International Audio Laboratories Erlangen

Publications

  1. Saeid, Rahim, Alku, Paavo, and Bäckström, Tom
    Feature Extraction Using Power-Law Adjusted Linear Prediction With Application to Speaker Recognition Under Severe Vocal Effort Mismatch
    IEEE Trans. Audio, Speech, Lang. Process., 24(1): 42–53, 2016. 
    @article{saeid2016feature,
title={Feature Extraction Using Power-Law Adjusted Linear Prediction With Application to Speaker Recognition Under Severe Vocal Effort Mismatch},
author={Saeid, Rahim and Alku, Paavo and B{\"a}ckstr{\"o}m, Tom},
journal=IEEE_J_ASLP,
volume={24},
number={1},
pages={42--53},
year={2016}
}
  2. BÄCKSTRÖM, TOM, SCHUBERT, BENJAMIN, MULTRUS, MARKUS, DISCH, SASCHA, SCHMIDT, KONSTANTIN, and PIETRZYK, GRZEGORZ
    APPARATUS AND METHOD FOR AUDIO SIGNAL ENVELOPE ENCODING, PROCESSING AND DECODING BY SPLITTING THE AUDIO SIGNAL ENVELOPE EMPLOYING DISTRIBUTION QUANTIZATION AND CODING
    WO Patent WO2,014,198,724, 2016. 
    @misc{backstrom2016apparatus,
title={APPARATUS AND METHOD FOR AUDIO SIGNAL ENVELOPE ENCODING, PROCESSING AND DECODING BY SPLITTING THE AUDIO SIGNAL ENVELOPE EMPLOYING DISTRIBUTION QUANTIZATION AND CODING},
author={B{\"A}CKSTR{\"O}M, TOM and SCHUBERT, BENJAMIN and MULTRUS, MARKUS and DISCH, SASCHA and SCHMIDT, KONSTANTIN and PIETRZYK, GRZEGORZ},
year={2016},
month=jan # "~28",
note={WO Patent WO2,014,198,724}
}
  3. Jokinen, Emma, Paulus, Jouni, and Bäckström, Tom
    Intelligibility enhancement of foreground speech in stereo material for audio-visual applications
    In Proc. EUSIPCO, 2016. 
    @inproceedings{jokinen2016intelligibility,
title={Intelligibility enhancement of foreground speech in stereo material for audio-visual applications},
author={Jokinen, Emma and Paulus, Jouni and B{\"a}ckstr{\"o}m, Tom},
booktitle= eusipco,
year={2016}
}
  4. Fischer, Johannes, Bhardwaj, Kanav, Breiling, Marco, Leyh, Martin, and Bäckström, Tom
    Ultra-low power acoustic front-ends for natural language user interfaces
    In VDE Kongress "Internet der Dinge", 2016. 
    @inproceedings{fischer2016ultra,
title={Ultra-low power acoustic front-ends for natural language user interfaces},
author={Fischer, Johannes and Bhardwaj, Kanav and Breiling, Marco and Leyh, Martin and B{\"a}ckstr{\"o}m, Tom},
booktitle={VDE Kongress "Internet der Dinge"},
year={2016}
}
  5. Fischer, Johannes and Bäckström, Tom
    Joint enhancement and coding of speech by incorporating Wiener filtering in a CELP codec
    In Proc. Interspeech, 2016. 
    @inproceedings{fischer2016joint,
author = {Fischer, Johannes and Bäckström, Tom},
title = {Joint enhancement and coding of speech by incorporating Wiener filtering in a {CELP} codec},
booktitle = interspeech,
year = {2016},
}
  6. Korse, Srikanth, Jähnel, Tobias, and Bäckström, Tom
    Entropy Coding of Spectral Envelopes for Speech And Audio Coding Using Distribution Quantization
    In Proc. Interspeech, 2016. 
    @inproceedings{korse2016entropy_dq,
author = {Korse, Srikanth and Jähnel, Tobias and Bäckström, Tom},
title = {Entropy Coding of Spectral Envelopes for Speech And Audio Coding Using Distribution Quantization},
booktitle = interspeech,
year = {2016}
}
  7. Bäckström, Tom, Ghido, Florin, and Fischer, Johannes
    Blind Recovery of Perceptual Models in Distributed Speech and Audio Coding
    In Proc. Interspeech, 2016. 
    @inproceedings{backstrom2016iot,
author = {Bäckström, Tom and Ghido, Florin and Fischer, Johannes},
title = {Blind Recovery of Perceptual Models in Distributed Speech and Audio Coding},
booktitle = interspeech,
year = {2016}
}
  8. Airaksinen, Manu, Bäckström, Tom, and Alku, Paavo
    Automatic glottal inverse filtering with non-negative matrix factorization
    In Proc. Interspeech, 2016. 
    @inproceedings{airaksinen2016automatic,
author = {Airaksinen, Manu and Bäckström, Tom and Alku, Paavo},
title = {Automatic glottal inverse filtering with non-negative matrix factorization},
booktitle = interspeech,
year = {2016},
month = sep
}
  9. Moriya, Takehiro, Kamamoto, Yutaka, Harada, Noboru, Bäckström, Tom, Helmrich, Christian, and Fuchs, Guillaume
    Harmonic Model for MDCT based Audio Coding with LPC Envelope
    In Proc. EUSIPCO, 2015. 
    @inproceedings{moriya2015harmonic,
title={Harmonic Model for MDCT based Audio Coding with LPC Envelope},
author={Moriya, Takehiro and Kamamoto, Yutaka and Harada, Noboru and B{\"a}ckstr{\"o}m, Tom and Helmrich, Christian and Fuchs, Guillaume},
booktitle=eusipco,
year={2015}
}
  10. Jokinen, Emma, Lecomte, Jérémie, Schinkel-Bielefeld, Nadja, and Bäckström, Tom
    Intelligibility evaluation of speech coding standards in severe background noise and packet loss conditions
    In Proc. ICASSP, 2015. 
