Apparatus for improving video signal-to-noise ratio

Details Apparatus for improving video signal-to-noise ratio Apparatus for improving video signal-to-noise ratio

1972-03-13

1978-05-16

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, 358136, 358167, H04N 712, H04N 521

Patent

active

040902218

ABSTRACT:
An input video signal is coupled to one input of a summing amplifier, to the input of a low-pass filter, and to one input of a movement detector. The output signal from the apparatus is delayed by one frame interval, and this delayed output signal is coupled to a second input of the summing amplifier and to a second input of the movement detector. The movement detector is of a type which generates a control signal to indicate movement in response to a plurality of frame-to-frame differences for adjacent picture elements. This control signal is utilized to selectively gate either the output from the summing amplifier or the output of the low-pass filter through to an output terminal.

REFERENCES:
patent: 2906816 (1959-09-01), Kretzmer
patent: 3184542 (1965-05-01), Horsley
patent: 3265810 (1966-06-01), Falk
patent: 3594498 (1971-07-01), Smith
patent: 3674920 (1972-07-01), Faroudja

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