Search Results for author: Simon Doclo

Found 21 papers, 1 papers with code

Signal-informed DNN-based DOA Estimation combining an External Microphone and GCC-PHAT Features

no code implementations11 Jun 2022 Ulrik Kowalk, Simon Doclo, Joerg Bitzer

Aiming at estimating the direction of arrival (DOA) of a desired speaker in a multi-talker environment using a microphone array, in this paper we propose a signal-informed method exploiting the availability of an external microphone attached to the desired speaker.

Speaker-conditioning Single-channel Target Speaker Extraction using Conformer-based Architectures

no code implementations27 May 2022 Ragini Sinha, Marvin Tammen, Christian Rollwage, Simon Doclo

Target speaker extraction aims at extracting the target speaker from a mixture of multiple speakers exploiting auxiliary information about the target speaker.

Bias Analysis of Spatial Coherence-Based RTF Vector Estimation for Acoustic Sensor Networks in a Diffuse Sound Field

no code implementations19 May 2022 Wiebke Middelberg, Simon Doclo

In this paper, we perform a theoretical bias analysis for the SC-based RTF vector estimation method with multiple external microphones.

3D Single Source Localization Based on Euclidean Distance Matrices

no code implementations18 May 2022 Klaus Brümann, Simon Doclo

A popular approach for 3D source localization using multiple microphones is the steered-response power method, where the source position is directly estimated by maximizing a function of three continuous position variables.

Coherence-Based Frequency Subset Selection For Binaural RTF-Vector-Based Direction of Arrival Estimation for Multiple Speakers

no code implementations18 May 2022 Daniel Fejgin, Simon Doclo

Recently, a method has been proposed to estimate the direction of arrival (DOA) of a single speaker by minimizing the frequency-averaged Hermitian angle between an estimated relative transfer function (RTF) vector and a database of prototype anechoic RTF vectors.

Direction of Arrival Estimation

Deep Multi-Frame MVDR Filtering for Binaural Noise Reduction

no code implementations18 May 2022 Marvin Tammen, Simon Doclo

To improve speech intelligibility and speech quality in noisy environments, binaural noise reduction algorithms for head-mounted assistive listening devices are of crucial importance.

Dictionary-Based Fusion of Contact and Acoustic Microphones for Wind Noise Reduction

no code implementations18 May 2022 Marvin Tammen, XiLin Li, Simon Doclo, Lalin Theverapperuma

In mobile speech communication applications, wind noise can lead to a severe reduction of speech quality and intelligibility.

Speech Enhancement

Training Strategies for Own Voice Reconstruction in Hearing Protection Devices using an In-ear Microphone

no code implementations12 May 2022 Mattes Ohlenbusch, Christian Rollwage, Simon Doclo

In this paper, we apply a deep learning-based bandwidth-extension system to the own voice reconstruction task and investigate different training strategies in order to overcome the limited availability of training data.

Bandwidth Extension

Optimization of a Fixed Virtual Sensing Feedback ANC Controller for In-Ear Headphones with Multiple Loudspeakers

no code implementations7 Oct 2021 Piero Rivera Benois, Reinhild Roden, Matthias Blau, Simon Doclo

In this paper we consider an in-ear headphone equipped with an inner microphone and multiple loudspeakers and we propose an optimization procedure with a convex objective function to derive a fixed multi-loudspeaker ANC controller aiming at minimizing the sound pressure at the ear drum.

Individualized sound pressure equalization in hearing devices exploiting an electro-acoustic model

no code implementations4 Oct 2021 Henning Schepker, Reinhild Rohden, Florian Denk, Birger Kollmeier, Matthias Blau, Simon Doclo

To achieve optimal individualized equalization typically requires knowledge of all transfer functions between the source, the hearing device, and the individual eardrum.

Robust single- and multi-loudspeaker least-squares-based equalization for hearing devices

no code implementations9 Sep 2021 Henning Schepker, Florian Denk, Birger Kollmeier, Simon Doclo

To improve the sound quality of hearing devices, equalization filters can be used that aim at achieving acoustic transparency, i. e., listening with the device in the ear is perceptually similar to the open ear.


Joint Multi-Channel Dereverberation and Noise Reduction Using a Unified Convolutional Beamformer With Sparse Priors

no code implementations3 Jun 2021 Henri Gode, Marvin Tammen, Simon Doclo

To optimize the convolutional filter, the desired speech component is modeled with a time-varying Gaussian model, which promotes the sparsity of the desired speech component in the short-time Fourier transform domain compared to the noisy microphone signals.

Sound Pressure Minimization at the Ear Drum for In-ear ANC Headphones using a Fixed Feedforward Remote Microphone Technique

no code implementations14 May 2021 Piero Rivera Benois, Reinhild Roden, Matthias Blau, Simon Doclo

Based on measured acoustic paths to predict the sound pressure generated by external sources and the headphone at the ear drum, the FIR filter coefficients of the ANC controller are optimized for different sound fields.

Comparison of Binaural RTF-Vector-Based Direction of Arrival Estimation Methods Exploiting an External Microphone

no code implementations11 Apr 2021 Daniel Fejgin, Simon Doclo

In this paper we consider a binaural hearing aid setup, where in addition to the head-mounted microphones an external microphone is available.

Direction of Arrival Estimation

Speaker-conditioned Target Speaker Extraction based on Customized LSTM Cells

no code implementations9 Apr 2021 Ragini Sinha, Marvin Tammen, Christian Rollwage, Simon Doclo

In this paper, we focus on a single-channel target speaker extraction system based on a CNN-LSTM separator network and a speaker embedder network requiring reference speech of the target speaker.

Deep Multi-Frame MVDR Filtering for Single-Microphone Speech Enhancement

1 code implementation20 Nov 2020 Marvin Tammen, Simon Doclo

Multi-frame algorithms for single-microphone speech enhancement, e. g., the multi-frame minimum variance distortionless response (MFMVDR) filter, are able to exploit speech correlation across adjacent time frames in the short-time Fourier transform (STFT) domain.

Speech Enhancement

Improving auditory attention decoding performance of linear and non-linear methods using state-space model

no code implementations2 Apr 2020 Ali Aroudi, Tobias de Taillez, Simon Doclo

In this paper, we investigate a state-space model using correlation coefficients obtained with a small correlation window to improve the decoding performance of the linear and the non-linear AAD methods.


Binaural LCMV Beamforming with Partial Noise Estimation

no code implementations10 May 2019 Nico Gößling, Elior Hadad, Sharon Gannot, Simon Doclo

While the binaural minimum variance distortionless response (BMVDR) beamformer provides a good noise reduction performance and preserves the binaural cues of the desired source, it does not allow to control the reduction of the interfering sources and distorts the binaural cues of the interfering sources and the background noise.

Noise Estimation

Speech Dereverberation Using Nonnegative Convolutive Transfer Function and Spectro temporal Modeling

no code implementations16 Sep 2017 Nasser Mohammadiha, Simon Doclo

This paper presents two single channel speech dereverberation methods to enhance the quality of speech signals that have been recorded in an enclosed space.

Speech Dereverberation

A State-Space Approach to Dynamic Nonnegative Matrix Factorization

no code implementations31 Aug 2017 Nasser Mohammadiha, Paris Smaragdis, Ghazaleh Panahandeh, Simon Doclo

Nonnegative matrix factorization (NMF) has been actively investigated and used in a wide range of problems in the past decade.

Time Series

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