Patent ID: 8463607
Filing Date: 2013-06-11
Classification: G10K,G10L

Abstract:
1. A noise detection apparatus, comprising: a time-frequency transform unit configured to transform an input signal from a time domain to a frequency domain to produce a spectrum; a power spectrum calculating unit configured to obtain powers of frequencies from the spectrum; a peak stationarity detecting unit configured to use peaks of the powers of frequencies in each frame to detect frequencies at which a stationary peak of the powers exists; a power stationarity detecting unit configured to use magnitudes of the powers of frequencies in each frame to detect frequencies at which the magnitudes of the powers are stationary; and a check unit configured to use the frequencies detected by the peak stationarity detecting unit and the frequencies detected by the power stationarity detecting unit to check whether there is a noise that has at least one of peak stationarity and power stationarity in the frequency domain by checking whether a total number of the frequencies having at least one of peak stationarity and power stationarity in the frequency domain exceeds a predetermined number.