Dr Maria Jafari

Contact Details

Title: Research Assistant
Tel: National: 020 7882 7986
International: +44 20 7882 7986
Fax: National: 020 7882 7997
International: +44 20 7882 7997
Email: maria.jafari@elec.qmul.ac.uk
Room: 109

Research Lab: Centre for Digital Music

Research Project: Advanced subband systems for audio source separation

The aim of the project is to derive new solutions for the source separation of audio signals, which can deal with real noisy and reverberant acoustic environments, as well as having the ability to track the individual sources as they move. Certain characteristics of the human auditory system will be exploited in the development of new subband algorithms, such as the ability to localise sound using both phase and amplitude information in different frequency bands. A real time audio source separation prototype system will be constructed.

Publications

Journals

M. G. Jafari, W. Wang, J. A. Chambers, T. Hoya, and A. Cichocki. Sequential blind source separation based exclusively on second-order statistics developed for a class of periodic signals IEEE Transactions on Signal Processing, 54 (3), 1028 - 1040, March 2006.

M. G. Jafari, and J. A. Chambers, "Foetal electrocardiogram extraction by source separation in the wavelet domain". IEEE Trans. on Biomedical Engineering, 52 (3), 390 - 400, Mar 2005.

M. G. Jafari, S. R. Alty and J. A. Chambers, "New natural gradient algorithm for cyclostationary sources", in IEE Vision, Image and Signal Processing, vol. 151, pp. 62- 68, 2004.

M. G. Jafari, J. A. Chambers, and D. P. Mandic, "A novel adaptive learning rate sequential blind source separation algorithm", in Signal Processing, vol. 84, pp. 801- 804, 2004.

J. A. Chambers, M. G. Jafari, and S. McLaughlin, "Variable step-size EASI algorithm for sequential blind source separation", in IEE Electronics Letters, vol. 40, pp. 393 - 394, 2004.

W. Wang, M. G. Jafari, S. Sanei and J. A. Chambers, "Blind separation of convolutive mixtures of cyclostationary signals", in Int. Journal of Adaptive Control and Signal Processing, 2003.

M. G. Jafari, and J. A. Chambers, "A wavelet domain natural gradient algorithm for blind source separation of non-stationary sources", in IEE Electronics Letters, vol. 38, pp. 759-761, 2002.

M. G. Jafari, J. A. Chambers, and D. P. Mandic,"Natural gradient algorithm for cyclostationary sources", in IEE Electronics Letters, vol. 38, pp. 758-759, 2002.

Conferences

M. G. Jafari and M. D. Plumbley. Convolutive blind source separation of speech signals in the low frequency bands. To appear in Proceedings of the 123rd AES Convention, New York, NY, 5-8 October 2007.

M. G. Jafari and M. D. Plumbley. The role of high frequencies in convolutive blind source separation of speech signals. To appear in Proceedings of the 7th International Conference on Independent Component Analysis and Signal Separation (ICA 2007), London, UK, 9-12 Sept 2007.

M. G. Jafari, S. A. Abdallah, M. D. Plumbley and M. E. Davies. Sparse coding for convolutive blind audio source separation. In Proceedings of the 6th International Conference on Independent Component Analysis and Blind Source Separation (ICA 2006), Charleston, SC, USA, 5-8 March 2006, LNCS 3889, pp 132-139, Springer-Verlag, Berlin, 2006.

M. G. Jafari, E. Vincent, S. A. Abdallah, M. D. Plumbley and M. E. Davies. Blind source separation of convolutive audio using an adaptive stereo basis. In: A K Nandi and X Zhu (eds.), Proceedings of the ICA Research Network International Workshop, Liverpool, UK, 18-19 Sept 2006, pp 105-108, 2006. ISBN 0 906370 44 2.

M. D. Plumbley, S. A. Abdallah, T. Blumensath, M. G. Jafari, A. Nesbit, E. Vincent and B. Wang. Musical audio analysis using sparse representations. In COMPSTAT 2006 Proceedings in Computational Statistics, Rome, Italy, pp 104-117. Physical-Verlag, 2006.

E. Vincent, M. G. Jafari and M. D. Plumbley. Preliminary guidelines for subjective evalutation of audio source separation algorithms. In: A K Nandi and X Zhu (eds.), Proceedings of the ICA Research Network International Workshop, Liverpool, UK, 18-19 Sept 2006, pp 93-96, 2006. ISBN 0 906370 44 2.

M. G. Jafari, and J. A. Chambers, "A novel adaptive algorithm for the blind separation periodic sources", to appear in Int. Joint Conf. on Neural Networks, Budapest, Hungary, 2004.

M. G. Jafari, and J. A. Chambers, "Normalised natural gradient algorithm for the separation of cyclostationary sources", in IEEE Int. Conference on Acoustic, Speech and Signal Processing, vol. 5, pp. 301- 304, Hong Kong, 2003.

M. G. Jafari, and J. A. Chambers, "Adaptive noise cancellation and blind source separation ", in Int. Workshop on Independent Component Analysis and Blind Signal Separation, pp. 627-632, Nara, Japan, 2003.

W. Wang, M. G. Jafari, S. Sanei and J. A. Chambers, "Blind separation of convolutive mixtures of cyclostationary sources using an extended natural gradient method", in IEEE Int. Symposium on Signal Processing and its Applications, vol. 2, pp. 93- 96, Paris, France, 2003.

M. G. Jafari, D. P. Mandic and J. A. Chambers, "A fast converging sequential blind source separation algorithm for cyclostationary sources", in Int. Conf. on Knowledge-Based Intelligent Information & Engineering Systems, Oxford, UK, 2003.

M. G. Jafari, and J. A. Chambers, "Time-scale approach to blind source separation", in Proc. of the European Signal Processing Conference, vol. 1, pp.569-572, Toulouse, France, 2002.

M. G. Jafari, and J. A. Chambers, "Sequential blind source separation of cyclostationary sources", IEE Peebles Workshop on Non-Linear and Non-Gaussian Signal Processing, Peebles, UK, 2002.

M. G. Jafari, H. Seah, and J. A. Chambers, "A combined Kalman filter and natural gradient algorithm approach for blind separation of binary distributed sources in time-varying channels", in Proc. of the IEEE Int. Conference on Acoustic, Speech and Signal Processing, vol. 5, pp. 2769-2772, Utah, USA, 2001.

M. G. Jafari and J. A. Chambers, "A combined Kalman filter and natural gradient approach to blind source separation", in IMA International Conference on Mathematics in Signal Processing, Warwick, UK, 2000.

Other

M. G. Jafari, E. Vincent, S. A. Abdallah, M. D. Plumbley and M. E. Davies. An adaptive stereo basis method for convolutive blind audio source separation. Technical Report C4DM-TR-06-04, Centre for Digital Music, Queen Mary University of London, 9 August 2006.

E. Vincent, M. G. Jafari, S. A. Abdallah, M. D. Plumbley and M. E. Davies. Blind Audio Source Separation. Technical Report C4DM-TR-05-01. Centre for Digital Music, Queen Mary University of London, 24 November 2005

M. G. Jafari, "Novel sequential algorithms for blind source separation of instantaneous mixtures", Ph.D. thesis, King’s College London, 2002

M. G. Jafari, "Blind image deconvolution", M.Eng. dissertation, Imperial College, London, 1999