Recording disk data playback apparatus

Details Recording disk data playback apparatus Recording disk data playback apparatus

1985-09-16

1987-10-27

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358343, H04N 576

Patent

active

047033673

ABSTRACT:
A recording disk data playback apparatus capable of playback of recording disks having a video signal usually with an audio signal recorded thereon by frequency modulation, together with audio data modulated as a pulse train superimposed thereon, includes a phase-lock loop circuit for generating a read-out clock signal to read out from a memory the playback digital audio data, in which that data has been temporarily stored, with the loop circuit including a filter whose cut-off frequency is selected to be lower than the maximum frequency of the bandwidth of a tangential servo system which controls movement of a data sensing light spot tangential to the recording tracks. Jitter which cannot be fully corrected by the tangential servo system is thereby eliminated.

REFERENCES:
patent: 4481615 (1984-11-01), Hioki
patent: 4535366 (1985-08-01), Pullen

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