Publications

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Journal Publications

15. S. Sandoval and P. L. De Leon, “The Relationship of the Instantaneous Spectrum to Time and Frequency Domain Analyses,” in preparation J. Sig. Process., Nov. 2019.

14. M. Martinez and P. L. De Leon, “Falls Risk Classification of Older Adults Using Deep Neural Networks and Transfer Learning,” accepted IEEE J. Biomed. Health Inform., Mar. 2019.
Paper ]

13. M. Martinez, P. L. De Leon, and D. Keeley, “Bayesian Classification of Falls Risk,” Gait & Posture, vol. 67, pp. 99-103, Jan. 2019. DOI: 10.1016/j.gaitpost.2018.09.028
[ Paper ]

12. S. Sandoval and P. L. De Leon, “The Instantaneous Spectrum: A General Framework for Time-Frequency Analysis,” IEEE Trans. Sig. Process., vol. 66, no. 21, pp. 5679-5693, Nov. 2018. DOI: 10.1109/TSP.2018.2869121
[ Paper | ISA Code ]

11. Z. Wu, P. L. De Leon, C. Demiroglu, A. Khodabakhsh, S. King, Z. Ling, D. Saito, B. Stewart, T. Toda, M. Wester, and J. Yamagishi, “Anti-Spoofing for Text-Independent Speaker Verification: An Initial Database, Comparison of Countermeasures, and Human Performance,” IEEE Trans. Audio, Speech, and Language Proc., vol. 24, no. 4, pp. 768-783, Apr. 2016. DOI: 10.1109/TASLP.2016.2526653
Paper ]

10. R. McClanahan and P. L. De Leon, “Reducing Computation in an i-Vector Speaker Recognition System using a Tree-Structured Universal Background Model,” Speech Communication, vol. 66, pp. 36-46, Feb. 2015.
Paper ]

9. P. L. De Leon, M. Pucher, J. Yamagishi, I. Hernaez, and I. Saratxaga, “Evaluation of Speaker Verification Security and Detection of HMM-Based Synthetic Speech,” IEEE Trans. Audio, Speech, and Language Proc., vol. 20, no. 8, pp. 2280-2290, Oct. 2012.  DOI: 10.1109/TASL.2012.2201472
Paper ]

8. L. E. Boucheron, P. L. De Leon, and S. Sandoval, “Low Bit-Rate Speech Coding through Quantization of Mel-Frequency Cepstral Coefficients,” IEEE Trans. Audio, Speech, and Language Proc., vol. 20, no. 2, pp. 610-619, Feb. 2012.
Paper | MFCC Coding Demo.zipMFCC Coding Demo2.zip ]

7. V. R. Apsingekar and P. L. De Leon, “Speaker Verification Score Normalization Using Speaker Model Clusters,” Speech Communication, vol. 53, no. 1, pp. 110-118, Jan. 2011.
Paper ]

6. S. M. Brahma, P. L. De Leon, and R. G. Kavasseri, “Investigating the Option of Removing Anti-Aliasing Filter From Digital Relays,” IEEE Trans. Power Delivery, vol. 24, no. 4, pp. 1864-1868, Oct. 2009.
Paper ]

5. V. R. Apsingekar and P. L. De Leon, “Speaker Model Clustering for Efficient Speaker Identification in Large Population Applications,” IEEE Trans. Audio, Speech, and Language Proc., vol. 17, no. 4, pp. 848-853, May 2009.
Paper ] [A minor typo in Equation (11) has been corrected]

4. A. Daga, G. R. Lovelace, D. K. Borah, and P. L. De Leon, “Terrain-Based Simulation of IEEE 802.11a and b Physical Layers on the Martian Surface,” IEEE Trans. Aerosp. Electron. Syst, vol. 43, no. 4, pp. 1617-1624, Oct. 2007.
Paper ]

3. S. Berner and P. L. De Leon, “Subband Transforms for Adaptive, RLS Direct Sequence Spread Spectrum Receivers,” IEEE Trans. Signal Proc., vol. 53, no. 10, pp. 3773-3779, Oct. 2005.
Paper ]

