Search Results for author: Jean-Marie Lemercier

Found 13 papers, 6 papers with code

Diffusion Models for Audio Restoration

no code implementations15 Feb 2024 Jean-Marie Lemercier, Julius Richter, Simon Welker, Eloi Moliner, Vesa Välimäki, Timo Gerkmann

Here, we aim to show that diffusion models can combine the best of both worlds and offer the opportunity to design audio restoration algorithms with a good degree of interpretability and a remarkable performance in terms of sound quality.

Speech Enhancement

Single and Few-step Diffusion for Generative Speech Enhancement

1 code implementation18 Sep 2023 Bunlong Lay, Jean-Marie Lemercier, Julius Richter, Timo Gerkmann

While the performance of usual generative diffusion algorithms drops dramatically when lowering the number of function evaluations (NFEs) to obtain single-step diffusion, we show that our proposed method keeps a steady performance and therefore largely outperforms the diffusion baseline in this setting and also generalizes better than its predictive counterpart.

Denoising Speech Enhancement

Wind Noise Reduction with a Diffusion-based Stochastic Regeneration Model

1 code implementation22 Jun 2023 Jean-Marie Lemercier, Joachim Thiemann, Raphael Koning, Timo Gerkmann

We show that our stochastic regeneration model outperforms other neural-network-based wind noise reduction methods as well as purely predictive and generative models, on a dataset using simulated and real-recorded wind noise.

Diffusion Posterior Sampling for Informed Single-Channel Dereverberation

1 code implementation21 Jun 2023 Jean-Marie Lemercier, Simon Welker, Timo Gerkmann

We present in this paper an informed single-channel dereverberation method based on conditional generation with diffusion models.

On the Behavior of Intrusive and Non-intrusive Speech Enhancement Metrics in Predictive and Generative Settings

no code implementations5 Jun 2023 Danilo de Oliveira, Julius Richter, Jean-Marie Lemercier, Tal Peer, Timo Gerkmann

Since its inception, the field of deep speech enhancement has been dominated by predictive (discriminative) approaches, such as spectral mapping or masking.

Denoising Speech Enhancement

Speech Signal Improvement Using Causal Generative Diffusion Models

no code implementations15 Mar 2023 Julius Richter, Simon Welker, Jean-Marie Lemercier, Bunlong Lay, Tal Peer, Timo Gerkmann

In this paper, we present a causal speech signal improvement system that is designed to handle different types of distortions.

Extending DNN-based Multiplicative Masking to Deep Subband Filtering for Improved Dereverberation

no code implementations1 Mar 2023 Jean-Marie Lemercier, Julian Tobergte, Timo Gerkmann

We demonstrate that the resulting deep subband filtering scheme outperforms multiplicative masking for dereverberation, while leaving the denoising performance virtually the same.

Denoising

StoRM: A Diffusion-based Stochastic Regeneration Model for Speech Enhancement and Dereverberation

2 code implementations22 Dec 2022 Jean-Marie Lemercier, Julius Richter, Simon Welker, Timo Gerkmann

As diffusion models are generative approaches they may also produce vocalizing and breathing artifacts in adverse conditions.

Speech Dereverberation

Analysing Diffusion-based Generative Approaches versus Discriminative Approaches for Speech Restoration

1 code implementation4 Nov 2022 Jean-Marie Lemercier, Julius Richter, Simon Welker, Timo Gerkmann

In this paper, we systematically compare the performance of generative diffusion models and discriminative approaches on different speech restoration tasks.

Bandwidth Extension Speech Denoising +1

Neural Network-augmented Kalman Filtering for Robust Online Speech Dereverberation in Noisy Reverberant Environments

no code implementations6 Apr 2022 Jean-Marie Lemercier, Joachim Thiemann, Raphael Koning, Timo Gerkmann

In this paper, a neural network-augmented algorithm for noise-robust online dereverberation with a Kalman filtering variant of the weighted prediction error (WPE) method is proposed.

Denoising Speech Dereverberation

Customizable End-to-end Optimization of Online Neural Network-supported Dereverberation for Hearing Devices

no code implementations6 Apr 2022 Jean-Marie Lemercier, Joachim Thiemann, Raphael Koning, Timo Gerkmann

This work focuses on online dereverberation for hearing devices using the weighted prediction error (WPE) algorithm.

A neural network-supported two-stage algorithm for lightweight dereverberation on hearing devices

no code implementations6 Apr 2022 Jean-Marie Lemercier, Joachim Thiemann, Raphael Koning, Timo Gerkmann

By deriving new metrics analyzing the dereverberation performance in various time ranges, we confirm that directly optimizing for a criterion at the output of the multi-channel linear filtering stage results in a more efficient dereverberation as compared to placing the criterion at the output of the DNN to optimize the PSD estimation.

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