Patents:

Auditory Display of Knee Sound Signals. Patent filed in US (Ref# 09/706976) and Canada (Ref# 2,235,236), 2000.

Audio Coding Algorithm. Patent to be filed in US and Canada.

Scientific Magazines:

Journal Publications:

J. C. Bejar and S. Krishnan, Speech signal enhancement by using time-frequency decompositions, under review, EURASIP Journal of Applied Signal Processing, Oct 2001.

S. Krishnan, R.M. Rangayyan, G.D. Bell and C.B. Frank, Auditory display of knee-joint vibration signals, in press, Journal of the Acoustical Society of America, pp 3292-3304, Vol. 110, Dec 2001.

R.M. Rangayyan and S. Krishnan, Feature identification in the time-frequency plane by using the Hough-Radon transform, Pattern Recognition, pp 1147-1158, Vol. 34, May 2001.

S. Krishnan, R.M. Rangayyan, G.D. Bell, and C.B. Bell, Adaptive time-frequency analysis of knee joint vibroarthrographic signals for non-invasive diagnosis of articular cartilage pathology, IEEE Transactions on Biomedical Engineering, pp 773-783, Vol. 47, No.6, June 2000.

S. Krishnan and R.M. Rangayyan, Automatic denoising of knee joint vibration signals using adaptive time-frequency representations, Medical and Biological Engineering and Computing, pp 2-8, Vol. 38, No.1, January 2000.

S. Krishnan, R.M. Rangayyan, G.D. Bell, C.B. Frank, and K.O. Ladly, Adaptive Filtering, Modelling, and Classification of Knee Joint Vibroarthrographic Signals for Non-invasive Diagnosis of Articular Cartilage Pathology, Medical and Biological Engineering and Computing, pp 677-684, Vol. 35, No.6, Nov. 1997.

R.M. Rangayyan, S. Krishnan, G.D. Bell, C.B. Frank, and K.O. Ladly, Parametric Representation and Screening of Knee Joint Vibroarthrographic Signals, IEEE Transactions on Biomedical Engineering, pp 1068-1074, Vol. 44, No. 11, Nov 1997.

Conference Publications:

K. Umapathy, S. Krishnan, V. Parsa and D. G. Jamieson, Discrimination of pathological voices using an adaptive time-frequency approach, accepted, International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Orlando, Florida, USA, May 2002.

S. Erkucuk and S. Krishnan, Interference excision in spread spectrum communications using adaptive positive time frequency distributions, accepted, International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Orlando, Florida, USA, May 2002.

S. Thayilchira and S. Krishnan, Detection of linear and non-linear chirps in spread spectrum signals using Hough-Radon transform, accepted, International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Orlando, Florida, USA, May 2002.

<> S. Krishnan , R.M. Rangayyan and K. Umapathy, A time-frequency approach for auditory display of time-varying signals, in Proc. IASTED International Conference on Signal and Image Processing, pp 236-241, Hawaii, USA, August 2001.

K. Umapathy and S. Krishnan , Low bit-rate time-frequency coding of wideband audio signals, in Proc. IASTED International Conference on Signal Processing, Pattern Recognition and Applications, pp 101-105, Rhodes, Greece, July 2001.

K. Umapathy and S. Krishnan , Joint time-frequency coding of audio signals, in Proc. 5th WSES/IEEE Multiconference on Circuits, Systems, Communications, and Computers, pp 32-36, Crete, Greece, July 2001.

K. Umapathy and S. Krishnan , Efficient compression of wideband audio signals using time-frequency functions, in Proc. Annual Micronet Workshop, Aylmer, Quebec, April 2001.

S. Krishnan , Instantaneous mean frequency estimation using adaptive time-frequency distributions, in Proc. IEEE Canadian Conference on Electrical and Computer Engineering, pp 141-146, Toronto, ON, May 2001.

M. Al-Saiegh and S. Krishnan , Fixed block-based lossless compression of digital mammograms, in Proc. IEEE Canadian Conference on Electrical and Computer Engineering, pp 937-942, Toronto, ON, May 2001.

S. Krishnan , R.M. Rangayyan, G.D. Bell, and C.B. Frank, Sonification of knee joint vibration signals, in CDROM Proc. {\em World Congress on Medical Physics and Biomedical Engineering (also 22nd Annual Intl. Conf. of The IEEE Eng. Med. Biol. Soc.}, pp 1995-1998, Chicago, July 2000.