    @inproceedings{jokinen2015evs_intelligibility,
author = {Jokinen, Emma and Lecomte, Jérémie and Schinkel-Bielefeld, Nadja and Bäckström, Tom},
title = {Intelligibility evaluation of speech coding standards in severe background noise and packet loss conditions},
booktitle = icassp,
year = {2015},
month = {April},
}
  11. Jähnel, Tobias, Bäckström, Tom, and Schubert, Benjamin
    Envelope Modeling for Speech and Audio Processing Using Distribution Quantization
    In Proc. EUSIPCO, 2015. 
    @inproceedings{jahnel2015envelope,
title={Envelope Modeling for Speech and Audio Processing Using Distribution Quantization},
author={J{\"a}hnel, Tobias and B{\"a}ckstr{\"o}m, Tom and Schubert, Benjamin},
booktitle=eusipco,
year={2015}
}
  12. Fuchs, Guillaume, Baeckstroem, Tom, Geiger, Ralf, Jaegers, Wolfgang, and Ravelli, Emmanuel
    APPARATUS AND METHOD FOR SYNTHESIZING AN AUDIO SIGNAL, DECODER, ENCODER, SYSTEM AND COMPUTER PROGRAM
    US Patent 20,150,332,694, 2015. 
    @misc{fuchs2015apparatus,
title={APPARATUS AND METHOD FOR SYNTHESIZING AN AUDIO SIGNAL, DECODER, ENCODER, SYSTEM AND COMPUTER PROGRAM},
author={Fuchs, Guillaume and Baeckstroem, Tom and Geiger, Ralf and Jaegers, Wolfgang and Ravelli, Emmanuel},
year={2015},
month=nov # "~19",
note={US Patent 20,150,332,694}
}
  13. Fischer, Johannes and Bäckström, Tom
    Comparison of Windowing Schemes for Speech Coding
    In Proc. EUSIPCO, 2015. 
    @inproceedings{fischer2015comparison,
title={Comparison of Windowing Schemes for Speech Coding},
author={Fischer, Johannes and B{\"a}ckstr{\"o}m, Tom},
booktitle=eusipco,
year={2015}
}
  14. Craciun, Alexandra, Uhle, Christian, and Bäckström, Tom
    An evaluation of stereo speech enhancement methods for different audio-visual scenarios
    In Proc. EUSIPCO, 2015. 
    @inproceedings{craciun2015evaluation,
title={An evaluation of stereo speech enhancement methods for different audio-visual scenarios},
author={Craciun, Alexandra and Uhle, Christian and B{\"a}ckstr{\"o}m, Tom},
booktitle=eusipco,
year={2015}
}
  15. Bäckström, Tom and Helmrich, Christian R.
    Arithmetic coding of speech and audio spectra using TCX based on linear predictive spectral envelopes
    In Proc. ICASSP, 2015. 
    @inproceedings{backstrom2015newartih,
author = {Bäckström, Tom and Helmrich, Christian R.},
title = {Arithmetic coding of speech and audio spectra using {TCX} based on linear predictive spectral envelopes},
booktitle = icassp,
year = {2015},
month = {April},
}
  16. Bäckström, Tom, Fischer~Pedersen, Christian, Fischer, Johannes, and Pietrzyk, Grzergorz
    Finding line spectral frequencies using the fast Fourier transform
    In Proc. ICASSP, 2015. 
    @inproceedings{backstrom2015fftlsf,
author = {Bäckström, Tom and Fischer~Pedersen, Christian and Fischer, Johannes and Pietrzyk, Grzergorz},
title = {Finding line spectral frequencies using the fast Fourier transform},
booktitle = icassp,
year = {2015},
month = {April},
}
  17. BÄCKSTRÖM, TOM, FISCHER PEDERSEN, CHRISTIAN, FISCHER, JOHANNES, HUTTENBERGER, MATTHIAS, and PINO, ALFONSO
    Concept for encoding of information
    EP Patent EP20140158396 20,140,307, 2015. 
    @misc{backstrom2015concept,
title={Concept for encoding of information},
author={B{\"A}CKSTR{\"O}M, TOM and FISCHER PEDERSEN, CHRISTIAN and FISCHER, JOHANNES and HUTTENBERGER, MATTHIAS and PINO, ALFONSO},
year={2015},
month=oct # "~1",
note={EP Patent EP20140158396 20,140,307},
}
  18. Airaksinen, Manu, Bäckström, Tom, and Alku, Paavo
    Glottal Inverse Filtering Based on Quadratic Programming
    In Proc. Interspeech, 2015. 
    @inproceedings{airaksinen2015glottal,
title={Glottal Inverse Filtering Based on Quadratic Programming},
author={Airaksinen, Manu and B{\"a}ckstr{\"o}m, Tom and Alku, Paavo},
booktitle=interspeech,
year={2015}
}
  19. Pedersen, Christian Fischer and Bäckström, Tom
    Sparse Time-Frequency Representation of Speech by the Vandermonde Transform
    In Proc. Interspeech: 2248–2252, 2014. 
    @inproceedings{pedersen2014sparse,
title={Sparse Time-Frequency Representation of Speech by the {Vandermonde} Transform},
author={Pedersen, Christian Fischer and B{\"a}ckstr{\"o}m, Tom},
booktitle=interspeech,
pages={2248--2252},
year={2014}
}
  20. Bäckström, Tom, Helmrich, Christian R., Fuchs, Guillaume, Multrus, Markus, and Dietz, Martin
    Linear Prediction Based Audio Coding Using Improved Probability Distribution Estimation
    WO/2014/001,182, 2014. 
    @misc{backstrom2014newarith,
title     = {Linear Prediction Based Audio Coding Using Improved Probability Distribution Estimation},
author = {Bäckström, Tom and Helmrich, Christian R. and Fuchs, Guillaume and Multrus, Markus and Dietz, Martin},
booktitle = {},
note = {WO/2014/001,182},
year = 2014,
}
  21. Bäckström, Tom
    Decorrelating MVDR Filterbanks Using the Non-Uniform Discrete Fourier Transform
    IEEE Signal Process. Lett., 22(4): 479–483, 2014. 
