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This paper deals with the problem of speech enhancement in near field condition, when two microphones are available. Proposed technique relies on the difference in power of received signals at the two microphones. This difference is employed to estimate the clean speech signal power. The method has the capability of dealing with non-stationary noise, a drawback of many noise reduction techniques....
In this paper, we propose a real-time architecture for a dual-microphone speech enhancement to be employed in a hands-free mobile communication. The proposed method is based on a new SNR estimation and a coherence based Voice Activity Detector (VAD). The enhancement system was implemented using MATLAB tools and DSP processors. The results show that these two implementations are comparable in terms...
A dual channel speech enhancement technique for hands-free applications is presented. The proposed method is based on the difference between the powers of two received signals in near-field condition. The subtraction of power spectral densities of noisy signals at two microphones is employed as a criterion for noise reduction. Obtained results show the capability of the proposed method in various...
Among various enhancement methods, dual microphone methods are utilized for their low cost implementation and use of spatial noise reduction. In this paper, we present a double microphone noise reduction method for nearby microphones. Our method is based on a modified coherence based filter which reduces correlated noises using cross spectral subtraction. In our proposed method the amount of noise...
In this paper we present a novel technique which localizes sound source with acceptable accuracy and low time complexity. In this technique, contrary to former localization techniques in 3-D space, only three microphones are sufficient. Instead of searching the entire space domain for the sound source, we first estimate an approximate point of the sound source according to the time delays and the...
In some telephony headsets the microphone is not close enough to the speaker's mouth due to size limitation. Thus the microphone captures background noise in addition to useful speech. There is a need to enhance the received signal in order to improve the voice quality in these systems. Among various enhancement methods, dual microphone methods are important for their low cost implementation and use...
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