Noise removal apparatus and an FM receiver

Details Noise removal apparatus and an FM receiver Noise removal apparatus and an FM receiver

2006-01-31

2006-01-31

Tsang, Fan (Department: 2645)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S063100, C381S094100

Reexamination Certificate

active

06993309

ABSTRACT:
A noise removal unit mounted on a car radio according to the invention removes multipath noise and pulse noise from FM demodulated signals. At this time, the noise removal unit removes all of the multipath noise. Also, in case where the generation density of noise is high, the noise removal unit reduces the detection sensitivity so as not to detect pulse noise, particularly of small level, as noise. Comparing to multipath noise, pulse noise is noise rendering a large correction error than multipath noise. Therefore, in case where the generation density of pulse noise is high, by adapting the unit not to remove pulse noise of small level, it is made possible to reduce distortion of the FM demodulated signals to a minimum. Accordingly, it is made to reduce deterioration of the quality of FM voices to a minimum.

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patent: 11088207 (1999-03-01), None

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