 Kaliappan
Gopalan
Professor of Electrical Engineering
Address
Purdue University Calumet
Department of Engineering
Potter
229
2200 169th Street Hammond, IN 46323-2094
Phone:
219-989-2685
To send email: gopalan@calumet.purdue.edu
Education
 Ph.D. (Engineering),
1983
The University of Akron, Akron,
Ohio.
Dissertation Title: Fourier-Bessel Expansion: Numerical
Evaluation and Application in Representation and Feature Extraction
of Speech Signals.
M.Tech. (EE), 1974
Indian Institute of
Technology, Kanpur, India.
Thesis Title: A Pulse-Echo type Cable
Fault Locator.
B.E. (EE), 1971
P.S.G. College of
Technology (Univ. of Madras), Coimbatore, India.
Experience
Aug. 1985 to present - Professor of Electrical
Engineering, Department of Engineering, Purdue University Calumet,
Hammond, IN.
Summer 2005 – ASEE Summer Faculty
Fellowship Program participant, Rome Laboratory, Air Force Research
Laboratory, Rome, NY.
Summer 2002 – Visiting
Faculty Research Program participant, Rome Laboratory, Air Force
Research Laboratory, Rome, NY.
Summer
2001 – Consultant to Corporate Research and Development,
General Electric Company, Niskayuna, NY.
Summer
2000 – Visiting Faculty Research Program participant, Rome
Laboratory, Air Force Research Laboratory, Rome, NY.
Summer 1998 - Summer Faculty Research
Associate, Air Force Research Laboratory, Rome Research Site, Rome,
NY.
Summer 1996 - Summer Faculty Research
Associate, Rome Laboratory, Griffiss Air Force Base, Rome, NY.
Sep. 1987 to Dec. 1995 - Special Term
Appointee, Argonne National Laboratory, Argonne, IL.
Summer 1993 - Summer Faculty Research
Associate, Armstrong Laboratory, Wright-Patterson Air Force Base,
Dayton, OH.
Summer 1987 - Faculty
Research Participant, Argonne National Laboratory, Argonne,
IL.
Sep. 1983 to Aug. 1985 -
Assistant Professor, Department of Electrical Engineering, Lafayette
College, Easton, PA.
1979 to 1983 - Lecturer,
Teaching Assistant and Research Assistant, Electrical Engineering
Department, University of Akron, Akron, OH.
1975
to 1979 - Research Engineer, Equipment Development Cell,
Indian Institute of Technology, Kanpur, India.
1974 to 1975 - Assistant Engineer
(Instrumentation), Central Instrumentation Services, Indian
Institute of Technology, Kanpur, India.
Areas of Instruction
Signal Processing
Speech Processing
Communication
Electronics
Digital Systems
Research Interests
Speech Signal
Analysis
Digital Signal
Processing
Digital Systems
Sponsored Research
2008 - 2010: Keyword
Spotting, Air Force Research Laboratory, Rome, NY; $ 167,401
2006 Summer: Summer
Faculty Research Extension Grant for cepstral domain analysis of
speech to detect deception, Air Force Research Laboratory Rome,
NY; $ 10,000
2003-2004: Cepstral domain
data embedding in audio signals, Air Force Research Laboratory,
Rome, NY; $ 80,000
1999: Modulation
characteristics of speech under varying heart rates of speakers, Air
Force Office of Scientific Research; $ 25,000
1997: Analysis of the
acoustic correlates of speech under stressed conditions, Air Force
Office of Scientific Research; $ 25,000
Patents
U.S. patent No. 7,231,271
for, “Steganographic method for covert audio communications” –
June 12, 2007.
U.S. patent No.
7,035,700 for, “Method and apparatus for embedding data in audio
signals” – April 25, 2006.
U.S. patent
No. 7,555,432
for, "Audio steganography method and apparatus using cepstrum
modification" - June 30, 2009.
Textbooks
Introduction to Signal and System Analysis, October 2008
(© 2009), by Cengage Learning
Introduction to
Digital Microelectronic Circuits, January 1996, by Richard D.
