Work place: Indian Institute of Technology Guwahati, Guwahati-781039, India
Research Interests: Speech Synthesis, Speech Recognition, Computer systems and computational processes
S. R. Mahadeva Prasanna was born in India in 1971. He received the B.E. degree in electronics engineering from Sri Siddartha Institute of Technology, Bangalore University, Bangalore, India, in 1994, the M.Tech. degree in industrial electronics from the National Institute of Technology, Surathkal, India, in 1997, and the Ph.D. degree in computer science and engineering from the Indian Institute of Technology Madras, Chennai, India, in 2004. He is currently a Professor in the Department of Electronics and Electrical Engineering, Indian Institute of Technology, Guwahati. His research interests are in speech and signal processing.
DOI: https://doi.org/10.5815/ijigsp.2018.06.05, Pub. Date: 8 Jun. 2018
This work focuses on text dependent speaker verification system where a source feature specifically residual Mel frequency cepstral coefficients (RMFCC), has been extracted in addition to a vocal tract system feature namely Mel frequency cepstral coefficients (MFCC). The RMFCC features are derived from the LP residuals whereas MFCC features are derived from the cepstral analysis of the speech signal. Thus, these two features have different information about the speaker. A four cohort speaker’s set has been prepared using these two features and dynamic time warping (DTW) is used as the classifier. Performance comparison of the text dependent speaker verification model using MFCC and RMFCC features are enumerated. Experimental results shows that, using RMFCC feature alone do not give satisfactory results in comparison to MFCC. Also, the system’s performance obtained using the MFCC features, is not optimum. So, to improve the performance of the system, these two features are combined together using different combination algorithms. The proposed lowest ranking method yields good performance with an equal error rate (EER) of 7.50%. To further improve the efficiency of the system, the proposed method is combined along with the strength voting and weighted ranking method in the hierarchical combination method to obtain an EER of 3.75%.[...] Read more.
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