Recording disk data playback apparatus

Details Recording disk data playback apparatus Recording disk data playback apparatus

1985-09-16

1987-10-06

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358343, 358342, 369 2, 369 50, H04N 576, G11B 700, G11B 1920

Patent

active

046986952

ABSTRACT:
A recording disk playback apparatus which is compatible with playback of both compact audio disks (CDs), having only a digitized audio signal recorded thereon, and recording disks having video and audio signals recorded by frequency modulation thereon together with a superimposed digitized audio signal (LDDs), includes means whereby a read-out clock signal which reads out temporarily stored digitized audio data from a memory is held fixed in frequency when a CD is being played, with closed-loop control of the speed of a CD drive motor being also executed, to thereby eliminate jitter in the demodulated audio signal, while during playing of an LDD the read-out clock signal is phase-locked with a playback clock signal.

REFERENCES:
patent: 4338683 (1982-07-01), Furukawa et al.
patent: 4439849 (1984-03-01), Nabeshima
patent: 4603412 (1986-07-01), Yamazaki
patent: 4611319 (1986-09-01), Naito

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