    @article{backstrom2014mvdr,
title={Decorrelating MVDR Filterbanks Using the Non-Uniform Discrete Fourier Transform},
author={Bäckström, Tom},
journal = IEEE_J_SPL,
year = 2014,
volume = 22,
number = 4,
pages = {479--483},
}
  22. Tom Bäckström, Johannes Fischer, and Daniel Boley
    Implementation and Evaluation of the Vandermonde Transform
    In Proc. EUSIPCO, 2014. 
    @inproceedings{backstrom2014implementation,
AUTHOR={Tom Bäckström and Johannes Fischer and Daniel Boley},
TITLE={Implementation and Evaluation of the {Vandermonde} Transform},
BOOKTITLE=eusipco,
ADDRESS={Lisbon, Portugal},
MONTH=sep,
YEAR=2014,
KEYWORDS={time-frequency transforms, decorrelation, Vandermonde matrix, Toeplitz
matrix, speech and audio processing},
ABSTRACT={We have recently presented a time-frequency transform, the Vandermonde
transform, which simultaneously decorrelates the input signal and provides
a frequency-domain representation thereof. While the discrete Fourier
transform also provides a frequency-domain representation, its
decorrelating performance is only approximate. Although this is good enough
for many applications, in applications which require relatively short
windows, such as speech and audio processing, the penalty due to the
approximate decorrelation limits overall performance. This paper focuses on
the practical implementation of the Vandermonde transform. Our purpose is
to provide a short review of state-of-the-art methods, a step-by-step
instructions for implementation and an evaluation of the performance.}
}
  23. Bäckström, Tom and Helmrich, Christian R.
    Decorrelated Innovative Codebooks for ACELP Using Factorization of Autocorrelation Matrix
    In Proc. Interspeech, 2014. 
    @inproceedings{backstrom2014decorrelated,
title={Decorrelated Innovative Codebooks for {ACELP} Using Factorization of Autocorrelation Matrix},
author={B{\"a}ckstr{\"o}m, Tom and Helmrich, Christian R.},
booktitle=interspeech,
year={2014},
}
  24. Bäckström, Tom, Multrus, Markus, Fuchs, Guillaume, Helmirich, Christian, and Dietz, Martin
    An apparatus for encoding a speech signal employing ACELP in the autocorrelation domain
    EP Patent WO2,014,053,261, 2014. 
    @misc{backstrom2014apparatus,
title={An apparatus for encoding a speech signal employing {ACELP} in the autocorrelation domain},
author={Bäckström, Tom and Multrus, Markus and Fuchs, Guillaume and Helmirich, Christian and Dietz, Martin},
year={2014},
month=apr # {~10},
note={EP Patent WO2,014,053,261},
}
  25. Airaksinen, Manu, Bäckström, Tom, and Alku, Paavo
    Automatic estimation of the lip radiation effect in glottal inverse filtering
    In Proc. Interspeech, 2014. 
    @inproceedings{airaksinen2014automatic,
author = {Airaksinen, Manu and Bäckström, Tom and Alku, Paavo},
title = {Automatic estimation of the lip radiation effect in glottal inverse filtering},
booktitle = interspeech,
year = 2014,
month = {September},
}
  26. Vilkamo, Juha, Bäckström, Tom, and Kuntz, Achim
    Optimized Covariance Domain Framework for Time—Frequency Processing of Spatial Audio
    J. Audio. Eng. Soc., 61(6): 403–411, 2013. 
    @article{vilkamo2013optimized,
title={Optimized Covariance Domain Framework for Time--Frequency Processing of Spatial Audio},
author={Vilkamo, Juha and Bäckström, Tom and Kuntz, Achim},
journal=jaes,
volume={61},
number={6},
year={2013},
pages={403--411},
}
  27. Vilkamo, Juha, Bäckström, Tom, Küch, Fabian, and Kuntz, Achim
    Optimal Mixing Matrices and Usage of Decorrelators in Spatial Audio Processing
    WO Patent 2,013,024,085, 2013. 
    @misc{vilkamo2013optimal,
title={Optimal Mixing Matrices and Usage of Decorrelators in Spatial Audio Processing},
author={Vilkamo, Juha and Bäckström, Tom and Küch, Fabian and Kuntz, Achim},
year={2013},
month=feb # {~22},
note={WO Patent 2,013,024,085},
}
  28. Bäckström, Tom
    Vandermonde Factorization of Toeplitz Matrices and Applications in Filtering and Warping
    IEEE Trans. Signal Process., 61(24): 6257–6263, 2013. 
    @article{backstrom2013vandermonde,
title={Vandermonde Factorization of Toeplitz Matrices and Applications in Filtering and Warping},
author={Bäckström, Tom},
journal=IEEE_J_SP,
volume={61},
number={24},
pages={6257--6263},
year={2013},
publisher={IEEE},
}
  29. Bäckström, Tom
    Computationally efficient objective function for algebraic codebook optimization in ACELP
    In Proc. Interspeech, 2013. 
    @inproceedings{backstrom2013computationally,
title={Computationally efficient objective function for algebraic codebook optimization in ACELP},
author={Bäckström, Tom},
booktitle=interspeech,
year={2013},
organization={ISCA},
}
  30. Bäckström, Tom
    Comparison of Windowing in Speech and Audio Coding
    In Proc. WASPAA, 2013. 
    @inproceedings{backstrom2013comparison,
title={Comparison of Windowing in Speech and Audio Coding},
author={Bäckström, Tom},
booktitle=waspaa,
year={2013},
}
  31. Vilkamo, Juha, Bäckström, Tom, and Kuntz, Achim
    Optimal Mixing Matrices and Usage of Decorrelators in Spatial Audio Processing
    In 45th International Conference: Applications of Time-Frequency Processing in Audio, 2012. 
    @inproceedings{vilkamo2012optimal,
title={Optimal Mixing Matrices and Usage of Decorrelators in Spatial Audio Processing},
author={Vilkamo, Juha and Bäckström, Tom and Kuntz, Achim},
booktitle={45th International Conference: Applications of Time-Frequency Processing in Audio},
year={2012},
organization={AES}
}
  32. Ravelli, Emmanuel, Geiger, Ralf, Schnell, Markus, Fuchs, Guillaume, Ruoppila, Vesa, Bäckström, Tom, Grill, Bernhard, and Helmrich, Christian
    Apparatus and Method for Encoding and Decoding an Audio Signal Using an Aligned Look-Ahead Portion
    WO Patent 2,012,110,473, 2012. 
