Non-linear keyer

Details Non-linear keyer Non-linear keyer

1989-10-06

1990-10-30

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358181, 358182, H04N 522

Patent

active

049672770

ABSTRACT:
A non-linear keyer breaks a key processor transfer function into two pieces, one above and one below a clip level. Each piece may be modified independently and then recombined to produce the desired non-linear transfer function.

REFERENCES:
patent: 3602646 (1971-08-01), Goldberg
patent: 4001498 (1977-01-01), Morishita et al.
patent: 4028727 (1977-06-01), Skrydstrou
patent: 4141041 (1979-02-01), Peters
patent: 4160994 (1979-07-01), Mendrala
patent: 4218711 (1980-08-01), Kashigi
patent: 4887159 (1989-12-01), Chaplin

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