Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2006-02-14
2006-02-14
Edun, Muhammad (Department: 2655)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044280, C369S044410, C369S044370, C369S053200, C369S053130, C369S053100
Reexamination Certificate
active
06999387
ABSTRACT:
With a CD laser, a focusing search is carried out to detect a value CD-FE(pp) which is a difference between a maximum value and a minimum value of a focusing error signal, and to detect a value CD-AS which is a maximum value of a full-added signal. With a DVD laser, the focusing search is carried out to detect a value DVD-FE(pp) which is a difference between a maximum value and a minimum value of the focusing error signal, and to detect a value DVD-AS which is the maximum value of a full-added signal. The value that DVD-FE(pp) is divided by DVD-AS(max), is divided by the value that CD-FE(pp) is divided by CD-AS(max). According to whether the computed result by division is larger or not than a threshold value, it is determined whether the disk100is of a CD standard or of a DVD standard.
REFERENCES:
patent: 5088078 (1992-02-01), Moriwaki et al.
patent: 6314064 (2001-11-01), Ueda et al.
patent: 6721242 (2004-04-01), Ohnishi et al.
patent: 2001-351315 (2001-12-01), None
No affiliations
Edun Muhammad
Morgan & Lewis & Bockius, LLP
LandOfFree
Disk reproducing apparatus and disk type identifying method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disk reproducing apparatus and disk type identifying method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk reproducing apparatus and disk type identifying method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3647297