Parametric Audio Processing Project

The basic notion of parametric audio processing is to decompose speech and music signals using models that express the signal in terms of physically meaningful parameters and to process these parameters rather than the original signals. By doing this, computationally efficient processing can be achieved and abstract information can be extracted. It is the goal of this project to find parametric models that may be used for analysis, compression, and modification of music signals. The project will be focused on the identification of models and methods for finding the parameters that describe them. It is at the heart of this project to take into account prior knowledge about the origin and structure of music signals as well as the human auditory system. This will facilitate much more efficient compression and enable analysis of complicated mixtures of instruments. The methods and models will be evaluated in terms of the perceived quality of synthesized audio, the statistical properties of the estimators, and by comparing extracted information to annotated music.

[2009-23-03] A. Jakobsson and M. G. Christensen will be giving a tutorial on statistical methods for single- and multi-pitch estimation at EUSIPCO 2009 in Glasgow.

[2009-09.03] Our book on pitch estimation is now available electronically on Morgan & Claypool Publishers' hompage.

[2008-12-31] The projected is now finished as the grant from FTP has expired. More results from the project will follow, though.

[2008-12-01] A. Jakobsson and M. G. Christensen have finished and handed in the draft of our book on statistical methods for pitch estimation.

[2008-11-01] Will be  at UCSB for the next month vistiting Bob Sturm, Ken Rose and others.

[2008-11-01] Presenting recent work at the Asilomar Conference in Monterey, CA.

[2008-10-02] M. G. Christensen gave talk entitled Parametric Audio Processing at the ASIP-net seminar at GN Resound.

[2008-08-14] M. G. Christensen and A. Jakobsson are working on a book on single and multi pitch estimation.

[2008-07-03] Gave invited talk at Acoustics'08 in Paris.

[2008-06-10] The Parametric Audio Processing project now has a nice multichannel audio workstation/lab at Aalborg University.

[2008-04-01] Presented three papers at ICASSP 2008 in Las Vegas.

[2008-02-01] For the next month, M. G. Christensen will be visiting Dan Ellis at Columbia University in New York.

[2007-11-19] For the next month, M. G. Christensen will be visiting Gäel Richard's research group at ENST in Paris.

[2007-11-11] Three papers presented at the Asilomar Conference in Monterey, California. Gave talk at Creative ATC in Scotts Valley.

[2007-08-01] Associate Professor Pedro Vera-Candeas from Jaen in Spain is visiting for the next three months.

[2007-06-25] Visited A. Taylan Cemgil at Cambridge University for a week and gave a talk on Subspace-based Fundamental Frequency Estimation.

[2007-06-18] Gave a talk on Subspace-based Fundamental Frequency Estimation at the Technical University of Denmark.

[2007-06-14] Gave talk on Perceptual Audio Coding at the Danish Engineering Society in Aalborg.

[2007-06-14] The prime ICT advisory body for the Danish science ministry "IKT Rådet" met Thursday June 14. Mads G. Christensen presented his views on the key challenges in Danish information and communication technology research.

[2007-04-30] The joint work on multi-pitch estimation with Petre Stoica and Andreas Jakobsson was presented at ICASSP on Hawaii and received much attention.

[2007-03-30] Gave invited talk on Rate-Distortion Optimized Parametric Audio Coding at DEF's meeting in Århus.

[2007-01-25] Mads G. Christensen received the Danish Independent Research Council's Young Researcher's Award (Young Elite Researcher).

[2007-01-02] The project homepage is now up and running. On this page, I will post news about the project, including publications and results.

[2006-11-30] Received funding for project named parametric audio processing from the Danish Research Council for Technology and Production Sciences. The grant covers a two year postdoctoral position from January 2007 until December 2008.

M. G. Christensen and A. Jakobsson, Multi-Pitch Estimation, Morgan & Claypool Publishers, 2009.

D. Giacobello, M. G. Christensen, J. Dahl, S. H. Jensen, and M. Moonen, Joint Estimation of Short-Term and Long-Term Predictors in Speech Coders, accepted, in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Processing, 2009.

J. X. Zhang, M. G. Christensen, J. Dahl, S. H. Jensen, and M. Moonen, Sub-band implementation of the harmonic MUSIC algorithm, accepted, in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Processing, 2009.

J. X. Zhang, M. G. Christensen, J. Dahl, S. H. Jensen, and M. Moonen, Robust Implementation of the MUSIC Algorithm, accepted, in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Processing, 2009.

J. H. Jensen, M. G. Christensen, D. P. W. Ellis, and S. H. Jensen, Quantitative Analysis of a Common Audio Similarity Measure, accepted, IEEE Trans. on Audio, Speech and Language Processing, 2008.

N. H. van Schijndel, J. Bensa, M, G. Christensen, C. Colomes, B. Edler, R. Heusdens, J. Jensen, S. H. Jensen, W. B. Kleijn, V. Kot, B. Kovesi, J. Lindblom, D. Massaloux, O. A. Niamut, F. Norden, J. H. Plasberg, R. Vafin, S. van de Par, D. Virette, O. Wubbolt, Adaptive RD Optimized Hybrid 
Sound Coding, J. Audio Eng. Society, vol. 56(10), pp. 787-809, 2008.

