Signal processing apparatus for changing the frequency character

Details Signal processing apparatus for changing the frequency character Signal processing apparatus for changing the frequency character

1992-03-10

1994-03-29

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

358340, H04N 5213

Patent

active

052990036

ABSTRACT:
A signal processing apparatus for changing the frequency characteristics of an input signal, e.g.--a video or audio signal, allows a signal to pass through a transmission circuit in a positive time sequence and then, allows the signal to be transmitted through another transmission circuit having the same transmission characteristics in a reverse time sequence with respect to the positive time sequence. Also, while the transmission circuit is arranged to have a zero-phase characteristic, each segment of a continuous signal is processed throughout a period which is equal to at least two times a duration of an impulse response direction of the transmission circuit. Accordingly, unwanted wave errors appearing at discontinuous regions of the signals are eliminated.

REFERENCES:
patent: 4611231 (1986-09-01), Kobayashi
patent: 4908581 (1990-03-01), Honjo
patent: 5117291 (1992-05-01), Fadavi-Ardekani et al.
patent: 5126846 (1992-06-01), Niimura

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