Dual standard video disc player

Details Dual standard video disc player Dual standard video disc player

1978-06-23

1980-05-20

Moffitt, James W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 4, 358 11, H04N 576

Patent

active

042042208

ABSTRACT:
Video disc player is switchable between two operating modes: (1) for playback of records of color signals of one scanning standard (15,625 Hz. line frequency; 50 Hz. field frequency) encoded in a buried subcarrier format; (2) for playback of records of color signals of another scanning standard (15,734.26 Hz. line frequency; 59.94 Hz. field frequency) also encoded in a buried subcarrier format, but with a different subcarrier frequency. When operating in mode (1), recovered signals are heterodyned with output of a VCO to up-convert chrominance signal and accompanying color synchronizing component. Control of VCO is effected in accordance with output of a phase detector responding to up-converted color synchronizing component and to reference oscillations, whereby up-converted signals are stabilized against time-base errors. Switching to mode (2) effects a shift of reference oscillation frequency (or of nominal VCO output frequency) by an amount equal to frequency difference between respective subcarrier frequencies.

REFERENCES:
patent: 3845237 (1974-10-01), Yamakawa
patent: 3872498 (1975-03-01), Pritchard
patent: 3893164 (1975-07-01), Raedecke
patent: 3917415 (1975-11-01), Eguchi
patent: 3969757 (1976-07-01), Amery
patent: 3974520 (1976-08-01), Kuroyanagi
patent: 3996610 (1976-12-01), Kawamoto

Affiliated with

Also associated with

Rating

Dual standard video disc player does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual standard video disc player, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual standard video disc player will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-452250