Nima Derakhshan

Contact Information:
Research Center of Information Technology,
Department of Computer Engineering,
Iran University of Science and Technology
Narmak, 16846-13114, Tehran, Iran

Tel: +98 21-7456783
Fax: +98 21-7491128

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Education

M.Sc. of Electrical Engineering
Iran University of Science and Technology, Tehran, Iran (2004 - 2007)
Thesis Title: Design and Implementation of a Speech Quality Assessment System for Assessing Noise Suppression Systems
Supervisors:
Dr. Ahmad Akbari, Associate Professor, Department of Computer Engineering, Iran University of Science and Technology
Dr. Ahmad Ayatollahi, Associate Professor, Department of Electrical Engineering, Iran University of Science and Technology

B.Sc. of Electrical Engineering
Shahid Beheshti University, Tehran, Iran (1999-2004)
Thesis Title: Analytic Decomposition of Speech Signal and its Application to Noise Reduction
Supervisor:
Prof. Mohammad H. Savoji, Professor, Electrical and Computer Engineering Faculty, Shahid Beheshti University


Research interests

• Speech enhancement and noise estimation in harsh noisy environments

• Non-intrusive speech quality assessment

• Speech phase processing

• Joint time-frequency signal processing

• Astrodynamics: satellite tracking and orbit determination


Publications

2009

Noise power spectrum estimation using constrained variance spectral smoothing and minima tracking
Derakhshan, N., Akbari, A., and A. Ayatollahi,
Speech Communication, Volume 51, Issue 11, November, 2009.
show abstract

An objective measure for the musical noise assessment in noise reduction systems
Derakhshan, N., Rahmani, M., Akbari, A., and A. Ayatollahi,
IEEE 34th Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP’09), Taipei, Taiwan, 19–24 April, 2009.
show abstract

A noise cross PSD estimator for dual-microphone speech enhancement based on minimum statistics
Rahmani, M., Akbari, A., Ayad, B., and N. Derakhshan
Journal of Zhejiang University - Science A, Volume 10, Number 6, June, 2009.
show abstract

2008

The advantage of implementing Martin's noise reduction algorithm in critical bands using wavelet packet decomposition and Hilbert transform
Omidi, M., Derakhshan, N., and M. H. Savoji
13th Int. CSI Computer Conference (CSICC'08), Kish Island, Iran, 9–11 March, 2008.
show abstract

2007

Noise power spectrum estimation using time-variant spectral smoothing and low-delay minima tracking
Derakhshan, N., Ayatollahi, A., and A. Akbari
12th Int. Conf. Speech and Computer (SPECOM’07), Moscow, Russia, 15–18 November, 2007.
show abstract

Speech enhancement in harsh noisy environment using analytic decomposition of speech signal in critical bands
Derakhshan, N., and M.H. Savoji
IEEE Int. Symposium on Signal Processing and its Applications (ISSPA’07), Sharjah, United Arab Emirates, 12–15 February, 2007.
show abstract

2006

Perceptual Speech Enhancement Using a Hilbert Transform Based Time-Frequency Representation of Speech
Derakhshan, N and M. H. Savoji
11th Int. Conf. of Speech and Computer (SPECOM'06), St. Petersburg, Russia, 25-29 June, 2006.
show abstract

Perceptual speech enhancement using Hilbert transform
Derakhshan, N., and M.H. Savoji
IEEE Int. Symposium on Industrial Electronics (ISIE’06), Montréal, Canada, 9–13 July, 2006.
show abstract