Optical disk apparatus for selectively recording and reproducing

Details Optical disk apparatus for selectively recording and reproducing Optical disk apparatus for selectively recording and reproducing

1991-11-19

1993-10-19

Chin, Tommy

Facsimile and static presentation processing

Facsimile

Recording apparatus

358335, 358310, H04N 576, H04N 585

Patent

active

052551032

ABSTRACT:
An optical apparatus digitizes a first signal, reproduce or records and reproduce the digital information compressed a band up to a specified bit rate A1 at a specified rotating speed K or specified linear velocity V, digitizes a second signal, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A2 at a rotating speed of about K.times.A2/A1, or a linear velocity of about V.times.A2/A1, and thereby reproduces or records and reproduces information of plural signals, or reproduce or records and reproduces information of plural compression rates using only one apparatus. It also digitizes a first signal, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A1 in n optical channels, digitizes a second piece of information, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A2 in about n.times.A2/A1 optical channels, and thereby reproduces records and reproduces information of plural signals, or reproduces or records and reproduces information of plural compression rates using only one apparatus without notably varying the rotating speed or linear velocity. It further enters the light emitted from a semiconductor laser into a nonlinear optical device (SHG), and reproduces the information on a disk surface or records and reproduces the information on a disk surface using the secondary harmonics delivered from the nonlinear optical device.

REFERENCES:
patent: 4535366 (1985-08-01), Pullen
patent: 4862292 (1989-08-01), Enari et al.
patent: 4914523 (1990-04-01), Maruta
patent: 5075802 (1991-12-01), Ohashi
"Optical Video Disc System for HDTV", Saeki et al., Conference Proceedings, 1989, Amsterdam, pp. 519-526.
"A Write-Once Video Disc Recording System Using Time-Division Multiplexing", Owa et al., IEEE 1990, pp. 42-43.

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