording medium having pits indicating information signals formed in at least a portion of recording tracks of the optical recording medium, signals having satisfactorily high levels required to perform tracking control are attempted to be obtained. The number of regions of the recording tracks in which the pits are formed is made to be larger than the number of regions in which no pit is formed. Specifically, since "0" has higher appearance probability than "1" in a case of a binary information signal consisting of "0" and "1", pits are formed at positions corresponding to "0" of the information signal.

REFERENCES:
patent: 5204852 (1993-04-01), Nakagawa et al.
patent: 5477527 (1995-12-01), Tsuchiya et al.
patent: 5499229 (1996-03-01), Murakami et al.
patent: 5661706 (1997-08-01), Ohtomo

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