Noise reduction device, noise reduction method, and noise reduction program
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United States of America Patent
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Mar 6, 2018
Issued Date -
N/A
app pub date -
Aug 17, 2016
filing date -
Aug 31, 2015
priority date (Note) -
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Abstract
A frame generator 3 frames an input signal and generates a frame signal. A reference signal storage unit 7 stores therein a reference signal showing a periodic noise signal. A correlation value calculator 8 calculates a correlation value between the frame signal and the reference signal. A correlation candidate position decider 9 decides a plurality of correlation candidate positions serving as candidates for a signal portion of the reference signal correlated with the frame signal. A noise reduction processor 10 reduces a periodic noise signal, which is included in the frame signal, by using each signal portion of the plurality of correlation candidate positions, and generates a plurality of candidate output signals. An output signal decider 11 decides a candidate output signal, in which the periodic noise signal is reduced the most among the plurality of candidate output signals, and outputs the decided output signal.
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