    @misc{ravelli2012apparatus,
title={Apparatus and Method for Encoding and Decoding an Audio Signal Using an Aligned Look-Ahead Portion},
author={Ravelli, Emmanuel and Geiger, Ralf and Schnell, Markus and Fuchs, Guillaume and Ruoppila, Vesa and Bäckström, Tom and Grill, Bernhard and Helmrich, Christian},
year={2012},
month=aug # {~24},
note={WO Patent 2,012,110,473},
}
  33. Kuntz, Achim, Disch, Sascha, and Bäckström, Tom
    Encoding and decoding of slot positions of events in an audio signal frame
    EP Patent 2,477,188, 2012. 
    @misc{kuntz2012encoding,
title={Encoding and decoding of slot positions of events in an audio signal frame},
author={Kuntz, Achim and Disch, Sascha and Bäckström, Tom},
year={2012},
month=jul # {~18},
note={EP Patent 2,477,188},
booktitle = {},
}
  34. Bäckström, Tom
    Enumerative Algebraic Coding for ACELP
    In Proc. Interspeech, 2012. 
    @inproceedings{backstrom2012enumerative,
title={Enumerative Algebraic Coding for ACELP},
author={Bäckström, Tom},
booktitle=interspeech,
year={2012},
}
  35. Bäckström, Tom and Fuchs, Guillaume
    Encoding and Decoding of Pulse Positions of Tracks of an Audio Signal
    WO Patent 2,012,110,416, 2012. 
    @misc{backstrom2012encoding,
title={Encoding and Decoding of Pulse Positions of Tracks of an Audio Signal},
author={Bäckström, Tom and Fuchs, Guillaume},
year={2012},
month=aug # {~24},
note = {WO Patent 2,012,110,416},
}
  36. Neuendorf, Max, Fuchs, Guillaume, Rettelbach, Nikolaus, Bäckström, Tom, Lecomte, Jèrèmie, and Herre, Jürgen
    Multi-Mode Audio Signal Decoder, Multi-Mode Audio Signal Encoder, Methods and Computer Program Using a Linear-Prediction-Coding Based Noise Shaping
    WO Patent WO/2011/042,464, 2011. 
    @misc{neuendorf2011multi,
title={Multi-Mode Audio Signal Decoder, Multi-Mode Audio Signal Encoder, Methods and Computer Program Using a Linear-Prediction-Coding Based Noise Shaping},
author={Neuendorf, Max and Fuchs, Guillaume and Rettelbach, Nikolaus and Bäckström, Tom and Lecomte, J{\`e}r{\`e}mie and Herre, J{\"u}rgen},
year={2011},
month=apr # {~14},
note= {WO Patent WO/2011/042,464},
}
  37. Kuntz, Achim, Disch, Sascha, Bäckström, Tom, and Robilliard, Julien
    The Transient Steering Decorrelator Tool in the Upcoming MPEG Unified Speech and Audio Coding Standard
    In 131st Convention, 2011. 
    @inproceedings{kuntz2011transient,
title={The Transient Steering Decorrelator Tool in the Upcoming MPEG Unified Speech and Audio Coding Standard},
author={Kuntz, Achim and Disch, Sascha and Bäckström, Tom and Robilliard, Julien},
booktitle={131st Convention},
year={2011},
organization={AES}
}
  38. Geiger, Ralf, Schnell, Markus, Fuchs, Guillaume, Ravelli, Emmanuel, Bäckström, Tom, Lecomte, J 'er 'emie, Schmidt, Konstantin, Rettelbach, Nikolaus, Lutzky, Manfred, and Grill, Bernhard
    Low-Delay Unified Speech and Audio Codec
    WO Patent 2,011,147,950, 2011. 
    @misc{geiger2011low,
title={Low-Delay Unified Speech and Audio Codec},
author={Geiger, Ralf and Schnell, Markus and Fuchs, Guillaume and Ravelli, Emmanuel and Bäckström, Tom and Lecomte, J{\'e}r{\'e}mie and Schmidt, Konstantin and Rettelbach, Nikolaus and Lutzky, Manfred and Grill, Bernhard},
year={2011},
month=dec # {~2},
booktitle={},
note={WO Patent 2,011,147,950}
}
  39. Bayer, Stefan, Bäckström, Tom, Geiger, Ralf, Edler, Bernd, Disch, Sascha, and Villemoes, Lars
    Audio Signal Decoder, Audio Signal Encoder, Methods and Computer Program Using a Sampling Rate Dependent Time-Warp Contour Encoding
    WO Patent WO/2011/110,591, 2011. 
    @misc{bayer2011audio2,
title={Audio Signal Decoder, Audio Signal Encoder, Methods and Computer Program Using a Sampling Rate Dependent Time-Warp Contour Encoding},
author={Bayer, Stefan and Bäckström, Tom and Geiger, Ralf and Edler, Bernd and Disch, Sascha and Villemoes, Lars},
year={2011},
month=sep # {~15},
note = {WO Patent WO/2011/110,591},
}
  40. Bayer, Stefan, Bäckström, Tom, Geiger, Ralf, Edler, Bernd, Disch, Sascha, and Villemoes, Lars
    Audio Signal Decoder, Audio Signal Encoder, Method for Decoding and Audio Signal, Method for Encoding and Audio Signal and Computer Program Using a Pitch-Dependent Adaptation of a Coding Context
    WO Patent WO/2011/110,594, 2011. 
    @misc{bayer2011audio,
title={Audio Signal Decoder, Audio Signal Encoder, Method for Decoding and Audio Signal, Method for Encoding and Audio Signal and Computer Program Using a Pitch-Dependent Adaptation of a Coding Context},
author={Bayer, Stefan and Bäckström, Tom and Geiger, Ralf and Edler, Bernd and Disch, Sascha and Villemoes, Lars},
year={2011},
month=sep # {~15},
note = {WO Patent WO/2011/110,594},
}
  41. Alku, Paavo, Bäckström, Tom, and Magi, Carlo
    Generalisation of linear prediction with autocorrelation method
    Electron. Lett., 47(2): 145–147, 2011. 
