ELECTRICAL & COMPUTER ENGINEERING DEPARTMENT

CLEMSON UNIVERSITY

DR. JOHN N. GOWDY

INDEX

1. PUBLICATIONS ON SPEECH PROCESSING
2. PUBLICATIONS ON OTHER DIGITAL SIGNAL PROCESSING TOPICS
3. SPEECH PROCESSING LAB
4. FORMER GRADUATES AND AREAS OF GRADUATE RESEARCH
5. SENIOR HONORS THESIS ADVISEES

PUBLICATIONS ON SPEECH PROCESSING

• Raghunandan Kumaran, Karthik Narayanan, John Gowdy, "Myoelectric Signals for Multimodal Speech Recognition", INTERPEECH (Eurospeech) 2005, Lisboa, Portugal, September 2005 .
• Raghunandan Kumaran, Karthik Narayanan, John Gowdy, " Language Modeling Using Independent Component Analysis For Automatic Speech Recognition", Eurpoean Signal Processing Conference, EUSIPCO 2005, Antalya, Turkey.
• S. Amarnag, Gowdy J.N., C. Bartels and J. Bilmes, "DBN based Multi-Stream Models for Audio-Visual Speech Recognition", To Appear in Proceeding of IEEE International Conference on Acoustics, Speech and Signal Processing, Montreal, 2004.
• S. Amarnag, R. Kumaran., and Gowdy, J. N., "Real Time Eye Traking for Human Computer Interfaces", Proceedings of the IEEE International Conferance on Multimedia and Expo, Baltimore, July 2003.
• Patterson, E. K., Gurbuz, S., Tufekci, Z., and Gowdy, J. N., "Moving-Talker, Speaker-Independent Feature Study and Baseline Results Using the CUAVE Multimodal Speech Corpus," accepted for publication by the EURASIP Journal on Applied Signal Processing. To Appear in 2003.
• E.K. Patterson, S. Gurbuz, Z. Tufekci, and J.N. Gowdy, "CUAVE: A New Audio-Visual Database for Multimodal Human-Computer Interface Research," Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, Orlando, May 2002.
• S. Gurbuz, E. K. Patterson, Z. Tufekci and Gowdy, J.N., "Multi-Stream Product Modal Audio-Visual Integration Strategy for Robust Adaptive Speech Recognition", IEEE International Conference on Acoustics, Speech and Signal Processing, Orlando, May 2002.
• Gurbuz, S., Tufekci, Z., Patterson, E. K., and Gowdy, J. N., "Application of Affine-Invariant Fourier Descriptors to Lipreading for Audio-Visual Speech Recognition," Proceedings of the International Conference on Acoustics, Speech, and Signal Processing, Salt Lake City, May 2001.
• S. Gurbuz, Patterson, E. K., Tufekci, Z., and Gowdy, J. N., "Affine-Invariant Visual Features Contain Supplementary Information to Enhance Speech Recognition," Proceedings of the International Conference on Audio-and-Video-Based Biometric Person Authentication, Sweden, 2001.
• Patterson, E. K., Gurbuz, S., Tufekci, Z., and Gowdy, J. N., "Noise-Based Audio-Visual Fusion for Robust Speech Recognition," Proceedings of the International Conference on Auditory-Visual Speech Processing, Scheelsminde, Denmark, September 2001.
• Tufekci, Z., Gowdy, J. N., Gurbuz, S., and Patterson, E. K., "Applying Parallel Model Combination with Mel-Scaled Discrete Wavelet Coefficients for Noise-Robust Speech Recognition," Proceedings of Eurospeech 2001, Aalborg, Denmark, September 2001.
• Gurbuz, S., Patterson, E. K., Tufekci, Z., and Gowdy, J. N., "Lip-Reading from Parametric Lip Contours for Audio-Visual Speech Recognition," Proceedings of Eurospeech 2001, Aalborg, Denmark, September 2001.
• Gowdy, J. N., and Tufekci, Z., "Mel-Scaled Discrete Wavelet Coefficients for Speech Recognition," Proceedings of the 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing, Istanbul, Turkey, (June 2000).
• Patterson, E. K., Gowdy, J. N., and Wu, D.,"Multi-Platform CBI Tools Using Linux and Java-Based Solutions for Distance Learning," Proceedings of the International Conference on Acoustics, Speech, and Signal Processing, Seattle, May 1998.
• Scordilis, M.S. and Gowdy, J. N., "A Neural Network-based Control Strategy or a Speech Formant Synthesizer," Journal of Artificial Neural Networks, to appear in early 1995.
• Wu, Duanpei, and Gowdy, J. N., "Tunable Time Delay Neural Networks for Isolated Word Recognition," Proceedings of the 1994 International Symposium on Speech, Image Processing, and Neural Networks, Hong Kong, April, 1994
• Bryant, Benjamin D. and Gowdy, J. N., "A Comparison of Feature Representations for Speaker-Independent Voiced-Stop-Consonant Recognition," Proceedings of the 1993 IEEE Southeastcon, Charlotte, NC, April 1993.
• Wu, Duanpei and Gowdy, J. N., "Time-Frequency-Energy Representation Based Real-Time Based Speech Recognition," Proceedings of the 1993 IEEE Southeastcon, Charlotte, NC, April 1993.
• Berger, G. L. and Gowdy, J. N., "TDNN Based Speaker Identification," Proceedings of the Twenty-Fifth Southeastern Symposium on System Theory, Tuscaloosa, Alabama, March 1993.
• Bryant, B. D. and Gowdy, J. N., "Speaker-Independent Voiced-Stop-Consonent Recognition Using a Block-Windowed Neural Network Architecture," Proceedings of the Twenty-Fifth Southeastern Symposium on System Theory, Tuscaloosa, Alabama, March 1993.
• Bryant, Benjamin D. and Gowdy, J. N., "Simulation of Stages I and II of Seneff's Auditory Model (SAM) using MATLAB," Proceedings of the National Matlab Conference, Boston, MA, October 1993.
