Speech Enhancement: Algorithm and Architecture - Softcover

Sinha, Pavel

Softcover

ISBN 10: 3639098374 ISBN 13: 9783639098372

Publisher: VDM Verlag Dr. Mueller E.K., 2008

Synopsis

This thesis presents algorithm and architecture for simultaneous diagonalization of matrices. As an example, a subspace-based speech enhancement problem is considered, where in the covariance matrices of the speech and noise are diagonalized simultaneously. In order to compare the system performance of the proposed algorithm, objective measurements of speech enhancement is shown in terms of the signal to noise ratio and mean bark spectral distortion at various noise levels. In addition, an innovative subband analysis technique for subspace-based time-domain constrained speech enhancement technique is proposed. The proposed technique analyses the signal in its subbands to build accurate estimates of the covariance matrices of speech and noise, exploiting the inherent low varying characteristics of speech and noise signals in narrow bands. The subband approach also decreases the computation time by reducing the order of the matrices to be simultaneously diagonalized. Further, architecture is proposed to implement the simultaneous diagonalization scheme. The architecture is implemented on a Xilinx FPGA. FPGA resource utilization re-enforces on the practicability of the design.

Edition details

• Publisher: VDM Verlag Dr. Mueller E.K.
• Publication date: 2008
• Language: English
• ISBN 10: 3639098374
• ISBN 13: 9783639098372
• Binding: Paperback
• Number of pages: 152