M. H. Larsen, M. G. Christensen and S. H. Jensen, Multiple Description Trellis-Coded Quantization of Sinusoidal Parameters, IEEE Trans. Signal Processing, vol. 56(10), pp. 5287-5291, 2008.

M. G. Christensen, J. H. Jensen, A. Jakobsson and S. H. Jensen, On Optimal Filter Designs for Fundamental Frequency Estimation, accepted, IEEE Signal Processing Letters, 2008.

J. K. Nielsen, J. R. Jensen, M. G. Christensen, S. H. Jensen, and T. Larsen, Waveform Approximating Residual Audio Coding with Perceptual Pre- and Post-Filtering, accepted, in Rec. Asilomar Conf. Signals, Systems, and Computers, 2008.

H. Laurberg, M. N. Schmidt, M. G. Christensen, and S. H. Jensen, Structured Non-negative Matrix Factorization with Sparsity Patterns, accepted, in Rec. Asilomar Conf. Signals, Systems, and Computers, 2008.

D. Giacobello, M. G. Christensen, J. Dahl, S. H. Jensen, and M. Moonen, Sparse Linear Predictors for Speech Processing, accepted, in Proc. Interspeech, 2008.

J. X. Zhang, M. G. Christensen, J. Dahl, S. H. Jensen, and M. Moonen, Frequency-Domain Parameter Estimations for Binary Masked Signals, accepted, in Proc. Interspeech, 2008.

J. R. Jensen, J. K. Nielsen, M. G. Christensen, S. H., Jensen and T. Larsen, On Fast Implementation of Harmonic MUSIC for Known and Unknown Model Orders, accepted, in Proc. European Signal Processing Conference, 2008.

M. G. Christensen, On Perceptual Distortion Measures and Parametric Modeling, invited, in In Proc. Acoutics'08 Paris, 2008.

M. H. Larsen, M. G. Christensen and S. H. Jensen, Variable Dimension Trellis-Coded Quantization of Sinusoidal Parameters, IEEE Signal Processing Letters, 2008.

H. Laurberg, M. G. Christensen, M. D. Plumbley, L. K. Hansen, and S. H. Jensen, Theorems on Positive Data: On the Uniqueness of NMF, Computational Intelligence and Neuroscience, 2008.

A. Jakobsson, M. G. Christensen and S. H. Jensen, Frequency Selective Sinusoidal Order Estimation, IEE Electronic Letters, vol. 43(21), pp. 1164-1165, 2007.

M. G. Christensen, P. Vera-Candeas, S. D. Somasundaram and A. Jakobsson, Robust Subspace-based Fundamental Frequency Estimation, in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Processing, 2008.

J. H. Jensen, M. G. Christensen, D. P. W. Ellis and S. H. Jensen, A Tempo-Insensitive Distance Measure for Cover Song Identification based on Chroma Features, in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Processing, 2008.

M. H. Larsen, M. G. Christensen, and S. H. Jensen, Multiple Description Quantization of Sinusoidal Parameters, in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Processing, 2008.

M. G. Christensen, A. Jakobsson and S. H. Jensen, Subspace-based Sinusoidal Order Estimation Criteria, in Rec. Asilomar Conf. Signals, Systems, and Computers, 2007.

M. G. Christensen and S. H. Jensen, The Cyclic Matching Pursuit and Its Application to Audio Modeling and Coding, in Rec. Asilomar Conf. Signals, Systems, and Computers, 2007.

M. G. Christensen, A. Jakobsson and S. H. Jensen, Fundamental Frequency Estimation using the Shift-Invariance Property, in Rec. Asilomar Conf. Signals, Systems, and Computers, 2007.

M. G. Christensen, P. Stoica, A. Jakobsson and S. H. Jensen, Multi-Pitch Estimation, Elsevier Signal Processing, 2006.

J. H. Jensen, D. P. W. Ellis, M. G. Christensen and S. H. Jensen, Evaluation of Distance Measures Between Mixture Models of MFCCs, in Int. Conf. on Music Inf. Retrieval, 2007.

J. H. Jensen, M. G. Christensen and S. H. Jensen, A Quantitative Analysis of Mel-Frequency Cepstral Coefficients Based on Synthetic Music Signals, submitted, IEEE Trans. on Audio, Speech and Language Processing, 2006.

M. G. Christensen, A. Jakobsson and S. H. Jensen, Joint High-Resolution Fundamental Frequency and Order Estimation, EEE Trans. on Audio, Speech and Language Processing, 2007.

M. G. Christensen, P. Stoica, A. Jakobsson and S. H. Jensen, The Multi-Pitch Estimation Problem: Some New Solutions, in Proc. IEEE Int. Conf. Acoust., Speech, and Signal Processing, 2007.

J. H. Jensen, M. G. Christensen and S. H. Jensen, Analysis of Music Similarity Measures, in Proc. European Signal Processing Conference, 2007.