Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-09-22
1983-08-16
Martin, John C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
328 53, 358160, 340728, H03K 5159, H04N 514, H03K 402, G09G 108
Patent
active
043994113
ABSTRACT:
A signal which changes from amplitude X to amplitude Z is applied to a resistor of value R which is series connected with an electrical L-C (inductor-capacitor) delay line unterminated at the opposite end and having a characteristic resistance of value R and one-way delay time T. An output terminal is coupled to the junction of the resistor and delay line. For a time duration 2 T after the input signal changes value, a signal of value (X+Z).div.2 appears at the output terminal and thereafter a signal of value Z appears.
REFERENCES:
patent: 2266154 (1941-12-01), Blumlein
patent: 3935384 (1976-01-01), Jirka
patent: 4334237 (1982-01-01), Reitmeier
Lim, "Reduction of Quantization Noise in Pulse Code Modulation Image Coding", Optical Engineering, Jul./Aug. 1980, vol. 19, No. 4, pp. 577-580.
Cantella Michael J.
Dion Donald F.
Martin John C.
RCA Corporation
Smiley R. E.
Tripoli J. S.
Troike R. L.
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