Optical recording medium having a dummy area at leading and/or t

Details Optical recording medium having a dummy area at leading and/or t Optical recording medium having a dummy area at leading and/or t

1996-07-10

1997-12-30

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 59, G11B 724

Patent

active

057038678

ABSTRACT:
A recording medium having a dummy signal area on at least one side of a recording area is used and information is recorded with a dummy signal added to at least one of the leading and trailing sides in the recorded information signal. The user data area remains unaffected by repeated overwriting so that recorded user data is reproduced correctly. In particular, the wave form distortion caused by fluidization of a recording film remains at the dummy signal area and does not affect the user data area, so that the reproduction of the target information (user data) is assured.

REFERENCES:
patent: 4734901 (1988-03-01), Murakami
patent: 4964128 (1990-10-01), Sako et al.
patent: 5151893 (1992-09-01), Yamasaki et al.
patent: 5210734 (1993-05-01), Sakurai
patent: 5388105 (1995-02-01), Takagi et al.

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