S. Krishnan and R.M. Rangayyan, Knee joint vibration signal analysis using adaptive time-frequency distributions, Proc. European Medical and Biological Engineering Conference, pp 466-467, Vienna, Austria, Nov. 1999.

R.M. Rangayyan, S. Krishnan , G.D. Bell, and C.B. Frank, Computer-aided auscultation of knee joint vibration signals, Proc. European Medical and Biological Engineering Conference, pp 464-465, Vienna, Austria, Nov. 1999.

S. Krishnan and R.M. Rangayyan, Feature identification in the time-frequency distributions of knee joint vibroarthrographic signals using Hough and Radon transforms, Proc. International Conference on Robotics, Vision, and Parallel Processing, pp 82-89, Tronoh, Malaysia, July 1999.

S. Krishnan and R.M. Rangayyan, Denoising knee joint vibroarthrographic signals using adaptive time-frequency representations, Proc. Canadian Conference on Electrical and Computer Engineering, pp 1405-1411, Edmonton, AB, Canada, May 1999.

S. Krishnan and R.M. Rangayyan, Detection of Nonlinear Frequency Modulated Components by using an Array of Accumulators, Proc. IEEE International Symposium on Time-frequency and Time-scale Analysis, Pittsburgh, pp 557-560, PA, Oct 1998

R.M. Rangayyan and S. Krishnan , Comparative Analysis of the Performance of Time-Frequency Distributions with Knee Joint Vibroarthrographic, Proc. IEEE International Symposium on Time-frequency and Time-scale Analysis, pp 273-276, Pittsburgh, PA, Oct 1998.

S. Krishnan , R.M. Rangayyan, G.D. Bell, and C.B. Frank, Time-Frequency Signal Feature Extraction and Screening of Knee Joint Vibroarthrographic Signals using the Matching Pursuit Method, CDROM proceedings, 19th Annual Conference of the IEEE-EMBS, Chicago, IL, Oct 1997.

S. Krishnan and B.R. Petersen, Spatial-Temporal Decorrelating Decision Feedback Multiuser Detector for Synchronous Code-Division Multiple-Access Channels, pp 22-27, Proc. IEEE Pacific Rim (PACRIM) Conference on Communications, Computers, and Signal Processing, Victoria, BC, Aug 1997.

S. Krishnan and R.M. Rangayyan, Detection of Chirps and Other Features in the Time-Frequency Plane using Hough and Radon Transforms, pp 138-141, Proc. IEEE Pacific Rim (PACRIM) Conference on Communications, Computers, and Signal Processing, Victoria, BC, Aug 1997.

S. Krishnan, R.M. Rangayyan, G.D. Bell, C.B. Frank, and K.O. Ladly, Screening of Knee Joint Vibroarthrographic Signals by Statistical Analysis of Dominant Poles, in CDROM Proc., IEEE-EMBS Annual Conference, Amsterdam, The Netherlands, Oct 1996.

S. Krishnan, R.M. Rangayyan, C.B. Frank, G.D. Bell, and K.O. Ladly, Adaptive Segmentation and Cepstral Analysis of Vibroarthrographic Signals for Non-invasive Diagnosis of Knee Joint Cartilage Pathology, pp 8-9, Proc. 22nd Canadian Medical and Biological Engineering Conference, Charlottetown, PEI, Canada, June 1996.

R.M. Rangayyan, S. Krishnan, G.D. Bell, C.B. Frank, and K.O. Ladly, Impact of Muscle Contraction Interference Cancellation on Vibroarthrographic Screening, pp 16-19, Proc. International Conference on Biomedical Engineering, Kowloon, Hong Kong, June 1996. (Invited paper)

S. Krishnan, R.M. Rangayyan, G.D. Bell, C.B. Frank, and K.O. Ladly, Recursive Least-Squares Lattice-based Adaptive Segmentation and Autoregressive Modeling of Vibroarthrographic Signals," pp 339-342, Proc. Canadian Conference on Electrical and Computer Engineering, Calgary, AB, Canada, May 1996.

N. Kumaravel and S. Krishnan, "Knowledge based Biosignal Processing System for diagnosing heart disorders," pp 602-609, Proc. International Conference on Robotics, Vision and Parallel Processing, Ipoh, Malaysia, May 1994.

S. Krishnan, "An Expert Diagnostic System using Signal Processing Tool," 2nd International Conference on Expert Systems for Development, Bangkok, Thailand, March 1994.