Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1995-06-05
1997-03-18
Hindi, Nabil
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 54, 369 53, G11B 700
Patent
active
056129335
ABSTRACT:
An apparatus for reproducing recorded information reads information from the track surface of a CD-ROM disk 1, performs error detection and correction processing on the read information to reproduce recorded information and then outputs the reproduced information. This apparatus includes a control device 11, which switches a reproduction operation to the standard speed mode in response to a correction failure condition generated in the quadruple speed mode and retries standard-speed reading of the information read with an error uncorrectable in the quadruple speed mode. Reducing the signal read speed to one-fourth in the retry processing at the standard speed improves the C/N ratio of the high-frequency signal RF by 6 dB, which in turn improves the correction capability for random errors.
REFERENCES:
patent: 4752846 (1988-06-01), Proehl
patent: 4821125 (1989-04-01), Christensen et al.
patent: 5128946 (1992-07-01), Ogino et al.
patent: 5313443 (1994-05-01), Iitsuka
patent: 5349481 (1994-09-01), Kauffman et al.
Hara Kazuya
Iso Yoshimi
Rokusaka Akihiko
Sato Hideaki
Watanabe Toshihiko
Hindi Nabil
Hitachi , Ltd.
Hitachi Microcomputer System Ltd.
LandOfFree
Apparatus for reproducing recorded information with error detect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for reproducing recorded information with error detect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for reproducing recorded information with error detect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1711277