2. V. Chukkala, P. De Leon, S. Horan, and V. Velusamy, “Radio Frequency Channel Modeling for Proximity Networks on the Martian Surface,” Computer Networks (Elsevier), Vol. 47, Issue 5, pp. 751-763, Apr. 2005.
Paper ]

1. P. L. De Leon and D. M. Etter, “Experimental results with increased bandwidth analysis filters in oversampled subband acoustic echo cancelers,” IEEE SP Letters, vol. 2, no. 1, pp.1-3, Jan. 1995.
Paper ]

Book

Co-authored chapter 7 “Speaker Recognition Anti-Spoofing” with Nicholas Evans, Tomi Kinnunen, Junichi Yamagishi, Zhizheng Wu, Federico Alegre, and Phillip De Leon in Handbook of Biometric Anti-Spoofing, edited by Sébastien Marcel, Mark Nixon, and Stan Z. Li, Springer, 2014.
Info ]

Co-authored chapter 11 with Delores M. Etter in Subband and Wavelet Transforms: Design and Applications edited by Ali Akansu and Mark J. T. Smith, Kluwer Academic Publishers, 1995.
Paper ]

Conference Publications

67. S. Sandoval, M. Bredin, P. L. De Leon, and S. Terrazas, “Controlling the Operational Behavior of Complex Empirical Mode Decomposition,” submitted to Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), 2020.
[ Paper ]

66. S. Sandoval, M. Bredin, and P. L. De Leon, “Fingerprinting Radio Frequency Devices Using the Instantaneous Frequency,” submitted to Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), 2020.
[ Paper ]

65. S. Sandoval, M. Bredin, and P. L. De Leon, “Using Linear Prediction to Mitigate End Effects in Empirical Mode Decomposition,” in Proc. IEEE GlobalSIP, 2018.
Paper ]

64. S. Sandoval, M. Bredin, and P. L. De Leon, “Dominant Component Tracking for Empirical Mode Decomposition using a Hidden Markov Model,” in Proc. IEEE GlobalSIP, 2018.
Paper ]

63. S. Sandoval and P. L. De Leon, “Advances in Empirical Mode Decomposition for Computing Instantaneous Amplitudes and Instantaneous Frequencies,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), 2017.
Paper ]

62. M. Martinez, P. L. De Leon, and D. Keeley, ” Novelty Detection for Predicting Falls Risk using Smartphone Gait Data,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), 2017.
Paper ]

61. M. Martinez and P. L. De Leon,”Unsupervised Segmentation and Labeling for Smartphone Acquired Gait Data,” in Proc. Int. Telemetering Conf., 2016.
Paper ] [Several minor typos have been corrected]

60. M. Biswal, Y. Hao, P. Chen, S. Brahma, H. Cao, and P. De Leon, “Signal Features for Classification of Power System Disturbances using PMU Data,” in Proc. Power Systems Computation Conference (PSCC), 2016.[ Paper ]

59. S. Sandoval, P. L. De Leon, and J. M. Liss, “Hilbert Spectral Analysis of Vowels using Intrinsic Mode Functions,” in Proc. IEEE Automatic Speech Recognition and Understanding Workshop (ASRU), 2015.
Paper ] [A typo in Equation (4) has been corrected]

58. M. Martinez and P. L. De Leon, ” A Smartphone-Based Gait Data Collection System for the Prediction of Falls in Elderly Adults,” in Proc. Int. Telemetering Conf., 2015.
Paper ]

57. G. Hinojos and P. L. De Leon, “Face Recognition using Distributed, Mobile Computing,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), pp. 2179-2183, 2014.
Paper ]

56. R. D. McClanahan, B. Stewart, and P. L. De Leon, “Performance of i-Vector Speaker Verification and the Detection of Synthetic Speech,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), pp. 3779-3783, 2014.
Paper ]

55. R. D. McClanahan and P. L. De Leon, “Towards a More Efficient SVM Supervector Speaker Verification System using Gaussian Reduction and a Tree-Structured Hash,” in Proc. Interspeech Conf, pp. 3670-3673, 2013.
Paper ]

54. P. L. De Leon and S. Sanchez, “Voice Activity Detection using a Sliding-Window, Maximum Margin Clustering Approach,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), pp. 6674-6678, 2013.
Paper ]

