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Walter Kellermann
Researcher at University of Erlangen-Nuremberg
Publications - 425
Citations - 8239
Walter Kellermann is an academic researcher from University of Erlangen-Nuremberg. The author has contributed to research in topics: Blind signal separation & Adaptive filter. The author has an hindex of 41, co-authored 409 publications receiving 7436 citations. Previous affiliations of Walter Kellermann include Nuance Communications & Agere Systems.
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Proceedings ArticleDOI
The reverb challenge: Acommon evaluation framework for dereverberation and recognition of reverberant speech
Keisuke Kinoshita,Delcroix Marc,Takuya Yoshioka,Tomohiro Nakatani,Armin Sehr,Walter Kellermann,Roland Maas +6 more
TL;DR: A common evaluation framework including datasets, tasks, and evaluation metrics for both speech enhancement and ASR techniques is proposed, which will be used as a common basis for the REVERB (REverberant Voice Enhancement and Recognition Benchmark) challenge.
Journal ArticleDOI
A summary of the REVERB challenge: state-of-the-art and remaining challenges in reverberant speech processing research
Keisuke Kinoshita,Marc Delcroix,Sharon Gannot,Emanuel A. P. Habets,Reinhold Haeb-Umbach,Walter Kellermann,Volker Leutnant,Roland Maas,Tomohiro Nakatani,Bhiksha Raj,Armin Sehr,Takuya Yoshioka +11 more
TL;DR: The REVERB challenge is described, which is an evaluation campaign that was designed to evaluate such speech enhancement and ASR techniques to reveal the state-of-the-art techniques and obtain new insights regarding potential future research directions.
Journal ArticleDOI
A generalization of blind source separation algorithms for convolutive mixtures based on second-order statistics
TL;DR: A general broadband approach to blind source separation (BSS) for convolutive mixtures based on second-order statistics is presented and constraints are obtained which provide a deeper understanding of the internal permutation problem in traditional narrowband frequency-domain BSS.
Journal ArticleDOI
Making Machines Understand Us in Reverberant Rooms: Robustness Against Reverberation for Automatic Speech Recognition
Takuya Yoshioka,Armin Sehr,Marc Delcroix,Keisuke Kinoshita,Roland Maas,Tomohiro Nakatani,Walter Kellermann +6 more
TL;DR: For a number of unexplored but important applications, distant microphones are a prerequisite for extending the availability of speech recognizers as well as enhancing the convenience of existing speech recognition applications.
Proceedings ArticleDOI
Analysis and design of multirate systems for cancellation of acoustical echoes
TL;DR: An analysis of the multirate concept for the echo cancellation problem is presented and the design problem for the frequency-subband concept is examined in more detail and results are presented verifying the efficiency of this method.