Apparatus for controlling reproduction speed for laser disc play

Details Apparatus for controlling reproduction speed for laser disc play Apparatus for controlling reproduction speed for laser disc play

1994-09-23

1996-09-24

Tran, Thai Q.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358343, H04N 5781

Patent

active

055596070

ABSTRACT:
An apparatus for controlling the reproduction speed for laser disc player is disclosed. When audio and video signals recorded on a disc are reproduced by an optical pick-up, if an accelerating or decelerating signal is supplied from a speed controlling inputting part to a micro-processor, then the micro-processor outputs a speed control signal to the speed control part. The speed control part outputs a main clock (which is varied in accordance with the received control signal) to a video signal processing and pulse width modulation signal generating part. Then the video signal processing and pulse width modulation signal generating part outputs a modified spindle motor driving pulse width. Further, after receipt of the main clock, the video signal processing and pulse width modulation signal generating part supplies to an A/D converter the video signals which are extracted from the microwave signals which are outputted from the optical pick-up part. Then the A/D converter carries out a sampling on the received video signals based on A/D clocks to A/D convert them and to output them as digital data. The digital data signals are made to pass through an interpolator or a decimator to be outputted to the video signal processing part.

REFERENCES:
patent: 4429335 (1984-01-01), Sugiyama et al
patent: 4819059 (1989-04-01), Pape
patent: 4847701 (1989-07-01), Suesada
patent: 4858030 (1989-08-01), Oku et al.
patent: 4864428 (1989-09-01), Kanamaru

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