53. P. L. De Leon and B. Stewart, “Synthetic Speech Detection based on Selected Word Discriminators,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), pp. 3004-3008, 2013.
Paper ]

52. L. E. Boucheron and P. L. De Leon, “Low-SNR, Speaker-Dependent Speech Enhancement using GMMs and MFCCs,” in Proc. Interspeech Conf, 2012.
Paper ]

51. R. D. McClanahan and P. L. De Leon, “Mixture Component Clustering for Efficient Speaker Verification,” in Proc. Interspeech Conf, 2012.
Paper ]

50. P. L. De Leon, B. Stewart, and J. Yamagishi, “Synthetic Speech Discrimination using Pitch Pattern Statistics Derived from Image Analysis,” in Proc. Interspeech Conf, 2012.
Paper ]

49. P. L. De Leon, I. Hernaez, I. Saratxaga, M. Pucher, and J. Yamagishi, “Detection of Synthetic Speech for the Problem of Imposture,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), pp. 4844-4847, 2011.
Paper ] [A minor typo in Equation (2) has been corrected]

48. L. E. Boucheron, P. L. De Leon, S. Sandoval, “Hybrid Scalar/Vector Quantization of Mel-Frequency Cepstral Coefficients for Low Bit-Rate Coding of Speech,” in Proc. Data Compression Conf. (DCC), pp. 103-112, 2011.
Paper ]

47. P. L. De Leon, M. Pucher, and J. Yamagishi, “Evaluation of the Vulnerability of Speaker Verification to Synthetic Speech,” in Proc. IEEE Speaker and Language Recognition Workshop (Odyssey), pp. 151-158, 2010.
Paper ]

46. P. L. De Leon, V. R. Apsingekar, M. Pucher, and J. Yamagishi, “Revisiting the Security of Speaker Verification Systems Against Imposture Using Synthetic Speech,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), pp. 1798-1801, 2010.
Paper ]

45. V. R. Apsingekar and P. L. De Leon, “Support Vector Machine Based Speaker Identification Systems Using GMM Parameters,”  in Proc. Asilomar Conf. on Signals, Systems and Computers, pp. 1766-1769, 2009.
Paper ]

44. M. Ries, B. Gardlo, M. Rupp, and P. De Leon, “Low-Complexity Voice Detector for Mobile Environments,” Proc. Int. Conf. on Systems, Signals & Image Processing (IWSSIP), pp. 1-4, 2009.
Paper ]

43. A. Akula, V. Apsingekar, and P. L. De Leon, “Speaker Identification in Room Reverberation using GMM-UBM,” Proc. IEEE DSP Workshop, pp. 37-41, 2009.
Paper ]

42. V. R. Apsingekar and P. L. De Leon, “Efficient Speaker Identification using Distributional Speaker Model Clustering,” Asilomar Conf. on Signals, Systems and Computers, pp. 1260-1264, 2008.
Paper ]

41. K. Ravulakollu, V. R. Apsingekar, and P. L. De Leon, “Efficient Speaker Verification System using Speaker Model Clustering for T- and Z-Normalizations,” in Proc. Int. Carnahan Conf. on Security Technology (ICCST), pp. 56-62, 2008.
Paper ]

40. L. E. Boucheron and P. L. De Leon, “On the Inversion of Mel-Frequency Cepstral Coefficients for Speech Enhancement Applications,” in Proc. Int. Conf. Signals and Electronic Systems (ICSES), pp.485-488, 2008.
Paper ]

39. A. Akula and P. L. De Leon, “Compensation for Room Reverberation in Speaker Identification,” in Proc. European Signal Processing Conf. (EUSIPCO), 2008.
Paper ]

38. V. R. Apsingekar and P. L. De Leon, “Efficient Speaker Identification using Speaker Model Clustering,” in Proc. European Signal Processing Conf. (EUSIPCO), 2008.
Paper ]

37. V. Apsingekar and P. L. De Leon, “Reducing Speaker Model Search Space in Speaker Identification,” in Proc. Biometrics Sym., pp. 1-6, 2007.
Paper ]