    @article{alku2011generalisation,
title={Generalisation of linear prediction with autocorrelation method},
author={Alku, Paavo and Bäckström, Tom and Magi, Carlo},
journal=elelett,
volume={47},
number={2},
pages={145--147},
year={2011},
publisher={IET},
}
  42. Bäckström, Tom, Bayer, Stefan, Geiger, Ralf, Neuendorf, Max, and Disch, Sascha
    Apparatus, Method and Computer Program for Obtaining a Parameter Describing a Variation of a Signal Characteristic of a Signal
    WO Patent WO/2010/084,046, 2010. 
    @misc{backstrom2010apparatus,
title={Apparatus, Method and Computer Program for Obtaining a Parameter Describing a Variation of a Signal Characteristic of a Signal},
author={Bäckström, Tom and Bayer, Stefan and Geiger, Ralf and Neuendorf, Max and Disch, Sascha},
year={2010},
month=jul # {~29},
note = {WO Patent WO/2010/084,046}
}
  43. Magi, Carlo, Pohjalainen, Jouni, Bäckström, Tom, and Alku, Paavo
    Stabilised weighted linear prediction
    Speech. Commun., 51(5): 401–411, 2009. 
    @article{magi2009stabilised,
title={Stabilised weighted linear prediction},
author={Magi, Carlo and Pohjalainen, Jouni and Bäckström, Tom and Alku, Paavo},
journal=speechcomm,
volume={51},
number={5},
pages={401--411},
year={2009},
publisher={Elsevier},
}
  44. Magi, Carlo
    Mathematical Methods for Linear Predictive Spectral Modelling of Speech
    PhD Thesis, Helsinki University of Technology, 2009. 
    @phdthesis{magi2009mathematical,
title={Mathematical Methods for Linear Predictive Spectral Modelling of Speech},
author={Magi, Carlo},
editors={Alku, Paavo and Bäckström, Tom and Pohjalainen, Jouni},
year=2009,
publisher={Helsinki University of Technology},
school={Helsinki University of Technology},
note = {Edited post-humously by Alku, Paavo and Bäckström, Tom and Pohjalainen, Jouni},
}
  45. Bäckström, Tom, Bayer, Stefan, and Disch, Sascha
    Pitch variation estimation
    In Proc. Interspeech: 2595–2598, 2009. 
    @inproceedings{backstrom2009pitch,
title={Pitch variation estimation},
author={Bäckström, Tom and Bayer, Stefan and Disch, Sascha},
booktitle=interspeech,
pages={2595--2598},
year={2009}
}
  46. Bäckström, Tom and Disch, Sascha
    Parametric AM/FM decomposition for speech and audio coding
    In Proc. WASPAA: 333–336, 2009. 
    @inproceedings{backstrom2009parametric,
title={Parametric AM/FM decomposition for speech and audio coding},
author={Bäckström, Tom and Disch, Sascha},
booktitle=waspaa,
pages={333--336},
year={2009},
organization={IEEE}
}
  47. Alku, Paavo, Magi, Carlo, and Bäckström, Tom
    Glottal inverse filtering with the closed-phase covariance analysis utilizing mathematical constraints in modelling of the vocal tract
    Logop. Phoniatr. Voco., 34(4): 200–209, 2009. 
    @article{alku2009glottal,
title={Glottal inverse filtering with the closed-phase covariance analysis utilizing mathematical constraints in modelling of the vocal tract},
author={Alku, Paavo and Magi, Carlo and Bäckström, Tom},
journal=logo,
volume={34},
number={4},
pages={200--209},
year={2009},
publisher={Informa UK Ltd.(Informa Healthcare, Taylor \& Francis AS) London, UK},
}
  48. Alku, Paavo, Magi, Carlo, Yrttiaho, Santeri, Bäckström, Tom, and Story, Brad
    Closed phase covariance analysis based on constrained linear prediction for glottal inverse filtering
    J. Acoust. Soc. Am., 125: 3289, 2009. 
    @article{alku2009closed,
title={Closed phase covariance analysis based on constrained linear prediction for glottal inverse filtering},
author={Alku, Paavo and Magi, Carlo and Yrttiaho, Santeri and Bäckström, Tom and Story, Brad},
journal=jasa,
volume={125},
pages={3289},
year={2009},
}
  49. Magi, Carlo, Bäckström, Tom, and Alku, Paavo
    Simple proofs of root locations of two symmetric linear prediction models
    Signal. Process., 88(7): 1894–1897, 2008. 
    @article{magi2008simple,
title={Simple proofs of root locations of two symmetric linear prediction models},
author={Magi, Carlo and Bäckström, Tom and Alku, Paavo},
journal=sigproc,
volume={88},
number={7},
pages={1894--1897},
year={2008},
publisher={Elsevier},
}
  50. Bäckström, Tom
    Fitting Mass-Spring Models to Glottal Flow Estimates
    In ITRW Speech Analysis and Processing for Knowledge Discovery, 2008. 
    @inproceedings{backstrom2008fitting,
title={Fitting Mass-Spring Models to Glottal Flow Estimates},
author={Bäckström, Tom},
booktitle={ITRW Speech Analysis and Processing for Knowledge Discovery},
year={2008},
organization={ISCA}
}
  51. Alku, Paavo, Magi, Carlo, and Bäckström, Tom
    DC-constrained linear prediction for glottal inverse filtering
    In Proc. Interspeech: 2861–2864, 2008. 
    @inproceedings{alku2008dc,
title={DC-constrained linear prediction for glottal inverse filtering},
author={Alku, Paavo and Magi, Carlo and Bäckström, Tom},
booktitle=interspeech,
pages={2861--2864},
year={2008}
}
  52. Magi, Carlo, Bäckström, Tom, and Alku, Paavo
    Stabilised weighted linear prediction-a robust all-pole method for speech processing
    In Proc. Interspeech: 522–525, 2007. 
