Measurement of noise impairments of TV signals

Details Measurement of noise impairments of TV signals Measurement of noise impairments of TV signals

1995-06-07

1997-08-26

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348180, H04N 521

Patent

active

056615299

ABSTRACT:
A method for determining the composite triple beat (CTB), composite second order beat (CSO) and/or SNOW noise of cable television signal is obtained by digitizing a quiet line and determining the Fourier transform of the digitized signal and measuring the energy in the frequency range corresponding to the particular impairment of being determined. Repeating this process a significant number of time to accumulate a significant number N of values for the impairment and then using the average of the accumulated intensity to define the amount of the impairment.

REFERENCES:
patent: 3729681 (1973-04-01), Elder
patent: 4022989 (1977-05-01), Hoppough
patent: 4855827 (1989-08-01), Best
patent: 5221967 (1993-06-01), Ward et al.
patent: 5323239 (1994-06-01), Ward et al.
patent: 5329311 (1994-07-01), Ward et al.

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