Research



 

Speech enhancement  (current projects)

o       Development of MMSE algorithms for speech enhancement.

o       Development of noise estimation algorithms suitable for highly non-stationary noisy conditions

o       Development of subspace algorithms for non-stationary environments

o       Active noise control for fMRI scanner rooms
                       

[Research supported in part by NIH and done  in collaboration with University of Texas Southwestern Medical center (UTSW)]

Speech Compression  (past projects)

o        Real-time implementation of speech compression algorithms, including VSELP which has been adopted as the North American digital cellular standard, and GSM, the European speech coding standard.

o       Design and implementation of vector quantization algorithms for speech coding 

            Speech Recognition (past projects)

o       Development of preprocessing algorithms for digit recognition. Preprocessing algorithms were run real-time on a fixed-point processor. 

o       Development of alphabet recognition algorithms for name retrieval applications using context-dependent Hidden Markov Models.