Methods and apparatus for measuring signal-to-noise ratio

Details Methods and apparatus for measuring signal-to-noise ratio Methods and apparatus for measuring signal-to-noise ratio

1978-03-09

1979-10-23

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

325 67, 325363, 328188, H04N 702

Patent

active

041722639

ABSTRACT:
Methods and apparatus are disclosed for measuring signal-to-noise ratio in video waveforms based on a novel application of the tangential noise measurement principle. A calibrated video staircase test waveform is generated at the transmit end which permits a direct noise reading in dB at the measurement location by use only of a general purpose oscilloscope and associated band limiting and weighting filters. The measurement is fast, straightforward and objective in nature.

REFERENCES:
patent: 3825835 (1974-07-01), Hammett
patent: 3995105 (1976-11-01), Krivosheev
"Optek Type 1010B Video Noise Meter," Jul. 8, 1975.
Weaver, L. E., Television Video Transmission Measurements, Luton, England, White Cresent Press, Ltd., 1973, pp. 67-77.

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