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Noise reduction is an important problem in hands-free speech capture. This paper discusses the use of a remote wireless microphone to aid the reduction of practical non-stationary noise signals. Such a microphone can be placed close to a noise source to provide a reliable estimate of the undesired signal, which can be used by a noise reduction algorithm. The signal from the remote microphone, however,...
In single-channel non-stationary noise reduction it is paramount that a good noise reference is available in a timely manner to maintain a high quality speech signal. Using a remote wireless microphone placed close to a noise source, a good estimate of the noise power spectral density (PSD) can be acquired. This estimate, however, needs to be transmitted to the primary microphone for noise reduction...
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