• Easwaran, S. and Gowdy, J. N., " An Improved Algorithm for Use with the K-Means Algorithm for Codebook Generation," Proceedings of the 1992 IEEE Southeastcon, Birmingham, AL, April 1992.
• Neelakantan, V., and Gowdy, J. N., "A Comparative Study of Using Different Speech Parameters in the Design of a Discrete Hidden Markov Model, Proceedings of the 1992 IEEE Southeastcon, Birmingham, AL, April 1992.
• Weber, A. C. and Gowdy, J. N. "Design and Simulation of a Speaker Recognition System, Proceedings of the 1991 Southeastern Symposium on System Theory, Columbia, SC, April 1991.
• Scordilis, M. J., and Gowdy, J. N., "Speech Synthesis of Phonemic Triplets Through a Neural Network-Controlled Formant Synthesizer," Proceedings of the International Joint Conference on Neural Networks 1991, Seattle, WA, July 1991.
• Scordilis, M. J., and Gowdy, J. N. "Neural Network Control for a Cascade/Parallel Formant Synthesizer", Proceedings of the 1990 IEEE International Conference on Acoustics, Speech, and Signal Processing, Albuquerque, NM, April 1990.
• Neelakantan, N. and Gowdy, J. N., "A Study of the HMM for Speaker- Independent Isolated Word Recognition," Proceedings of the 1990 Southeastcon, New Orleans, LA, March 1990.
• Kepuska, V. Z. and Gowdy, J. N., "On the Effect of Topological Structure of the Kohonen Network on the Performance of a Hierarchical Two Layered Isolated Word Recognition System," Proceedings of the 1990 Southeastcon, New Orleans, LA, March 1990.
• Scordilis, M. S. and Gowdy, J. N., "Effects of the Vocal Tract Shape on the Spectral Tilt of the Glottal Pulse Waveform," Proceedings of the 1990 Southeastcon, New Orleans, LA, March 1990.
• Kepuska, V.Z. and Gowdy, J. N., "Investigation of Phonemic Context in Speech Using Self-Organizing Maps," Proceedings of the 1989 IEEE International Conference on Acoustics, Speech, and Signal Processing, Glasgow, Scotland, May 1989.
• Scordilis, M. J., and Gowdy, J. N. "Neural Network Generation of Fundamental Frequency Contours", Proceedings of the 1989 IEEE International Conference on Acoustics, Speech, and Signal Processing, Glasgow, Scotland, May 1989.
• Scordilis, M. S. and Gowdy, J. N., "Text Processing for Speech Synthesis Using Parallel Distributed Models," Proceedings of the 1989 Southeastcon, Columbia, SC, April 1989.
• Kepuska, V. Z. and Gowdy, J. N., "Phonemic Speech Recognition System Based on a Neural Network," Proceedings of the 1989 Southeastcon, Columbia, SC, April 1989.
• Ward, R. M. and Gowdy, J. N., "An Investigation of Speaker Verification Accuracy Using Fundamental Frequency and Duration as Distinguishing Features," Proceedings of the 21st Southeastern Symposium on System Theory, Tallahassee, Florida, March 1989.
• Sethuraman, R. and Gowdy, J. N., "A Cepstral Based Speaker Recognition System," Proceedings of the 21st Southeastern Symposium on System Theory, Tallahassee, Florida, March 1989.
• Kepuska, V. Z., Easwaran, S., and Gowdy, J. N., "Evaluation of Digital Signal Processing Chips for Speech Processing Applications," Proceedings of the l987 Southeastern Symposium on System Theory, Clemson, SC, March 1987.
• Gowdy, J. N., "Voice I/O for the Personal Computer," Final Report, NCR Contract, June l986.
• Scordilis, M. S., and Gowdy, J. N., "Comparison of Computerized Speech Synthesis Techniques," Proceedings of the 1986 IEEE Southeastcon, Richmond, VA, March 1986.
• Vogel, K. R. and J. N. Gowdy, "Microprocessor Implementation of a Near Real-Time Speech Recognition System," Proceedings of the l984 IEEE Southeastcon, Louisville, KY, April l984.
• Rochester, L. R., Gowdy, J. N., and Bryan, J. K., "Comparison of Speech Recognition Systems Based on FFT's and Zero-Crossings," Proceedings of the l979 Southeastcon, Roanoke, VA, April l979.
• Gupta, V. N., Bryan, J. K., and Gowdy, J. N., "Speaker-Independent Vowel Identification in Continuous Speech," Proceedings of the l978 IEEE International Conference on Acoustics, Speech, and Signal Processing, Tulsa, OK, April l978.
• Gupta, V. N., Bryan, J. K., and Gowdy, J. N., "A Speaker-Independent Speech-Recognition System Based on Linear Prediction," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-26, no. 1, February l978.
• Gupta, V. N., Gowdy, J. N., and Bryan, J. K., "Evaluation of Some Distance Measures for Speaker-Independent Isolated Word Recognition," Proceedings of the l977 IEEE International Conference on Acoustics, Speech, and Signal Processing, Hartford, CT, May l977.
• Gupta, V. N., Bryan, J. K., and Gowdy, J. N., "Application of a Combined Nearest-Neighbor and K-Nearest-Neighbor Rule in a Speech Recognition System," Proceedings of the l977 Southeastcon, Williamsburg, VA, April l977.
• Thaker, G. H., and Gowdy, J. N., "Comparison of Fast Fourier and Walsh Transform Methods in Speech Recognition Systems," Proceedings of the l977 Southeastcon, Williamsburg, VA, April l977.
• Gupta, V. N., Gowdy, J. N., and Bryan, J. K., "Evaluation of Some Distance Measures for Computerized Speech Recognition," Proceedings of the l977 Southeastcon, Williamsburg, VA, April l977.
• Gowdy, J. N., and Hinson, J. R., "A Computerized Reading Evaluation System," Proceedings of the l976 Southeastcon, Clemson, SC, April l976.