    @inproceedings{magi2007stabilised,
title={Stabilised weighted linear prediction-a robust all-pole method for speech processing},
author={Magi, Carlo and Bäckström, Tom and Alku, Paavo},
booktitle=interspeech,
pages={522--525},
year={2007}
}
  53. Bäckström, Tom, Magi, Carlo, and Alku, Paavo
    Minimum separation of line spectral frequencies
    IEEE Signal Process. Lett., 14(2): 145–147, 2007. 
    @article{backstrom2007minimum,
title={Minimum separation of line spectral frequencies},
author={Bäckström, Tom and Magi, Carlo and Alku, Paavo},
journal=IEEE_J_SPL,
volume={14},
number={2},
pages={145--147},
year={2007},
publisher={IEEE},
}
  54. Bäckström, Tom and Magi, Carlo
    Effect of white-noise correction on linear predictive coding
    IEEE Signal Process. Lett., 14(2): 148–151, 2007. 
    @article{backstrom2007effect,
title={Effect of white-noise correction on linear predictive coding},
author={Bäckström, Tom and Magi, Carlo},
journal=IEEE_J_SPL,
volume={14},
number={2},
pages={148--151},
year={2007},
publisher={IEEE},
}
  55. Magi, Carlo, Bäckström, Tom, and Alku, Paavo
    Objective and subjective evaluation of seven selected all-pole modelling methods in processing of noise corrupted speech
    In Signal Processing Symposium (NORSIG). Proceedings of the 7th Nordic: 118–121, 2006. 
    @inproceedings{magi2006objective,
title={Objective and subjective evaluation of seven selected all-pole modelling methods in processing of noise corrupted speech},
author={Magi, Carlo and Bäckström, Tom and Alku, Paavo},
booktitle={Signal Processing Symposium (NORSIG). Proceedings of the 7th Nordic},
pages={118--121},
year={2006},
organization={IEEE}
}
  56. Bäckström, Tom and Magi, Carlo
    Properties of line spectrum pair polynomials — A review
    Signal. Process., 86(11): 3286–3298, 2006. 
    @article{backstrom2006properties,
title={Properties of line spectrum pair polynomials -- A review},
author={Bäckström, Tom and Magi, Carlo},
journal=sigproc,
volume={86},
number={11},
pages={3286--3298},
year={2006},
publisher={Elsevier},
}
  57. Bäckström, Tom and Alku, Paavo
    Harmonic All-Pole Modelling for Glottal Inverse Filtering
    In Signal Processing Symposium (NORSIG 2006). Proceedings of the 7th Nordic: 182–185, 2006. 
    @inproceedings{backstrom2006harmonic,
title={Harmonic All-Pole Modelling for Glottal Inverse Filtering},
author={Bäckström, Tom and Alku, Paavo},
booktitle={Signal Processing Symposium (NORSIG 2006). Proceedings of the 7th Nordic},
pages={182--185},
year={2006},
organization={IEEE}
}
  58. Lehto, Laura, Alku, Paavo, Bäckström, Tom, and Vilkman, Erkki
    Voice symptoms of call-centre customer service advisers experienced during a work-day and effects of a short vocal training course
    Logop. Phoniatr. Voco., 30(1): 14–27, 2005. 
    @article{lehto2005voice,
title={Voice symptoms of call-centre customer service advisers experienced during a work-day and effects of a short vocal training course},
author={Lehto, Laura and Alku, Paavo and Bäckström, Tom and Vilkman, Erkki},
journal=logo,
volume={30},
number={1},
pages={14--27},
year={2005},
publisher={Informa UK Ltd UK},
}
  59. Bäckström, Tom, Airas, Matti, Lehto, Laura, and Alku, Paavo
    Objective quality measures for glottal inverse filtering of speech pressure signals
    In Proc. ICASSP: 897–900, 2005. 
    @inproceedings{backstrom2005objective,
title={Objective quality measures for glottal inverse filtering of speech pressure signals},
author={Bäckström, Tom and Airas, Matti and Lehto, Laura and Alku, Paavo},
booktitle=icassp,
pages={897--900},
year={2005}
}
  60. Bäckström, Tom
    Line Spectral Properties of Quadratic Models
    In Proc. EUSIPCO, 2005. 
    @inproceedings{backstrom2005line,
title={Line Spectral Properties of Quadratic Models},
author={Bäckström, Tom},
booktitle=eusipco,
year={2005}
}
  61. Alku, Paavo, Airas, Matti, Bäckström, Tom, and Pulakka, Hannu
    Using group delay function to assess glottal flows estimated by inverse filtering
    Electron. Lett., 41(9): 562–563, 2005. 
    @article{alku2005using,
title={Using group delay function to assess glottal flows estimated by inverse filtering},
author={Alku, Paavo and Airas, Matti and Bäckström, Tom and Pulakka, Hannu},
journal=elelett,
volume={41},
number={9},
pages={562--563},
year={2005},
publisher={IET Digital Library},
}
  62. Alku, Paavo, Airas, Matti, Bäckström, Tom, and Pulakka, Hannu
    Group delay function as a means to assess quality of glottal inverse filtering
    In Ninth European Conference on Speech Communication and Technology, 2005. 
    @inproceedings{alku2005group,
title={Group delay function as a means to assess quality of glottal inverse filtering},
author={Alku, Paavo and Airas, Matti and B{\"a}ckstr{\"o}m, Tom and Pulakka, Hannu},
booktitle={Ninth European Conference on Speech Communication and Technology},
year={2005}
}
  63. Airas, Matti, Pulakka, Hannu, Bäckströmm, Tom, and Alku, Paavo
    A toolkit for voice inverse filtering and parametrisation
    In Proc. Interspeech: 2145–2148, 2005. 
    @inproceedings{airas2005toolkit,
title={A toolkit for voice inverse filtering and parametrisation},
author={Airas, Matti and Pulakka, Hannu and Bäckströmm, Tom and Alku, Paavo},
booktitle=interspeech,
pages={2145--2148},
year={2005}
}
  64. Bäckström, Tom
    Trusting Systems Intelligence
    Helsinki University of Technology: Systems Analysis Laboratory Research Reports, 2004. 