36. P. L. De Leon and A. L. Trevizo, “Speaker Identification in the Presence of Room Reverberation,” in Proc. Biometrics Sym., pp. 1-6, 2007.
Paper ]

35. A. Daga, D. K. Borah, G. R. Lovelace and P. De Leon, “Physical Layer Effects on MAC Layer Performance of IEEE 802.11 a and b WLAN on the Martian Surface,” in Proc. IEEE Aerospace Conf., 2006.
Paper ]

34. D. K. Borah, A. Daga, G. R. Lovelace and P. De Leon, “Performance Evaluation of the IEEE 802.11a and b WLAN Physical Layer on the Martian Surface ,” in Proc. IEEE Aerospace Conf., pp. 1429-1437, 2005.
Paper ]

33. V. Chukkula and P. De Leon, “Simulation and Analysis of the Multipath Environment of Mars,” in Proc. IEEE Aerospace Conf., pp. 1678-1683, 2005.
Paper ]

32. D. K. Borah and P. De Leon, “Speaker Identification in the Presence of Packet Losses,” in Proc. IEEE DSP Workshop, pp. 302-306, 2004.
Paper ]

31. J. San Filippo and P. DeLeon, “Evaluation of Spherically Invariant Random Process Parameters as Discriminators for Speaker Identification,” in Proc. IEEE DSP Workshop, pp. 307-310, 2004.
Paper ]

30. V. Chukkula, P. De Leon, S. Horan, and V. Velusamy, “Modeling the Radio Frequency Environment of Mars for Future Wireless, Networked Rovers and Sensor Webs,” in Proc. IEEE Aerospace Conf., vol. 2, pp. 1329-1336, 2004.
Paper ]

29. R. Lyman, Q. Wang, P. De Leon, and S. Horan , “Transmission Parameter Estimation for an Autoconfigurable Receiver,” in Proc. IEEE Aerospace Conf., vol. 2, pp. 1305-1311, 2004.
Paper ]

28. P. De Leon, Q. Wang, S. Horan, and R. Lyman, ” A Design for Satellite Ground Station Receiver Autoconfiguration,” in Proc. Int. Telemetering Conf., 2003.
Paper ]

27. A. Cahill, P. De Leon, C. Sreenan, “Link Cache Extensions for predictive Routing and Repair in Ad Hoc Wireless Networks,” inProc. IEEE Conf. Mobile and Wireless Communications Networks (MWCN), pp. 53-57, 2002.
Paper ]

26. N. Chen and P. De Leon, “Blind Image Separation through Kurtosis Maximization,” in Proc. Asilomar Conf. Signals, Systems and Computers, vol. 1, pp. 318-322, 2001.
Paper ]

25. S. Berner and P. De Leon, “Subband Transforms for Adaptive Direct Sequence Spread Spectrum Receivers,” in Proc. Asilomar Conf. Signals, Systems and Computers, vol. 2, pp. 1103-1107, 2001.
Paper ]

24. P. De Leon and Y. Ma, “Blind Separation of L Sources from M Mixtures of Speech Signals,” in Proc. Meeting of the Acoustical Society of America, 2000.
Paper ]

23. P. De Leon and Y. Ma, “Blind Source Separation of Mixtures of Speech Signals with Unknown Propagation Delays,” in Proc. Meeting of the Acoustical Society of America, 2000.
Paper ]

22. P. De Leon and Y. Ma, “Normalized, HOS-Based, Blind Speech Separation Algorithms,” in Proc. Asilomar Conf. Signals, Systems and Computers, vol. 2, pp. 1197-1201, 2000.
Paper ]

21. S. Berner and P. De Leon, “Parallel Digital Architectures for High-Speed Adaptive DSSS Receivers,” in Proc. Asilomar Conf. Signals, Systems and Computers, vol. 2, pp. 1298-1302, 2000.
Paper ]

20. P. De Leon, “Short-Time Kurtosis of Speech Signals with Application to Co-Channel Speech Separation,” in Proc. IEEE Int. Conf. Multimedia and Expo (ICME), vol. 2, pp. 831-833, 2000.
Paper ]

