117,643 research outputs found

    Noise-robust detection of peak-clipping in decoded speech

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    Estimation of glottal closure instants in voiced speech using the DYPSA algorithm

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    Study of Histamine Forming Bacteria in Commercial fish samples of Kalyan city

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    Histamine food poisoning is found to be associated with consumption of scombroid fish containing unusually high levels of histamine. Fish belonging to non-scombroid group may also cause histamine poisoning. In this study, histamine forming bacteria in the commercial fish samples of local markets of Kalyan region were investigated. Among 54 isolates 24 were found to be prominent histamine producers. A simple and rapid colorimetric method for the quantification of histamine in fish was used. Histamine level in fresh mackerel samples was found to be around 20 mg/100 g, which was much above the defect action level (5 mg/100 g) given by FDA indicating potential risk for histamine poisoning. The study suggest that practice of more hygienic and sanitary conditions during handling and processing of fish are required to minimize the contamination of such histamine producing bacteri

    Bearing-only acoustic tracking of moving speakers for robot audition

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    This paper focuses on speaker tracking in robot audition for human-robot interaction. Using only acoustic signals, speaker tracking in enclosed spaces is subject to missing detections and spurious clutter measurements due to speech inactivity, reverberation and interference. Furthermore, many acoustic localization approaches estimate speaker direction, hence providing bearing-only measurements without range information. This paper presents a probability hypothesis density (PHD) tracker that augments the bearing-only speaker directions of arrival with a cloud of range hypotheses at speaker initiation and propagates the random variates through time. Furthermore, due to their formulation PHD filters explicitly model, and hence provide robustness against, clutter and missing detections. The approach is verified using experimental results
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