    @inbook{backstrom2004trusting,
title={Trusting Systems Intelligence},
author={Bäckström, Tom},
editors={Raimo P. Hämäläinen and Esa Saarinen},
booktitle={Systems Intelligence -- Discovering a Hidden Competence in Human Action and Organizational Life},
publisher = {Helsinki University of Technology: Systems Analysis Laboratory Research Reports},
volume = {A88},
month = {October},
pages={251},
year={2004}
}
  65. Bäckström, Tom, Alku, Paavo, Paatero, Tuomas, and Kleijn, Bastiaan
    A time-domain interpretation for the LSP decomposition
    IEEE Trans. Speech Audio Process., 12(6): 554–560, 2004. 
    @article{backstrom2004time,
title={A time-domain interpretation for the LSP decomposition},
author={Bäckström, Tom and Alku, Paavo and Paatero, Tuomas and Kleijn, Bastiaan},
journal=IEEE_J_SAP,
volume={12},
number={6},
pages={554--560},
year={2004},
publisher={IEEE},
}
  66. Bäckström, Tom
    Root loci of ill-conditioned linear predictive systems
    In 7th International Conference on Signal Processing (ICSP'04): 117–120, 2004. 
    @inproceedings{backstrom2004root,
title={Root loci of ill-conditioned linear predictive systems},
author={Bäckström, Tom},
booktitle={7th International Conference on Signal Processing (ICSP'04)},
volume={1},
pages={117--120},
year={2004},
organization={IEEE}
}
  67. Bäckström, Tom
    Linear predictive modelling of speech: constraints and line spectrum pair decomposition
    PhD Thesis, Helsinki University of Technology, 2004. 
    @phdthesis{backstrom2004linear,
title={Linear predictive modelling of speech: constraints and line spectrum pair decomposition},
author={Bäckström, Tom},
year={2004},
publisher={Helsinki University of Technology},
school={Helsinki University of Technology},
}
  68. Alku, Paavo and Bäckström, Tom
    Linear predictive method for improved spectral modeling of lower frequencies of speech with small prediction orders
    IEEE Trans. Speech Audio Process., 12(2): 93–99, 2004. 
    @article{alku2004linear1,
title={Linear predictive method for improved spectral modeling of lower frequencies of speech with small prediction orders},
author={Alku, Paavo and Bäckström, Tom},
journal=IEEE_J_SAP,
volume={12},
number={2},
pages={93--99},
year={2004},
publisher={IEEE},
}
  69. Vilkman, Erkki, Lehto, Laura, Bäckström, Tom, and Alku, Paavo
    Vocal Loading of Call Centre Personnel
    In 6th International Conference Advances in Quantitative Laryngology, Voice and Speech Research (AQL 2003), 2003. 
    @inproceedings{vilkman2003vocal,
title={Vocal Loading of Call Centre Personnel},
author={Vilkman, Erkki and Lehto, Laura and Bäckström, Tom and Alku, Paavo},
booktitle={6th International Conference Advances in Quantitative Laryngology, Voice and Speech Research (AQL 2003)},
year={2003}
}
  70. Lehto, Laura, Rantala, Leena, Vilkman, Erkki, Alku, Paavo, and Bäckström, Tom
    Experiences of a short vocal training course for call-centre customer service advisors
    Folia. Phoniatr. Logo., 55(4): 163–176, 2003. 
    @article{lehto2003experiences,
title={Experiences of a short vocal training course for call-centre customer service advisors},
author={Lehto, Laura and Rantala, Leena and Vilkman, Erkki and Alku, Paavo and Bäckström, Tom},
journal=folia,
volume={55},
number={4},
pages={163--176},
year={2003},
publisher={Karger Publishers},
}
  71. Kleijn, W Bastiaan, Bäckström, Tom, and Alku, Paavo
    On line spectral frequencies
    IEEE Signal Process. Lett., 10(3): 75–77, 2003. 
    @article{kleijn2003line,
title={On line spectral frequencies},
author={Kleijn, W Bastiaan and Bäckström, Tom and Alku, Paavo},
journal=IEEE_J_SPL,
volume={10},
number={3},
pages={75--77},
year={2003},
publisher={IEEE},
}
  72. Bäckström, Tom, Brummer, Ville, Kling, Terhi, and Siitonen, Paula
    Systeemiäly! (in English, Systems Intelligence!)
    Helsinki University of Technology, 2003. 
    @book{backstrom2003systeemialy,
title={Systeemiäly! (in English, Systems Intelligence!)},
author={Bäckström, Tom and Brummer, Ville and Kling, Terhi and Siitonen, Paula},
year={2003},
publisher={Helsinki University of Technology}
}
  73. Bäckström, Tom and Alku, Paavo
    On the stability of constrained linear predictive models
    In Proc. ICASSP: VI—285, 2003. 
    @inproceedings{backstrom2003stability,
title={On the stability of constrained linear predictive models},
author={Bäckström, Tom and Alku, Paavo},
booktitle=icassp,
volume={6},
pages={VI--285},
year={2003},
organization={IEEE}
}
  74. Bäckström, Tom
    Root-exchange property of constrained linear predictive models
    In Statistical Signal Processing, 2003 IEEE Workshop on: 90–93, 2003. 
    @inproceedings{backstrom2003root,
title={Root-exchange property of constrained linear predictive models},
author={Bäckström, Tom},
booktitle={Statistical Signal Processing, 2003 IEEE Workshop on},
pages={90--93},
year={2003},
organization={IEEE}
}
  75. Bäckström, Tom and Alku, Paavo
    A constrained linear predictive model with the minimum-phase property
    Signal. Process., 83(10): 2259–2264, 2003. 
    @article{backstrom2003constrained,
title={A constrained linear predictive model with the minimum-phase property},
author={Bäckström, Tom and Alku, Paavo},
journal=sigproc,
volume={83},
number={10},
pages={2259--2264},
year={2003},
publisher={Elsevier},
}
  76. Bäckström, Tom, Lehto, Laura, Alku, Paavo, and Vilkman, Erkki
    Automatic pre-segmentation of running speech improves the robustness of several acoustic voice measures
    Logop. Phoniatr. Voco., 28(3): 101–108, 2003. 
