Optical disc with pregrooves and recording method and apparatus

Details Optical disc with pregrooves and recording method and apparatus Optical disc with pregrooves and recording method and apparatus

1989-06-26

1991-09-24

Envall, Jr., Roy N.

Facsimile and static presentation processing

Facsimile

Recording apparatus

369 4438, 3692751, 3692754, G11B 7007, G11B 7095

Patent

active

050518364

ABSTRACT:
An optical disc with pregrooves arranged circumferentially so as to define a track area, and recording method and apparatus using an optical disc of that type. The disc is characterized by horizontal sync signal formed regions in which the pregrooves are formed in an intermittent manner along a circumference. The recording method and apparatus are characterized by performing a recording operation by irradiating a recording light beam modulated by a video format signal on a track area of an optical disc with pregrooves, generating a sync pulse signal having pulses corresponding to the horizontal sync signal forming area, from an electric signal obtained by a photo-electric conversion of a reflection signal from the optical disc, detecting the phase difference between the sync pulse signal and a horizontal sync pulse signal in the video format signal, and delaying the video format signal in accordance with the magnitude of the phase difference.

REFERENCES:
patent: 4380015 (1983-04-01), Ito et al.
patent: 4451863 (1984-05-01), Yamagida et al.
patent: 4460926 (1984-07-01), Nakamuta
patent: 4535366 (1985-08-01), Pullen
patent: 4555734 (1985-11-01), Fukui
patent: 4707816 (1987-11-01), Yonezawa et al.
patent: 4750163 (1988-06-01), Yamamiya et al.
patent: 4761692 (1988-08-01), Yoshida et al.
patent: 4783776 (1988-11-01), Ishigaki et al.
patent: 4855977 (1989-08-01), Getreuer et al.
patent: 4866688 (1989-09-01), Ohtake et al.
Optical Memory Symposium, "Externally Synchronized Reproduction in an Optical Disc File", 1986, pp. 197-200.

Affiliated with

Also associated with

Rating

Optical disc with pregrooves and recording method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disc with pregrooves and recording method and apparatus , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc with pregrooves and recording method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1701040