Channel level adjusting apparatus

Details Channel level adjusting apparatus Channel level adjusting apparatus

1979-03-02

1980-12-09

Bookbinder, Marc E.

Facsimile and static presentation processing

Static presentation processing

Attribute control

328173, 330126, 333132, 455 6, 455232, 455304, 455306, H04N 716

Patent

active

042387663

ABSTRACT:
A channel level adjusting apparatus for equalizing the amplitude level of the received television signals of a plurality of channels. The channel level adjusting apparatus is designed so that when the input amplitude level of the television signals of a relatively small number or at least one channel is different from the more nearly equal or uniform input amplitude level of the television signals of the remaining relatively large number of channels, only the television signal or signals of the higher amplitude level are taken out, attenuated to a desired level and then combined, with a 180-degree phase difference, with the television signals of all the channels, thus making the television signal or signals of the higher input amplitude level more nearly equal in amplitude level to the television signal or signals of the lower input amplitude level and thereby generating the television signals of all the channels having relatively uniform amplitude levels.

REFERENCES:
patent: 2711516 (1955-06-01), Fredendall
patent: 2737628 (1956-03-01), Haines
patent: 3755754 (1973-08-01), Putz
patent: 3818362 (1974-06-01), Van Sluys

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