Search Results for author: Andreas Brendel

Found 9 papers, 1 papers with code

Simple and Efficient Quantization Techniques for Neural Speech Coding

no code implementations14 May 2024 Andreas Brendel, Nicola Pia, Kishan Gupta, Guillaume Fuchs, Markus Multrus

This discrete representation is typically generated by applying a quantizer to the output of the neural encoder.

Quantization Scheduling

End-To-End Deep Learning-based Adaptation Control for Linear Acoustic Echo Cancellation

1 code implementation4 Jun 2023 Thomas Haubner, Andreas Brendel, Walter Kellermann

To obtain precise echo estimates, the parameters of the echo canceler, i. e., the filter coefficients, need to be estimated quickly and precisely from the observed loudspeaker and microphone signals.

Acoustic echo cancellation

A Unifying View on Blind Source Separation of Convolutive Mixtures based on Independent Component Analysis

no code implementations28 Jul 2022 Andreas Brendel, Thomas Haubner, Walter Kellermann

Most of the currently used algorithms belong to one of the following three families: Frequency Domain ICA (FD-ICA), Independent Vector Analysis (IVA), and TRIple-N Independent component analysis for CONvolutive mixtures (TRINICON).

blind source separation Relation

Microphone Utility Estimation in Acoustic Sensor Networks using Single-Channel Signal Features

no code implementations24 Jan 2022 Michael Günther, Andreas Brendel, Walter Kellermann

In this contribution, we provide a comprehensive analysis of model-based microphone utility estimation approaches that use signal features and, as an alternative, also propose machine learning-based estimation methods that identify optimal sensor signal utility features.

Manifold learning-supported estimation of relative transfer functions for spatial filtering

no code implementations5 Oct 2021 Andreas Brendel, Johannes Zeitler, Walter Kellermann

Many spatial filtering algorithms used for voice capture in, e. g., teleconferencing applications, can benefit from or even rely on knowledge of Relative Transfer Functions (RTFs).

Audio Signal Processing

End-To-End Deep Learning-Based Adaptation Control for Frequency-Domain Adaptive System Identification

no code implementations2 Jun 2021 Thomas Haubner, Andreas Brendel, Walter Kellermann

We present a novel end-to-end deep learning-based adaptation control algorithm for frequency-domain adaptive system identification.

Density Estimation

Online Acoustic System Identification Exploiting Kalman Filtering and an Adaptive Impulse Response Subspace Model

no code implementations7 May 2021 Thomas Haubner, Andreas Brendel, Walter Kellermann

The proposed method assumes that the variability of AIRs of an acoustic scene is confined to a low-dimensional manifold which is embedded in a high-dimensional space of possible AIR estimates.

A Synergistic Kalman- and Deep Postfiltering Approach to Acoustic Echo Cancellation

no code implementations16 Dec 2020 Thomas Haubner, Mhd. Modar Halimeh, Andreas Brendel, Walter Kellermann

We introduce a synergistic approach to double-talk robust acoustic echo cancellation combining adaptive Kalman filtering with a deep neural network-based postfilter.

Acoustic echo cancellation

Faster IVA: Update Rules for Independent Vector Analysis based on Negentropy and the Majorize-Minimize Principle

no code implementations20 Mar 2020 Andreas Brendel, Walter Kellermann

Algorithms for Blind Source Separation (BSS) of acoustic signals require efficient and fast converging optimization strategies to adapt to nonstationary signal statistics and time-varying acoustic scenarios.

blind source separation

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