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Dive into the research topics where Peter Lempel Søndergaard is active.

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Featured researches published by Peter Lempel Søndergaard.


International Journal of Wavelets, Multiresolution and Information Processing | 2012

The Linear Time Frequency Analysis Toolbox

Peter Lempel Søndergaard; Bruno Torrésani; Peter Balazs

The Linear Time Frequency Analysis Toolbox is a MATLAB/Octave toolbox for computational time-frequency analysis. It is intended both as an educational and computational tool. The toolbox provides the basic Gabor, Wilson and MDCT transform along with routines for constructing windows (filter prototypes) and routines for manipulating coefficients. It also provides a bunch of demo scripts devoted either to demonstrating the main functions of the toolbox, or to exemplify their use in specific signal processing applications. In this paper we describe the used algorithms, their mathematical background as well as some signal processing applications.


Advances in Computational Mathematics | 2007

Gabor frames by sampling and periodization

Peter Lempel Søndergaard

By sampling the window of a Gabor frame for


international conference on acoustics, speech, and signal processing | 2013

The ERBlet transform: An auditory-based time-frequency representation with perfect reconstruction

Thibaud Necciari; Peter Balazs; Nicki Holighaus; Peter Lempel Søndergaard


computer music modeling and retrieval | 2013

The Large Time-Frequency Analysis Toolbox 2.0

Zdeněk Průša; Peter Lempel Søndergaard; Nicki Holighaus; Christoph Wiesmeyr; Peter Balazs

L^{2} {\left( \mathbb{R} \right)}


IEEE Transactions on Signal Processing | 2013

Efficient Algorithms for Discrete Gabor Transforms on a Nonseparable Lattice

Christoph Wiesmeyr; Nicki Holighaus; Peter Lempel Søndergaard


workshop on applications of signal processing to audio and acoustics | 2013

A fast Griffin-Lim algorithm

Nathanael Perraudin; Peter Balazs; Peter Lempel Søndergaard

belonging to Feichtinger’s algebra,


IEEE Transactions on Audio, Speech, and Language Processing | 2015

Inversion of auditory spectrograms, traditional spectrograms, and other envelope representations

Remi Julien Blaise Decorsière; Peter Lempel Søndergaard; Ewen N. MacDonald; Torsten Dau


Applied and Computational Harmonic Analysis | 2016

The pole behavior of the phase derivative of the short-time Fourier transform

Peter Balazs; Dominik Bayer; Florent Jaillet; Peter Lempel Søndergaard

S_{0} {\left( \mathbb{R} \right)}


IEEE Transactions on Audio, Speech, and Language Processing | 2017

A Noniterative Method for Reconstruction of Phase From STFT Magnitude

Zdenek Prusa; Peter Balazs; Peter Lempel Søndergaard


Signal Processing | 2016

Reassignment and synchrosqueezing for general time-frequency filter banks, subsampling and processing

Nicki Holighaus; Zdenek Prusa; Peter Lempel Søndergaard

, one obtains a Gabor frame for

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Peter Balazs

Austrian Academy of Sciences

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Nicki Holighaus

Austrian Academy of Sciences

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Torsten Dau

Technical University of Denmark

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Nathanael Perraudin

École Polytechnique Fédérale de Lausanne

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Christoph Wiesmeyr

Austrian Institute of Technology

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Dominik Bayer

Austrian Academy of Sciences

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Zdenek Prusa

Austrian Academy of Sciences

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Ewen N. MacDonald

Technical University of Denmark

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Florent Jaillet

Centre national de la recherche scientifique

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