Irwin (now McGraw-Hill), Chicago, IL. Paperback edition
published in 2002 by McGraw-Hill
Representative Publications
K. Gopalan, Tao Chu, and Xiaofeng Miao, "An
Utterance Recognition Technique for Keyword Spotting by Fusion of
Bark Energy and MFCC Features," Proc. of the 9th WSEAS
International Conference on Signal, Speech & Image Processing
(SSIP'09), Budapest, Hungary, September 2009.
K. Gopalan, “An
Image Steganography Implementation for JPEG-Compressed
Image,” Proc. of the IEEE 7th International Symposium on
Communications and Information Technologies (ISCIT2007), Sydney,
Australia, October, 2007.
K. Gopalan and S. Wenndt, “Speech
Analysis using Modulation-based Features for Detecting
Deception,” Proc. of the IEEE 15th International
Conference on Digital Signal Processing (DSP 2007), Cardiff,
Wales, July 2007.
K. Gopalan, “A
One-Dimensional Technique for Embedding Data in a JPEG Color
Image,” Proc. of the 2006 IEEE
Asia Pacific Conference
on Circuits and
Systems (APCCAS2006),
Singapore, December 2006.
K. Gopalan, “A
Technique for Imperceptible Embedding of Data in a Color
Image,” Proc. of the IEEE International Conference on
Informatics in Control, Automation and Robotics (ICINCO 2006),
Setúbal, Portugal, August 2006.
K. Gopalan, “A
Data Hiding Technique for JPEG Color Images By One-Dimensional
Spectrum Modification,” Proc. of the IEEE International
Symposium on Industrial Electronics (ISIE 2006), Montreal, Canada,
July 2006.
K. Gopalan, “Robust
Watermarking of Music Signals by Cepstrum Modification,”
Proc. of the IEEE 2005 International Symposium on Circuits and
Systems (ISCAS2005), Kobe, Japan, May 2005.
K. Gopalan “Audio
Steganography by Cepstrum Modification,” Proc. of the
IEEE 2005 International Conference on Acoustics, Speech, and
Signal Processing (ICASSP’05), Philadelphia, March 2005.
K. Gopalan and S. Wenndt, “Audio
Steganography for Covert Data Transmission by Imperceptible Tone
Insertion,” Proc. the IASTED
International Conference on
Communication Systems and
Applications (CSA 2004),
Banff, Canada, July,
2004.
K. Gopalan, “Cepstral Domain Modification of Audio Signals
for Data Embedding – Preliminary Results,” Proc. of the
Security and Watermarking of Multimedia Contents V Conference at
IS&T/SPIE Electronic Imaging 2004, Santa Clara, CA, Jan. 2004.
K. Gopalan, “Audio
Steganography Using Bit Modification,”
Proc. of the IEEE 2003 International Conference on Multimedia and
Exposition (ICME 2003), July 2003; also, Proc. of the IEEE 2003
International Conference on Acoustics, Speech, and Signal
Processing (ICASSP’03), Hong Kong, Apr., 2003.
K. Gopalan, S. Wenndt, S. Adams and D. Haddad, “Covert
Speech Communication Via Cover Speech By Tone Insertion,”
Proc. of the IEEE Aerospace Conference, Big Sky, MT, Mar. 2003.
K. Gopalan, “Speech
Coding using Fourier-Bessel Expansion of Speech Signals,”
IEEE Industrial Electronics Conference (IECON’01), Denver, CO,
Nov.-Dec. 2001.
K. Gopalan, “On
the Effect of Stress on Certain Modulation Parameters of
Speech,” Proc. of the 26th International Conference
on Acoustics, Speech, and Signal Processing (ICASSP 2001), Salt
Lake City, UT, May 2001.
K. Gopalan, D.S. Benincasa, and S.J. Wenndt, “Data
Embedding in Audio Signals,” Proc. of the 2001 IEEE
Aerospace Conference, Big Sky, MT, Mar. 2001.
K. Gopalan, “Pitch Estimation Using a Modulation Model of
Speech,” Proc. of the International Conference on Signal
Processing (ICSP 2000), World Computer Congress, Beijing, China,
Aug. 2000.
K. Gopalan, S. Wenndt, and E.J. Cupples, “An Analysis of
Speech Under Stress using Modulation Characteristics,” Proc.
of the 25th Annual Conference of the IEEE Industrial Electronics
Society, San Jose, CA, Nov. 1999.
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