Color difference line sequential circuit in a magnetic recording

Details Color difference line sequential circuit in a magnetic recording Color difference line sequential circuit in a magnetic recording

1986-10-09

1988-06-07

Perkey, W. B.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 14, 358 34, H04N 979

Patent

active

047500514

ABSTRACT:
A color difference line sequential circuit for use in a magnetic recording apparatus such as an electronic still camera or the like in which an image signal is frequency modulated and is then recorded in a magnetic recording medium. The color difference line sequential circuit can eliminate the effects of a clamping operation performed when a color difference signal is line sequentialized.
In the color difference line sequential circuit, when the color difference signals are line sequentialized in a recording system, the direct current levels of color difference signals R-Y, B-Y during the blanking periods thereof are clamped by two kinds of clamp pulses output every 2 H and different 180.degree. from each other in phase, respectively, and one of the two color difference signals that is not clamped is selectively taken in and line sequentialized by a select signal created based on the above two clamp pulses, whereby it is possible to prevent the deterioration of the quality of reproduced pictures due to a clamping operation in recording.

REFERENCES:
patent: 3717725 (1973-02-01), Numakura
patent: 4183050 (1980-01-01), Tsuchiya et al.
patent: 4617590 (1986-10-01), Dann
patent: 4654726 (1987-03-01), Kluth

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