Audio data readout device for motion picture film and clock gene

Details Audio data readout device for motion picture film and clock gene Audio data readout device for motion picture film and clock gene

1995-03-07

1997-03-04

Metjahic, Safet

Optics: motion pictures

With sound accompaniment

Common picture and sound record carrier systems

352 7, G03B 3102, G03B 3100

Patent

active

056084730

ABSTRACT:
An audio data readout device for a motion picture film and a clock generating device in a changeover system for a motion picture film. First and second clock generating circuits generate first and second clocks of predetermined frequencies based upon a repetition frequency of perforations detected by first and second film readers and a repetition frequency of a track pitch of audio data, and route the resulting clocks to a changeover switch. At a changeover time, a changeover controller switchingly controls the changeover switch to select the second clock. A system clock generating circuit has loop characteristics of a longer time constant than the first or second clock generating circuits and smoothly locks the second clock to generate a system clock which is outputted. A stable and accurate system clock can be generated and outputted even when film running is unstable at the changeover time.

REFERENCES:
patent: 1775019 (1930-09-01), Cook
patent: 1893576 (1933-01-01), Brocius
patent: 4218115 (1980-08-01), Parker
patent: 5327182 (1994-07-01), Kohut et al.

Affiliated with

Also associated with

Rating

Audio data readout device for motion picture film and clock gene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Audio data readout device for motion picture film and clock gene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio data readout device for motion picture film and clock gene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2149631