Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2007-08-28
2007-08-28
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S059120
Reexamination Certificate
active
10853985
ABSTRACT:
A method of recording and reproducing information in a phase-change optical recording medium by irradiation of an electromagnetic wave for recording, reproducing and/or rewriting information is proposed, wherein when information is recorded in the phase-change optical recording medium by modulating an input signal and conducting pulse width modulation recording, a recording pulse string for recording and rewriting is a continuous electromagnetic wave, and a recording pulse string for recording and rewriting, after the modulation of the input signal, is an electromagnetic wave pulse string having a front-pulse portion fp, a multi-pulse portion mp with a total pulse duration period T and a duty ratio y, and an off-pulse portion op, wherein the duty ratio y is decreased as a recording linear velocity for the phase-change optical recording medium is increased, whereby multi-speed recording or CAV (constant angular velocity) recording is carried out. An information recording and reproducing apparatus, using the above method, is also proposed.
REFERENCES:
patent: 5412626 (1995-05-01), Ohno et al.
patent: 5732062 (1998-03-01), Yokoi et al.
patent: 5740149 (1998-04-01), Iwasaki et al.
patent: 5761179 (1998-06-01), Iwasaki et al.
patent: 5790505 (1998-08-01), Abe et al.
patent: 5974025 (1999-10-01), Yamada et al.
patent: 6188656 (2001-02-01), Shoji et al.
patent: 6205102 (2001-03-01), Spruit
patent: 6236635 (2001-05-01), Miyamoto et al.
patent: 6280810 (2001-08-01), Nakamura et al.
patent: 6438085 (2002-08-01), Kato et al.
patent: 6459666 (2002-10-01), Yokoi
patent: 6757232 (2004-06-01), Yamada et al.
patent: 06-012674 (1994-01-01), None
patent: 09-138947 (1997-05-01), None
patent: 09-282661 (1997-10-01), None
Kato Masaki
Nakamura Yuki
Yamada Katsuyuki
Cooper & Dunham LLP
Ricoh Company, Ltd
Tran Thang V.
LandOfFree
Method of recording and reproducing information and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of recording and reproducing information and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of recording and reproducing information and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3883376