Title:
OPTICAL RECORDING MEDIUM, ITS RECORDING METHOD, ITS REPRODUCING METHOD, AND METHOD FOR GENERATING TRACKING ERROR SIGNAL
Document Type and Number:
WIPO Patent Application WO/1993/017417
Kind Code:
A1
Abstract:
A recording medium on which information data is optically recorded. In the recording region of the optical recording medium, the space between the n-th recording track and the preceding (n-1)-th recording track is smaller than the diameter of the spot of the projected light beam. On the n-th recording track, recorded is the data obtained by performing logical operation of the data recorded on the (n-1)-th recording track and the data to be recorded. Thereby, the capacity of storing information is increased. The information recorded on the optical recording medium is reproduced by the detector having first and second light receiving parts which are separated by a boundary line parallel to the recording tracks of the optical recording medium. The reflected light of the light beam projected over the adjacent two recording tracks are received by the detector. According to the level of the signal which is the sum of or the difference between the signals outputted from the first and second light receiving parts, the information recorded on the optical recording medium is read and reproduced.
Inventors:
HORIMAI HIDEYOSHI (JP)
FUJITA GORO (JP)
FUJITA GORO (JP)
Application Number:
PCT/JP1993/000205
Publication Date:
September 02, 1993
Filing Date:
February 19, 1993
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G11B7/0045; G11B7/005; G11B7/09; G11B7/14; G11B7/26; G11B20/14; H03M5/14; G11B7/007; (IPC1-7): G11B7/00; G11B7/09; G11B7/095
Foreign References:
| JPH01134728A | 1989-05-26 | |||
| JPH0428016A | 1992-01-30 | |||
| JPH03119523A | 1991-05-21 | |||
| JPH02185717A | 1990-07-20 | |||
| JPS58158044A | 1983-09-20 |
Other References:
See also references of EP 0580876A4
Attorney, Agent or Firm:
Koike, Akira (11 Mori Bldg. 6-4, Toranomon 2-chom, Minato-ku Tokyo 105, JP)
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