Joseph Rothweiler

Joe's photo 14 Old Coach Road
Hudson, NH 03051
+1 603 882 8254
joerothweiler@ieee.org
http://www.myown1.com
Strengths
Record of achievement in Speech and Audio Coding, Voice Processing, Communication system design and simulation, Digital Signal Processing, Pattern Recognition. Advanced development through product implementation.
Education
University of Lousiville: BS in EE 1974, M.Eng in EE 1977. Thesis developed a method of analyzing electroencephalogram signals using 2-d spatial matched filtering.
Experience
Lucent Technologies / Agere Systems
99-Member Technical Staff
Martin Marietta Laboratories - Baltimore / Sanders - Nashua, NH
95-99Senior Principal Electrical Engineer II
94-95Project Engineer
ITT Defense Communications Division - Nutley / Clifton, NJ.
85-93Senior Technical Specialist
83-84Senior Member Technical Staff
RCA Government Communications Systems - Somerville, NJ.
81-82Senior Member Technical Staff
75-80Member Technical Staff

Experience

99-
Audio coding specialist, involved in the development and introduction of digital satellite radio. Hired to ensure the successful transition of psychoacoustics-based broadcast-quality stereo compression algorithms from research to firmware ready for consumer product manufacturers. Worked with research to enhance audio quality, develop bit-rate management to optimize audio quality while maximizing the number of transmitted channels, predict error rates and optimize error mitigation strategies. Provided technical direction to implementation teams writing code for Agere DSP-based decoders and studio encoder units, and supported debugging and problem resolution. Specific work included working with customer to isolate quality issues, developing test strategies for encoder and decoder, estimating bit error rates and statistics for error mitigation, and PC-based implementation of real-time demos.
94-99
Staff consultant directing signal processing and communications systems design activities. Developed a 1000 bps vocoder using a novel Mixed Excitation speech model, in real-time on ADI 21020 DSP. Guided 2 groups developing vocoders for a satellite-based system. In one year, we developed a pair of high quality (MOS>3.0) vocoder algorithms at 1400 to 2000 bps using mixed excitation and STC methods. Simulated an ATM satellite link using concatenated Reed-Solomon and Viterbi decoders; developed a Markov error model to predict performance at 1e-10 and lower BER; guided FPGA designers in implementing the decoders. Performed a feasibility study for a Milsatcom packet switching overlay, including digital receiver processing, PSK and FSK demodulation, and packet routing functions.
83-93
Responsible for voice compression and Wireless Modem algorithm development R & D. Provided technical direction to 3 people working on the implementation of voice coding systems. Developed a real time coder using vector quantization and trellis coding to achieve good quality speech at 800 and 400 bits per second. Simulated 4800 and 16k bps coders using Multipulse, CELP and subband coding algorithms. Other tasks included simulation of a 2400 bps full duplex modem echo cancelling algorithm, planning of a speech processing laboratory and development of the hardware architecture for a family of secure voice, data, and FAX terminals. Simulated HF modems using FSK and QPSK modulations, and Reed-Solomon error correction, with fading and multipath channels. Participated in a NATO study to define next-generation 800-1200 bps voice coding algorithms. Performed simulations of signal processing algorithms for the GPS satellite navigation system.
81-82
Senior Engineer responsible for the conceptual design of hardware and software for digital filtering and spectral analysis in communications and pattern recognition systems. Achievements include the design of filter banks for Frequency Division Demultiplexing using digital Fast Fourier Transform hardware and Charge Coupled Device filters. Studies of fast transform techniques for 1802 and 8080-z80 microprocessors led to a Prime Factor Fourier Transform program faster than previous versions.
78-81
Member of engineering team responsible for developing a pattern recognition laboratory within RCA. Planned and implemented a minicomputer facility for processing analog signals and testing recognition algorithms. Designed a data acquisition system for a Hewlett-Packard 1000 computer and wrote software for spectral analysis, statistical analysis, and graphics display, as well as I/O device control routines. Performed statistical analysis of seismic and acoustic vehicle sounds to design target classification algorithms.
75-77
Designed signal processing hardware, including FFT processors using Serial-Parallel multiplers, and low probability of interception modems using pseudorandom sequence spread spectrum modulation and binary correlators for demodulation.

