Optical recording and reproducing apparatus having discrete opti

Details Optical recording and reproducing apparatus having discrete opti Optical recording and reproducing apparatus having discrete opti

1994-11-14

1996-10-08

Hindi, Nabil Z.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 48, 369 58, G11B 700

Patent

active

055638554

ABSTRACT:
An optical recording and reproducing apparatus records the audio and video signals to an optical disk by dividing the audio and video signals for one frame into top and bottom audio and video signal components. The top and bottom audio signal component are recorded to a predetermined track on disk sides A and B referenced to the rotation position detection information preformatted thereon, respectively. A mode set panel produces a mode signal for switching the operating mode. A mode determiner produces the head operation mode signal for determining the operating mode of the optical heads based on the signal. Top and bottom heads record and reproduce audio and video signals to or from the two sides A and B, respectively. Top and bottom vertical synchronization mark generators produce the vertical synchronization marks from the sector of the optical disk preformatted for recording and reproducing audio and video signals. Head actuators drive the pickup. The top head operating mode determiner, to which the operating mode data and the vertical synchronization mark signal are input, determines the operating mode of the top optical head. The bottom head mode determiner, to which the operating mode data and the bottom vertical synchronization mark signal are input, determines the operating mode of the bottom optical head.

REFERENCES:
patent: 4845696 (1989-07-01), Ohtsuki et al.
patent: 5148416 (1992-09-01), Hoshino et al.
patent: 5163033 (1992-11-01), Yanagi

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