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EL. K.. Canfield-Dafilou, and JO. S.. Abel, "A Group Delay-Based Method for Signal Decorrelation," Paper 9991, (2018 May.). doi: EL. K.. Canfield-Dafilou, and JO. S.. Abel, "A Group Delay-Based Method for Signal Decorrelation," Paper 9991, (2018 May.). doi:
Abstract: By breaking up the phase coherence of a signal broadcast from multiple loudspeakers, it is possible to control the perceived spatial extent and location of a sound source. This so-called signal decorrelation process is commonly achieved using a set of linear filters and finds applications in audio upmixing, spatialization, and auralization. Allpass filters make ideal decorrelation filters since they have unit magnitude spectra and therefore can be perceptually transparent. Here, we present a method for designing allpass decorrelation filters by specifying group delay trajectories in a way that allows for control of the amount of correlation as a function of frequency. This design is efficiently implemented as a cascade of biquad allpass filters. We present statistical and perceptual methods for evaluating the amount of decorrelation and audible distortion.

@article{canfield-dafilou2018a,
author={canfield-dafilou, elliot k. and abel, jonathan s.},
journal={journal of the audio engineering society},
title={a group delay-based method for signal decorrelation},
year={2018},
volume={},
number={},
pages={},
doi={},
month={may},} @article{canfield-dafilou2018a,
author={canfield-dafilou, elliot k. and abel, jonathan s.},
journal={journal of the audio engineering society},
title={a group delay-based method for signal decorrelation},
year={2018},
volume={},
number={},
pages={},
doi={},
month={may},
abstract={by breaking up the phase coherence of a signal broadcast from multiple loudspeakers, it is possible to control the perceived spatial extent and location of a sound source. this so-called signal decorrelation process is commonly achieved using a set of linear filters and finds applications in audio upmixing, spatialization, and auralization. allpass filters make ideal decorrelation filters since they have unit magnitude spectra and therefore can be perceptually transparent. here, we present a method for designing allpass decorrelation filters by specifying group delay trajectories in a way that allows for control of the amount of correlation as a function of frequency. this design is efficiently implemented as a cascade of biquad allpass filters. we present statistical and perceptual methods for evaluating the amount of decorrelation and audible distortion.},}

TY - paper
TI - A Group Delay-Based Method for Signal Decorrelation
SP - EP -
AU - Canfield-Dafilou, Elliot K.
AU - Abel, Jonathan S.
PY - 2018
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2018 TY - paper
TI - A Group Delay-Based Method for Signal Decorrelation
SP - EP -
AU - Canfield-Dafilou, Elliot K.
AU - Abel, Jonathan S.
PY - 2018
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2018
AB - By breaking up the phase coherence of a signal broadcast from multiple loudspeakers, it is possible to control the perceived spatial extent and location of a sound source. This so-called signal decorrelation process is commonly achieved using a set of linear filters and finds applications in audio upmixing, spatialization, and auralization. Allpass filters make ideal decorrelation filters since they have unit magnitude spectra and therefore can be perceptually transparent. Here, we present a method for designing allpass decorrelation filters by specifying group delay trajectories in a way that allows for control of the amount of correlation as a function of frequency. This design is efficiently implemented as a cascade of biquad allpass filters. We present statistical and perceptual methods for evaluating the amount of decorrelation and audible distortion.