Video recorder having means for maintaining constant the amplitu

Details Video recorder having means for maintaining constant the amplitu Video recorder having means for maintaining constant the amplitu

1977-10-13

1980-03-11

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

360 30, 360 33, H04N 5785, G11B 504

Patent

active

041930843

ABSTRACT:
In apparatus for recording, or otherwise transmitting, video or other information signals, and in which at least a portion of the signal to be recorded, for example, the luminance component of a color video signal, is frequency modulated and then passed through a filter for limiting the frequency band of the resulting frequency modulated component or signal which is recorded; a signal processor, such as, an automatic gain control or limiter, acts on the frequency modulated output of the filter to eliminate or compensate for amplitude variations that may occur therein by reason of the filter, for example, at portions of the signal where substantial pre-emphasis was applied.

REFERENCES:
patent: 1849620 (1932-03-01), Hansell
patent: 2081577 (1937-05-01), Crosby
patent: 3205442 (1965-09-01), Stamboulis
patent: 3283252 (1966-11-01), Mead et al.
patent: 3715468 (1973-02-01), Fujita
patent: 3969755 (1976-07-01), Arimura et al.
patent: 4012771 (1977-03-01), Ishigaki et al.

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