Patent
Low complexity noise reduction method
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TLDR
In this article, a method of reducing noise in a speech signal using a fast Fourier transform (FFT) is proposed. But the method is not suitable for the frequency domain.Abstract:
A method of reducing noise in a speech signal involves converting the speech signal to the frequency domain using a fast fourier transform (FFT), creating a subset of selected spectral subbands, determining the appropriate gain for each subband, and interpolating the gains to match the number of FFT points. The converted speech signal is then filtered using the interpolated gains as filter coefficients, and an inverse FFT performed on the processed signal to recover the time domain output signal.read more
Citations
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TL;DR: In this article, a multi-sourced noise suppression system for the Internet of Things (IoT) is presented. But the system is not suitable for the use of speech recognition.
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Mark Every,David Klein +1 more
TL;DR: In this article, a method, system, and computer program for enhancing a signal are presented, where the signal is received, and energy estimates of the signal may be determined based on the energy estimates.
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TL;DR: In this paper, the authors proposed a method for generating clean speech from a speech signal representing a mixture of a noise and speech using a model of speech using auditory and speech production principles.
References
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Noise suppression based upon bark band weiner filtering and modified doblinger noise estimate
TL;DR: In this article, an input signal is converted to frequency domain by discrete Fourier analysis and divided into Bark bands, and a noise estimate is subtracted from the signal in each band.
PatentDOI
Method and apparatus for enhancing noise-corrupted speech
TL;DR: In this paper, a noise suppression device receives data representative of a noise-corrupted signal which contains a speech signal and a noise signal, divides the received data into data frames, and then passes the data frames through a pre-filter to remove a dc-component and the minimum phase aspect of the noise.
PatentDOI
System and process for locating a speaker using 360 degree sound source localization
TL;DR: In this article, a system and process for estimating the location of a speaker using signals output by a microphone array characterized by multiple pairs of audio sensors is described, and a consensus location for the speaker is computed from the individual location estimates associated with each pair of microphone array audio sensors taking into consideration the uncertainty of each estimate.
Patent
Method and apparatus for adaptively suppressing noise
TL;DR: In this paper, an apparatus and method for suppressing noise is presented, which utilizes a filter bank of bandpass filters to split the input noisy speech-containing signal into separate frequency bands.
Patent
Communication system tonal component maintenance techniques
TL;DR: In this paper, a joint voice activity and DTMF activity detector (JVADADAD) is used to determine whether the input signal contains speech, DTMFs tones or silence, and the power estimation processes are adapted based on the signal activity indicated by the JVADAD.