19. P. De Leon, “Computer Music in Undergraduate Digital Signal Proc.,” in Proc. American Society for Engineering Education/Gulf Southwestern Region, 2000.
Paper ]

18. P. L. De Leon, W. Kober, K. Krumvieda, and J. Thomas, “Subband Kalman Filtering with Applications to Target Tracking,” inProc. Int. Conf. Signal Proc. Applications & Technologies (ICSPAT), 1999.
Paper ]

17. P. L. De Leon and B. J. Scaife, ” Spread Spectrum Carrier Estimation with Unknown Doppler Shift,” in Proc. Int. Conf. Signal Proc. Applications & Technologies (ICSPAT), 1999.
Paper ]

16. S. Berner and P. L. De Leon, “FPGA-Based Filterbank Implementation for Parallel Digital Signal Proc.,” in Proc. NASA Sym. on VLSI Design, 1999.
Paper ]

15. P. De Leon and H. Jiang, “Parameter Distributions for Speech Signals Modelled with Spherically Invariant Random Processes,” in Proc. Midwest Sym. Circuits and Systems, vol. 1, pp. 245-248, 1999.
Paper ]

14. P. L. De Leon and C. J. Sreenan, “An Adaptive Predictor for Media Playout Buffering,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), vol. 6, pp. 3097-3100, 1999.
Paper ]

13. B. Scaife and P. L. De Leon, “Doppler Shifted Spread Spectrum Carrier Recovery Using Real-Time DSP Techniques,” in Proc. Int. Telemetering Conf., 1998.
Paper ]

12. P. L. De Leon, “On the Use of Filter Banks for Parallel Digital Signal Proc.,” in Proc. NASA Sym. on VLSI Design, 1998.
Paper ]

11. J. P. LeBlanc and P. L. De Leon, “Speech Separation by Kurtosis Maximization,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), vol. 2, pp. 1029-1032, 1998.
Paper ]

1o. P. L. De Leon, “Building a Real-Time Digital Signal Proc. Course and Teaching Laboratory,” in Proc. American Society for Engineering Education/Gulf Southwestern Region, 1998.
Paper ]

9. E. S. Otto and P. L. De Leon, “Digital CPFSK Transmitter and Noncoherent Receiver/Demodulator Implementation,” in Proc. Int. Telemetering Conf., 1997.
Paper ]

8. J. P. LeBlanc and P. L. De Leon, “Source Separation of Speech Signals using Kurtosis Maximization,” in Proc. Allerton Conf. Communications, Control, and Computing, 1997.
Paper ]

7. P. L. De Leon, “Real-Time DSP-Based Carrier Recovery With Unknown Doppler Shift,” in Proc. Int. Conf. Signal Proc. Applications & Technologies (ICSPAT), 1997.
Paper ]

6. P. L. De Leon, “Optimization of the LMS Subband, Adaptive Filter System,” in Proc. Int. Conf. Signal Proc. Applications & Technologies (ICSPAT), 1997.
Paper ]

5. P. L. De Leon and D. M. Etter, “Experimental results of subband acoustic echo cancelers under spherically invariant random processes,” in Proc. IEEE Int. Conf. Acoustics, Speech & Signal Proc. (ICASSP), vol. 2, pp. 961-964, 1996.
Paper ]

4. P. L. De Leon and D. M. Etter, “Examining the effects of room response in oversampled, subband acoustic echo cancelers,” inProc. Asilomar Conf. Signals, Systems and Computers, vol. 1, pp. 464-467, 1995.
Paper ]

3. P. L. De Leon and D. M. Etter, “Mean square error calculations for the subband adaptive filter system,” in Proc. IEEE Workshop Applications Signal Proc. to Audio and Acoustics, pp. 107-110, 1995.
Paper ]

2. P. L. De Leon and D. M. Etter, “Experimental results of a modified architecture for oversampled subband acoustic echo cancelers,” in Proc. IEEE DSP Workshop, pp. 294-296, 1994.
Paper ]

1. P. L. De Leon and D. M. Etter, “On the design of analysis/synthesis filters for a 2-channel, perfect reconstruction filter bank,” inProc. NAECOM, vol. 1, pp. 94-100, 1993.
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