Publications

  1. D. Klose, T. Baird, D. Hampel, and J. Rothweiler, "An LSI FFT Signal Detection and Demodulation Processor," Proc. Government Microcircuit Applications Conference, pp. 222-225, Nov. 1976.
  2. Joseph Rothweiler, A New Procedure for Calculating Dipolar Sources of EEG Discharges, M. Eng Thesis, University of Louisville, Dec. 1977.
  3. J. H. Rothweiler, J. L. Bradshaw, and N. A. Macina, "Investigation of CCD Application to Multichannel Receiver Design," Proc. National Telecommunications Conference, p. 2.4.1 - 2.4.4, Nov. 1979.
    Reprinted in Proc. National Aerospace and Electronics Conference, pp. 237 - 240, May 1980.
  4. R. F. H. Farag and J. H. Rothweiler, "Signal Processing and Pattern Recognition for Intelligent Sensors," presented at the Workshop on Digital Signal and Waveform Analysis, Pattern Recognition and Image Processing Conference, Dec 1980.
  5. J. H. Rothweiler, "Implementation of the In-Order Prime Factor Transform for Variable Sizes," IEEE Trans. on Acoustics, Speech, and Signal Processing, pp. 105-107, Feb. 1982.
  6. J. H. Rothweiler, "Polyphase Quadrature Filters - A New Subband Coding Technique," Proc. 1983 International Conference on Acoustics, Speech, Signal Processing, Boston, MA, pp. 1280 - 1283.
  7. J. Rothweiler and J. Carmody, "A Multiple Rate Low Rate Voice CODEC," Proc. 1985 International Conference on Acoustics, Speech, and Signal Processing, Tampa, FL, pp. 248-251.
    Reprinted in Vector Quantization, Huseyin Abut, Ed, New York: IEEE Press, 1990, pp. 521-524.
  8. J. Carmody and J. Rothweiler, "Speech Coding at 800 and 400 Bits per Second," Electrical Communication, Vol. 59, No. 3, pp. 260-265, 1985.
  9. J. Rothweiler and J. Bertrand, "Low Bit Rate Speech Transmission," Proc. MILCOM-85, Boston, MA, pp. 56-59, Oct. 1985.
  10. J. Rothweiler, "Performance of a Real Time Low Rate Voice CODEC," Proc. 1986 International Conference on Acoustics, Speech, and Signal Processing, Tokyo, Japan, pp. 3039-3042.
    Reprinted in Proc. AFCEA Tactical Communications Conference, Ft. Wayne, IN, Apr. 1986.
  11. J. Rothweiler, "Application of Speech Coding to Military Communications Systems," Proc. Speech-Tech 88, New York, NY, pp. 215-216, Apr. 26-28, 1988.
  12. J. Rothweiler and Y.-J. Liu, "Low Rate Voice Algorithm for HF ECCM Applications,". Proc. Military Speech-Tech 88, San Francisco, CA. pp. 79-83, Sep. 14-16, 1988.
  13. J. Rothweiler, "Performance Testing Issues in Low Rate Voice Coding," Presented at 1989 Test & Evaluation of Digital Speech Communications Systems Workshop, Hanscom AFB, Bedford, MA, March 21-22, 1989.
  14. Y. J. Liu and J. Rothweiler, "A High Quality Speech Coder at 400 BPS," Proc. ICASSP-89, Glasgow, Scotland, pp. 204-206, May 23-26, 1989.
  15. J. Rothweiler, "A Noise-Robust 1200 bps voice coder," Proc. IEEE Workshop on Speech Coding for Telecommunications, Whistler, BC, Canada, pp. 58-59, Sep. 11-13, 1991.
  16. J. Rothweiler, "Noise-Robust 1200 BPS Voice Coding," Proc. 1992 Tactical Communications Conference, Ft. Wayne, IN, pp. 65-69, Apr. 28-30, 1992.
  17. T.S. Sun, S. Nandkumar, J. Carmody, and J. Rothweiler, "Speech Enhancement Using a Ternary-Decision Based Filter," Proc. ICASSP-95, Detroit, MI, pp. 820-823, May 1995
  18. J. Rothweiler, "A Rootfinding Algorithm for Line Spectral Frequencies," Proceedings of the 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP-99), March 15-19, 1999, Phoenix, AZ, USA, pp. II-661 - II-664.
  19. J. Rothweiler, "On Polynomial Reduction in the Computation of LSP Frequencies," IEEE Transactions on Speech and Audio Processing, September, 1999.
  20. C. Faller, R. Haimi-Cohen, P. Kroon, and J. Rothweiler, "Perceptually-Based Joint-Program Audio Coding," Proc. 113th Audio Engineering Society Convention, October 5-8, 2002, Los Angeles, CA, USA.

Patents

4,691,292 Joseph H. Rothweiler, "System for Digital Multiband Filtering" , Filed Apr. 13, 1983, Issued Sep. 1, 1987. Assigned to RCA Corporation, Princeton, NJ.

4,975,956 Yu J. Liu and Joseph Rothweiler, "Low-Bit-Rate Speech Coder Using LPC Data Reduction Processing" , Filed July 26, 1989, Issued Dec. 4, 1990. Assigned to ITT Corp.

5,012,518 Yu J. Liu and Joseph Rothweiler, "Low-Bit-Rate Speech Coder Using LPC Data Reduction Processing" , Filed Aug. 16, 1990, Issued Apr. 30, 1991. Assigned to ITT Corp.

5,649,051 Joseph Rothweiler, John Carmody, and Srinivas Nandkumar, "Speech Coder Using LSF Conversion and Low- Bit-Rate Encoding," Filed June 1, 1995., Issued July 15, 1997. Assigned to Martin Marietta Corporation.

5,668,925 Joseph Rothweiler, John Carmody, and Srinivas Nandkumar, "Low data rate speech encoder with mixed excitation," Filed June 1, 1995, Issued September 16, 1997. Assigned to Martin Marietta Corporation.

Professional Activities

North Jersey Section IEEE, Acoustics, Speech, and Signal Processing Society Chapter: Secretary 1986, Treasurer 1987.

Technical paper reviewer for IEEE Transactions on Acoustics, Speech, and Signal Processing and IEEE Transactions on Circuits and Systems.

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© 2002 Joseph Rothweiler
Last modified $Date: 2002/09/24 13:21:36 $