  Back to index ...

PUBLICATIONS ON OTHER DIGITAL SIGNAL PROCESSING TOPICS

• Karthik Narayanan, Raghunandan Kumaran, John Gowdy, " Stereo Based Elliptical Head Tracking ", Eurpoean Signal Processing Conference, EUSIPCO 2005, Antalya, Turkey.
• Little, S. H., and Gowdy, J. N., "Evaluation of Computerized Digital Filter Design Techniques," Proceedings of the 1986 IEEE Southeastcon, Richmond, VA, March 1986.
• Brown, B. D., Gowdy, J. N., and Larson, V. D., "A System for the Acquisition and Analysis of EEG Signals Evoked by Audio Stimuli," Proceedings of the l985 IEEE Southeastcon, Raleigh, NC, April l985.
• McCourry, T. L. and J. N. Gowdy, "Comparison of Several Digital Filter Design Methods," Proceedings of the l984 IEEE Southeastcon, Louisville, KY, April l984.
• Queen, G. W., Bryan, J. K., and Gowdy, J. N., "Improved Technique for Image Data Compression, Proceedings of the l983 Southeastern Sympos- ium on System Theory, Huntsville, AL, March l983.
• Queen, G. W., Gowdy, J. N., and Bryan, J. K., "Efficient Implementation of the Karhunen-Loeve Transform for Processing Image Data, Using the Power Method for the Eigenvalues," Proceedings of the 1982 IEEE Southeastcon, Destin, FL, April l982.
• Queen, G. W., Bryan, J. K., and Gowdy, J. N., "Investigation of Several Discrete Transform Methods for Image Processing Applications, Proceedings of the 1981 IEEE Southeastcon, Huntsville, AL, April l981.
• Bell, D. M., and Gowdy, J. N., "Power Spectral Estimation via Nonlinear Frequency Warping," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-26, no. 5, October l978.
• Gaffney, B. P., and Gowdy, J. N., "An Algorithm to Evaluate the L=83 Norm for Some Common Filters," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-25, no. 2, April l977.
• Gaffney, B. P., and Gowdy, J. N., "Design of Implementation Configurations for Low Pass Chebyshev and Butterworth Digital Filters," Proceedings of the l975 Southeastcon, Charlotte, NC, April 1975.
• Brubaker, T. A., and Gowdy, J. N., "Computation of the Discrete Auto- covariance, "International Journal of Electronics, vol. 37, no. 4, Oct. l974.
• Gowdy, J. N., and Hadstate, J. E., "Design of Optimum Configurations of Digital Filters," Proceedings of the l973 Southeastcon, Louisville, KY, May l973.
• Brubaker, T. A., and Gowdy, J. N., "Limit Cycles in Digital Filters," IEEE Transactions on Automatic Control, vol. AC-17, no. 5, October l972.

