Spindle servo device for data recording disk reproducing apparat

Details Spindle servo device for data recording disk reproducing apparat Spindle servo device for data recording disk reproducing apparat

1988-12-22

1989-12-05

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358338, 358341, 369 50, 369 54, 369 58, 360 7303, G11B 700

Patent

active

048856444

ABSTRACT:
An apparatus for playing a composite disk containing separate audio-only and video-plus-audio portions, as well as an ordinary compact disk. It is first detected whether the disk being played is a compact disk or a composite disk, and if the disk is a composite disk, whether the portion presently being played is a region containing only audio data or a region containing a frequency modulated video signal recorded in multiplex form with a digital signal. A reference signal for driving a spindle servo circuit is produced as a fixed frequency signal when the disk is a composite disk or the region of a composite disk being played contains only audio data, and as a variable frequency signal of frequency determined in accordance with the frame sync signal contained in the reproduced signal when a region of a composite disk containing a multiplex-type signal is being reproduced.

REFERENCES:
patent: 4611319 (1986-09-01), Naito
patent: 4698695 (1987-10-01), Kosaka et al.

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