Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Reexamination Certificate
2007-03-15
2011-11-01
Pham, Tuan (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
C455S063100, C455S570000, C455S222000, C379S406100, C379S406010
Reexamination Certificate
active
08050646
ABSTRACT:
To provide a noise suppressing device which accurately suppresses weak electric field strength pulse noise.A band-limiting unit (5) band-limits a composite signal obtained by demodulating an FM baseband signal, to a frequency band equal to or lower than a predetermined frequency so as to output a monaural audio signal. A pulse detecting unit (62) which detects pulse noise in the audio signal outputted by the band-limiting unit (5). A pulse judging unit (63) judges that a detection result of the pulse detecting unit (62) is valid in the case where pulse noise is detected in the composite signal, at a position corresponding to the detected pulse noise. A pulse suppressing unit (64) suppresses the pulse noise detected in the audio signal, in the case where the pulse judging unit (63) judges that the detection result is valid. Specifically, the amplitude of the composite signal which is synchronized with the audio signal is compared with a threshold, and it is judged that the detection result is pulse noise in the case where the amplitude of the composite signal exceeds the threshold.
REFERENCES:
patent: 7366491 (2008-04-01), Suzuki et al.
patent: 2004/0190656 (2004-09-01), Taira
patent: 2005/0058296 (2005-03-01), Karasudani
patent: 7-30448 (1995-01-01), None
patent: 8-163065 (1996-06-01), None
patent: 2000-101459 (2000-04-01), None
patent: 3213495 (2001-07-01), None
patent: 2004-363694 (2004-12-01), None
International Search Report issued Jun. 5, 2007 in the International (PCT) Application of which the present application is the U.S. National Stage.
Panasonic Corporation
Pham Tuan
Wenderoth , Lind & Ponack, L.L.P.
LandOfFree
Noise suppressing device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Noise suppressing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise suppressing device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4304668