Magnetic recorder and regenerator

Details Magnetic recorder and regenerator Magnetic recorder and regenerator

1990-08-15

1991-07-02

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358311, H04N 979

Patent

active

050290126

ABSTRACT:
A magnetic recorder and regenerator has a luminate signal input terminal for receiving a luminance signal, a line-sequential signal input terminal for receiving a line sequential signal consisting of alternately line-sequenced color differential signals having a d.c. level difference, and a detecting circuit for detecting the d.c. level difference in the line-sequential signal which is provided from the regenerator system of one magnetic recorder and regenerator used for signal regeneration and which is to be transferred, before being rearranged into its component color differential signals, to the recorder system of another magnetic recorder and regenerator used for signal recording. A gain-controlled controlled amplifier is responsive to the output from the detecting circuit for adjusting the d.c. level difference in the line-sequential signal to a prescribed value, whereby it can suppress fluctuations in the line-sequantial signal level during a dubbing process, avoiding picture quality deterioration. The magnetic recorder and regenerator also has a clamping circuit for clamping the d.c. level of the line-sequential signal and a color differential signal discriminating circuit for discriminating between the R-Y and B-Y components of the line-sequential signal in synchronism with a horizontal synchronizing signal, and for providing a clamp timing signal to the clamping circuit to clamp the line-sequential signal correspondng to either one of the R-Y and B-Y components.

REFERENCES:
patent: 4335393 (1982-06-01), Pearson
patent: 4617590 (1986-10-01), Dann
patent: 4660071 (1987-04-01), Kuribayashi
patent: 4717968 (1988-01-01), Painton et al.
patent: 4746990 (1988-05-01), Katoh et al.
patent: 4750051 (1988-06-01), Kaneko et al.
patent: 4775897 (1988-10-01), Umemoto et al.
patent: 4791495 (1988-12-01), Umemoto et al.

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