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US 3,947,871 AGranted
Color video signal reproducing apparatus
AssigneeSony Corporation
InventorsShinji Amari, Kazuo Yamagiwa
Life of this patent
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Abstract
In a color video signal reproducing apparatus having a plurality of magnetic heads, chrominance signals contained in color video signals respectively reproduced by the plurality of magnetic heads are separately subjected to level or gain control with a view to being equal in level, the levels of the respective chrominance signals are discriminated or detected and, when the level of any one or more of the chrominance signals is outside the control range of the above level or gain control, a so-called color killer operation is carried out.
Claims8
A color video signal reproducing apparatus comprising
- a plurality of rotary heads operative in a cyclically repeated order to successively reproduce recorded color video signals containing luminance and chrominance components;
- an output terminal;
- circuit means for transmitting the successively reproduced signals from said rotary heads to said output terminal and including variable gain means operative on at least said chrominance component of the reproduced signals, and color killer means operative to eliminate said chrominance component from the reproduced signals as received at said output terminal
- gain control means including a plurality of control signal elements respectively corresponding to said plurality of rotary heads and each being operative to apply a respective gain control signal to said variable gain means during reproducing of the recorded color video signals by the respective one of said rotary heads;
- and
- color killer control means for effecting continuous operation of said color killer means so long as the level of the reproduced signals from any of said rotary heads is below a predetermined level.
3 more elements
Dependencies are inferred from the claim text.