    @article{backstrom2003automatic,
title={Automatic pre-segmentation of running speech improves the robustness of several acoustic voice measures},
author={Bäckström, Tom and Lehto, Laura and Alku, Paavo and Vilkman, Erkki},
journal=logo,
volume={28},
number={3},
pages={101--108},
year={2003},
publisher={Informa UK Ltd UK},
}
  77. Bäckström, Tom and Alku, Paavo
    All-pole modeling technique based on weighted sum of LSP polynomials
    IEEE Signal Process. Lett., 10(6): 180–183, 2003. 
    @article{backstrom2003all,
title={All-pole modeling technique based on weighted sum of LSP polynomials},
author={Bäckström, Tom and Alku, Paavo},
journal=IEEE_J_SPL,
volume={10},
number={6},
pages={180--183},
year={2003},
publisher={IEEE},
}
  78. Alku, Paavo and Bäckström, Tom
    Linear predictive method with low-frequency emphasis
    In Proc. Interspeech, 2003. 
    @inproceedings{alku2003linear,
title={Linear predictive method with low-frequency emphasis},
author={Alku, Paavo and Bäckström, Tom},
booktitle=interspeech,
year={2003}
}
  79. Alku, Paavo and Bäckström, Tom
    All-pole modeling of wide-band speech with symmetric linear prediction
    In Proc. ICASSP: I—152, 2003. 
    @inproceedings{alku2003all,
title={All-pole modeling of wide-band speech with symmetric linear prediction},
author={Alku, Paavo and Bäckström, Tom},
booktitle=icassp,
volume={1},
pages={I--152},
year={2003},
organization={IEEE}
}
  80. Yuan, Zhijian, Bäckström, Tom, and Alku, Paavo
    All-pole Modelling of Noisy Speech with the Weighted Sum of the Line Spectrum Pair
    In 5th Nordic Signal Processing Symposium (NORSIG-2002): 4–7, 2002. 
    @inproceedings{yuan2002all,
title={All-pole Modelling of Noisy Speech with the Weighted Sum of the Line Spectrum Pair},
author={Yuan, Zhijian and Bäckström, Tom and Alku, Paavo},
booktitle={5th Nordic Signal Processing Symposium (NORSIG-2002)},
pages={4--7},
year={2002}
}
  81. Bäckström, Tom, Alku, Paavo, and Kleijn, Bastiaan
    A time domain reformulation of linear prediction equivalent to the LSP decomposition
    In Proc. ICASSP: I—661, 2002. 
    @inproceedings{backstrom2002time2,
title={A time domain reformulation of linear prediction equivalent to the LSP decomposition},
author={Bäckström, Tom and Alku, Paavo and Kleijn, Bastiaan},
booktitle=icassp,
volume={1},
pages={I--661},
year={2002},
organization={IEEE}
}
  82. Bäckström, T, Alku, Paavo, and Vilkman, Erkki
    Time-domain parametrization of the closing phase of glottal airflow waveform from voices over a large intensity range
    IEEE Trans. Speech Audio Process., 10(3): 186–192, 2002. 
    @article{backstrom2002time1,
title={Time-domain parametrization of the closing phase of glottal airflow waveform from voices over a large intensity range},
author={Bäckström, T and Alku, Paavo and Vilkman, Erkki},
journal=IEEE_J_SAP,
volume={10},
number={3},
pages={186--192},
year={2002},
publisher={IEEE},
}
  83. Alku, Paavo, Bäckström, Tom, and Vilkman, Erkki
    Normalized amplitude quotient for parametrization of the glottal flow
    J. Acoust. Soc. Am., 112: 701, 2002. 
    @article{alku2002normalized,
title={Normalized amplitude quotient for parametrization of the glottal flow},
author={Alku, Paavo and Bäckström, Tom and Vilkman, Erkki},
journal=jasa,
volume={112},
pages={701},
year={2002},
}
  84. Alku, Paavo and Bäckström, Tom
    All-pole modeling technique based on the weighted sum of the LSP polynomials
    In Proc. ICASSP, 2002. 
    @inproceedings{alku2002all2,
title={All-pole modeling technique based on the weighted sum of the LSP polynomials},
author={Alku, Paavo and Bäckström, Tom},
booktitle=icassp,
volume={1},
year={2002},
organization={IEEE}
}
  85. Alku, Paavo and Bäckström, Tom
    All-Pole Modeling Of Wide-Band Speech Using Weighted Sum of the LSP Polynomials
    In Seventh International Conference on Spoken Language Processing, 2002. 
    @inproceedings{alku2002all1,
title={All-Pole Modeling Of Wide-Band Speech Using Weighted Sum of the LSP Polynomials},
author={Alku, Paavo and Bäckström, Tom},
booktitle={Seventh International Conference on Spoken Language Processing},
year={2002}
}
  86. Bäckström, Tom, Alku, Paavo, and Vilkman, Erkki
    An Analysis Environment for Studying Effects of Vocal Loading from Continuous Speech
    In 5th International Conference on Advances in Quantitative Laryngoscopy, Voice and Speech Research, 2001. 
    @inproceedings{backstrom2001analysis,
title={An Analysis Environment for Studying Effects of Vocal Loading from Continuous Speech},
author={Bäckström, Tom and Alku, Paavo and Vilkman, Erkki},
booktitle={5th International Conference on Advances in Quantitative Laryngoscopy, Voice and Speech Research},
year={2001}
}
  87. Alku, Paavo, Bäckström, Tom, Vintturi, Juha, and Vilkman, Erkki
    Effects of Prolonged Oral Reading on Spectral Decay of the Glottal Flow
    In 4th International Conference on Advances in Quantitative Laryngoscopy, Voice and Speech Research, 2000. 
    @inproceedings{alku2000effects,
title={Effects of Prolonged Oral Reading on Spectral Decay of the Glottal Flow},
author={Alku, Paavo and B{\"a}ckstr{\"o}m, Tom and Vintturi, Juha and Vilkman, Erkki},
booktitle={4th International Conference on Advances in Quantitative Laryngoscopy, Voice and Speech Research},
year={2000}
}
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