Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1994-03-25
1996-05-07
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
H03M 112
Patent
active
055150497
ABSTRACT:
A noise-reducing circuit for performing effective noise reduction without an accompanying trailing phenomenon or other adverse effects with respect to the edge of a moving image portion. Digital sample values as output from an A/D converter are input to a waveform equalizer, which performs prescribed waveform equalizing processing with a MUSE format resample condition being met. In a noise reducing unit, for the various resample values from waveform equalizer, the correlation value in the impulse response waveforms corresponding to the resample values is derived from the sample values around the resample value and the other resample values, and the sum of the resample value and the correlation value is calculated. In this way, a resample value with an increased signal
oise ratio can be obtained at the output terminal of the noise reducing unit.
REFERENCES:
patent: 5089917 (1992-02-01), Kanota et al.
patent: 5353069 (1994-10-01), Kobo et al.
Donaldson Richard L.
Guttman David S.
Texas Instruments Incorporated
Young Brian K.
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