Patent application number | Description | Published |
20110123045 | NOISE SUPPRESSOR - A noise suppressor selects, for individual frequency components, maximums by comparing a plurality of noise suppressed spectra | 05-26-2011 |
20110125490 | NOISE SUPPRESSOR AND VOICE DECODER - A processed component calculating unit | 05-26-2011 |
20110286605 | NOISE SUPPRESSOR - A voice/noise section decision unit | 11-24-2011 |
20120209611 | SPEECH SIGNAL RESTORATION DEVICE AND SPEECH SIGNAL RESTORATION METHOD - A synthesis filter | 08-16-2012 |
20130003987 | NOISE SUPPRESSION DEVICE - A band separating unit | 01-03-2013 |
20130138434 | NOISE SUPPRESSION DEVICE - A noise suppression device includes: a power spectrum calculator converting an input signal of time domain into power spectra of frequency domain; a voice/noise determination unit determining whether the power spectra indicate voice or noise; a noise spectrum estimation unit estimating noise spectra of the power spectra; a period component estimation unit analyzing a harmonic structure constituting the power spectra and estimating periodical information about the power spectra; a weighting coefficient calculator calculating a weighting coefficient for weighting the power spectra; a suppression coefficient calculator calculating a suppression coefficient for suppressing noise included in the power spectra; a spectrum suppression unit suppressing amplitude of the power spectra in accordance with the suppression coefficient; and an inverse Fourier transformer converting the power spectra output by the spectrum suppression unit into a signal of time domain to generate a noise-suppressed signal. | 05-30-2013 |
20130216058 | NOISE SUPPRESSION DEVICE - A correction spectrum calculation unit | 08-22-2013 |
20140098968 | NOISE SUPPRESSION DEVICE - Disclosed is a noise suppression device including an input signal analyzer | 04-10-2014 |
20140207443 | AUDIO SIGNAL RESTORATION DEVICE AND AUDIO SIGNAL RESTORATION METHOD - A sound source generating unit | 07-24-2014 |
20140316775 | NOISE SUPPRESSION DEVICE - A probability density function controller determines a probability density function dependent upon whether an input signal appears to be a sound or noise, i.e., a probability density function that is suited to a distribution state of a sound signal in a sound section and that in a noise section, and a suppression amount calculator 8 calculates a spectrum suppression amount by using the probability density function. | 10-23-2014 |