  Back to index ...

SPEECH PROCESSING LAB IN E&CE DEPARTMENT

• KAY SONAGRAPH SYSTEM.
• LARYNGOGRAPH .
• SUN WORK STATIONS.
• SOUNDPROOF ISOLATION CHAMBER .
• SUN SPARC SYSTEMS

• Back to index ...

FORMER GRADUATES AND AREAS OF GRADUATE RESEARCH

Speech Recognition

Ph.D.

• Kepuska, V. Z.. "Neural Networks for Speech Recognition Applications," 1990.
• Easwaran, S., "Investigations on Discrete-Symbol HIdden-Markov Model Based Isolated-Word Speech Recognition," 1992.
• Neelakantan, V., "Hidden Markov Model-Based Speech Recognition," December 1993
• Tufekci Z., " Mel-Scaled Discrete Wavelet Coefficients for Noise-Robust Speech Recognition", December 2001
• Patterson Eric, "Audio Visual Speech Recognition", May 2002.
• Gurbuz S., "Robust and Efficient Parameters for Audio Visual Speech Recognition", August 2002.

M.S.

• Vogel, K. R., "Design and Implementation of a Speech Recognition System," May l984, MS.
• Christ, J. F., "Speech Recognition Using an Analog Microprocessor," December 1981, MS.
• Li, D. T.-P., "Speech Pattern Recognition," May 1981, MS.
• Thaker, G. H., "Comparison of Fourier and Walsh Transforms in Speech Recognition," August l977, MS.
• Hinson, J. R., "Implementation of a Computerized Reading Evaluation System," August l974, MS.

Speaker Recognition/Verification

M.S.

• Berger, Gary L., "Neural Network-Based Speaker Identification," December 1993, MS.
• Weber, Alene, (MS), "A Real-Time, Text-Independent Speaker Recognition System", 1990.
• Sethuraman, Radhakrishnan, "A Cepstral Based Speaker Recognition System," May 1989, MS.
• Ward, Robert, "An Investigation of Speaker Verification Accuracy Using Fundamental Frequency and Duration as Distinguishing Features," (Engineering Report), December 1988, MS.

Speech Synthesis

Ph.D.

• Scordilis, M., "A Neural Network Controlled Formant Synthesizer with Phoneme-Dependent Voicing, 1990.

M.S.

• Scordilis, M, "An Investigation into Digital Speech Synthesis," May l986, MS.

Other Digital Signal Processing Topics

Ph.D.

• Bell, D. M., "Digital Signal Processing for Textile Irregularity Analysis", 1978.
• Gaffney, B. P. M., "An Analysis of Roundoff Noise in Fixed Point Cascade Digital Filters Designed Using the Bilinear Transformation," 1976.

M.S.

• Hosangadi, Guradutt, "Digital Signal Processing for Textile Quality Measurement," May 1994, MS.
• Macemon, R. W., "Automatic Testing and Upgrading of Digital to Analog Converters," (Engineering Report), August l985, MENGR.
• Brown, B. D., "A System for the Acquisition and Analysis of the Frequency Following Response in Audiology Research," August 1984, MS.
• McCourry, T. L., "A Comparison of Digital Filter Design Techniques," December l983, MS.
• Lu, W.-P., "An 8086 Multiprocessor System for Digital Filtering Application," May l981, MS.
• Lo, R. S. B., "Comparison of Several Computer-Aided Design Techniques for Low-Pass Digital Filters," August 1977, MS.
• Tsai, S., "Analysis of Several Methods for Evaluating the Quantization Error Propagation Functions for Digital Filters," August l977, MS.
• Wood, R. J., "Textile Irregularity Analysis Using the Variance Length Curve with Real Time Digital Signal Processing," May l977, MS.
• Bell, D. M., "The Determination of the Variance-Length Curve for Textile Yarn Using a Real-Time Computer, May 1974, MS.

  Back to index ...

SENIOR HONORS THESIS ADVISEES

• Theobald, Brian, "Music and Speech Processing using the Motorola DSP56000 Digital Signal Processing Chip," May 1993.
• Bowyer, Stephen, "Speech Recognition Using the Siemens Speech Recognition Board," May 1994.
• Anderson, David L., "Development of a Digital Signal Processing Laboratory with Emphasis on Speech Signal Processing," May 1994.

  Back to index ...