Thippur V. Sreenivas

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Considering a general linear model of signal degradation, by model-ing the probability density function (PDF) of the clean signal using a Gaussian mixture model (GMM) and additive noise by a Gaus-sian PDF, we derive the minimum mean square error (MMSE) es-timator. The derived MMSE estimator is non-linear and the linear MMSE estimator is shown to be a(More)
Compressive sensing (CS) has been proposed for signals with spar-sity in a linear transform domain. We explore a signal dependent unknown linear transform, namely the impulse response matrix operating on a sparse excitation, as in the linear model of speech production , for recovering compressive sensed speech. Since the linear transform is signal dependent(More)
In this paper, we present a new speech enhancement approach , that is based on exploiting the intra-frame dependency of discrete cosine transform (DCT) domain coefficients. It can be noted that the existing enhancement techniques treat the transform domain coefficients independently. Instead of this traditional approach of independently processing the(More)
Speech and Audio processing techniques are used along with statistical pattern recognition principles to solve the problem of music instrument recognition. Non temporal, frame level features only are used so that the proposed system is scalable from the isolated notes to the solo instrumental phrases scenario without the need for temporal segmen-tation of(More)