• Speech and Audio Signal Processing
• Music Information Retrieval
• Coding of speech at low bit-rates

For more information: Digital Audio Processing Lab

• EE210 Signals and Systems
• EE338 Digital Signal Processing
• EE679 Speech Processing
• EE443 Digital Signal Processing Lab.

• B.Tech. (Electrical Engineering) IIT-Bombay,1984
• M.S. (Electrical Engineering) University of Florida, 1987
• Ph.D. (Electrical Engineering) University of Florida, 1990

• Professor, Dept of Electrical Engg., IIT–Bombay, January 2008 onwards
• Associate Professor, Dept of Electrical Engg., IIT–Bombay, 2001-2007
• Visiting Research Professor, School of Computing, N.U.S., Singapore, May-June 2015
• Senior Research Engineer, A.C.R.E., IIT–Bombay, from Oct 1999 to Jan 2001
• Visiting Researcher, Speech Group, IPO, Center for User-System Interaction, Eindhoven, the Netherlands, April 1999 to Sep 1999
• Assistant Professor, Dept of Electrical Engg. IIT–Kanpur, from Jan 1994 to April 1999
• Visiting Researcher, Central Research Laboratory, Speech Communications Group, Hitachi Ltd., Tokyo, Dec 1992 to Dec 1993
• Postdoctoral Research Associate, Dept of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Sep. 1990 – Aug 1992

Sponsored Research Projects

• D.T.S.R., Speech Enhancement and Coding at Low Bit-rates, 2000-2001 (Rs 90K)
• Sasken Communication Technologies, India, Pvt Ltd, MPEG-2 Audio Layer 3 Codec, IIT Kanpur, 1997-1998.
• Sasken Communication Technologies, India, Pvt Ltd, MPEG-4 Structured Audio Coding, 2000-2001.
• D.R.D.O., Applying Auditory Perception to Speech Enhancement and Coding, 2002-2004 (Rs 750K)

Consultancy Projects

• Central Research Lab.,Bharat Electronics Ltd, Low-rate Speech Coding Based on Multiband Excitation, 1998-1999, 2000-present.
• Central Research Lab., Bharat Electronics Ltd, Enhancement of Speech in Broadband Noise, 2001-2002.
• Central Research Lab., Bharat Electronics Ltd, DSP Implementation of the Low-rate MBE Speech Codec, 2002-2003.
• Centre for Artificial Intelligence Research (DRDO), Fixed-point implementation of low bit rate speech coding algorithm, 2005-2006.
• Nokia Research Bangalore, Spatial Audio Rendering, 2008-2009

Technologies/Products Developed

• A low bit rate (1.5 kbps) speech codec: algorithm has been developed, C-source code verified, and a DSP implementation is underway. A patent has been filed for a new algorithmic technique related to efficient parameter quantization.
  Patent filed: “Method and Apparatus for the Encoding and Decoding of Speech at Bit rates below 2 kbps”, March 2003, Indian Patent Office, Mumbai.

Department of Electrical Engineering
IIT Bombay, Powai
Mumbai 400 076, India
Email : prao[AT]ee.iitb.ac.in
Phone (Internal(O)) : (0091 22) - 2576 7695
Phone (Internal(R)) : 8695
Office room no: 232A
Fax: (0091 22) - 25723707

For more information, please visit Digital Audio Processing Lab