Search Results for author: Ahmed H. Tewfik

Found 18 papers, 5 papers with code

Deep J-Sense: Accelerated MRI Reconstruction via Unrolled Alternating Optimization

1 code implementation2 Mar 2021 Marius Arvinte, Sriram Vishwanath, Ahmed H. Tewfik, Jonathan I. Tamir

Accelerated multi-coil magnetic resonance imaging reconstruction has seen a substantial recent improvement combining compressed sensing with deep learning.

MRI Reconstruction

EQ-Net: A Unified Deep Learning Framework for Log-Likelihood Ratio Estimation and Quantization

no code implementations23 Dec 2020 Marius Arvinte, Ahmed H. Tewfik, Sriram Vishwanath

In this work, we introduce EQ-Net: the first holistic framework that solves both the tasks of log-likelihood ratio (LLR) estimation and quantization using a data-driven method.

Quantization

Speech Recognition using EEG signals recorded using dry electrodes

no code implementations13 Aug 2020 Gautam Krishna, Co Tran, Mason Carnahan, Morgan M Hagood, Ahmed H. Tewfik

In this paper, we demonstrate speech recognition using electroencephalography (EEG) signals obtained using dry electrodes on a limited English vocabulary consisting of three vowels and one word using a deep learning model.

EEG speech-recognition +1

Robust Face Verification via Disentangled Representations

1 code implementation5 Jun 2020 Marius Arvinte, Ahmed H. Tewfik, Sriram Vishwanath

Our architecture uses a contrastive loss termand a disentangled generative model to sample negative pairs.

Adversarial Robustness Face Verification

Molecular Design Using Signal Processing and Machine Learning: Time-Frequency-like Representation and Forward Design

1 code implementation20 Apr 2020 Alain B. Tchagang, Ahmed H. Tewfik, Julio J. Valdés

In all, in this study, we show that the new QM-SP-ML model represents a powerful technique for molecular forward design.

Chemical Physics Materials Science Computational Physics Quantum Physics

Generating EEG features from Acoustic features

no code implementations29 Feb 2020 Gautam Krishna, Co Tran, Mason Carnahan, Yan Han, Ahmed H. Tewfik

In this paper we demonstrate predicting electroencephalograpgy (EEG) features from acoustic features using recurrent neural network (RNN) based regression model and generative adversarial network (GAN).

EEG Generative Adversarial Network +2

EEG based Continuous Speech Recognition using Transformers

no code implementations31 Dec 2019 Gautam Krishna, Co Tran, Mason Carnahan, Ahmed H. Tewfik

In this paper we investigate continuous speech recognition using electroencephalography (EEG) features using recently introduced end-to-end transformer based automatic speech recognition (ASR) model.

Automatic Speech Recognition Automatic Speech Recognition (ASR) +2

Continuous Speech Recognition using EEG and Video

no code implementations16 Dec 2019 Gautam Krishna, Mason Carnahan, Co Tran, Ahmed H. Tewfik

In this paper we investigate whether electroencephalography (EEG) features can be used to improve the performance of continuous visual speech recognition systems.

Automatic Speech Recognition Automatic Speech Recognition (ASR) +4

Improving EEG based Continuous Speech Recognition

no code implementations24 Nov 2019 Gautam Krishna, Co Tran, Mason Carnahan, Yan Han, Ahmed H. Tewfik

In this paper we introduce various techniques to improve the performance of electroencephalography (EEG) features based continuous speech recognition (CSR) systems.

Automatic Speech Recognition Automatic Speech Recognition (ASR) +3

Voice Activity Detection in presence of background noise using EEG

no code implementations8 Nov 2019 Gautam Krishna, Co Tran, Yan Han, Mason Carnahan, Ahmed H. Tewfik

In this paper we demonstrate that performance of voice activity detection (VAD) system operating in presence of background noise can be improved by concatenating acoustic input features with electroencephalography (EEG) features.

Sound Audio and Speech Processing Signal Processing

Spoken Speech Enhancement using EEG

no code implementations13 Sep 2019 Gautam Krishna, Co Tran, Yan Han, Mason Carnahan, Ahmed H. Tewfik

In this paper we demonstrate spoken speech enhancement using electroencephalography (EEG) signals using a generative adversarial network (GAN) based model, gated recurrent unit (GRU) regression based model, temporal convolutional network (TCN) regression model and finally using a mixed TCN GRU regression model.

EEG Generative Adversarial Network +2

State-of-the-art Speech Recognition using EEG and Towards Decoding of Speech Spectrum From EEG

no code implementations14 Aug 2019 Gautam Krishna, Yan Han, Co Tran, Mason Carnahan, Ahmed H. Tewfik

In this paper we first demonstrate continuous noisy speech recognition using electroencephalography (EEG) signals on English vocabulary using different types of state of the art end-to-end automatic speech recognition (ASR) models, we further provide results obtained using EEG data recorded under different experimental conditions.

Audio and Speech Processing Sound

Deep Learning-Based Quantization of L-Values for Gray-Coded Modulation

1 code implementation18 Jun 2019 Marius Arvinte, Sriram Vishwanath, Ahmed H. Tewfik

In this work, a deep learning-based quantization scheme for log-likelihood ratio (L-value) storage is introduced.

Quantization

Advancing Speech Recognition With No Speech Or With Noisy Speech

no code implementations17 Jun 2019 Gautam Krishna, Co Tran, Mason Carnahan, Ahmed H. Tewfik

In this paper we demonstrate end-to-end continuous speech recognition (CSR) using electroencephalography (EEG) signals with no speech signal as input.

Automatic Speech Recognition Automatic Speech Recognition (ASR) +3

Robust End-to-End Speaker Verification Using EEG

no code implementations17 Jun 2019 Yan Han, Gautam Krishna, Co Tran, Mason Carnahan, Ahmed H. Tewfik

In this paper we demonstrate that performance of a speaker verification system can be improved by concatenating electroencephalography (EEG) signal features with speech signal features or only using EEG signal features.

EEG Speaker Verification

Speech Recognition With No Speech Or With Noisy Speech Beyond English

no code implementations17 Jun 2019 Gautam Krishna, Co Tran, Yan Han, Mason Carnahan, Ahmed H. Tewfik

In this paper we demonstrate continuous noisy speech recognition using connectionist temporal classification (CTC) model on limited Chinese vocabulary using electroencephalography (EEG) features with no speech signal as input and we further demonstrate single CTC model based continuous noisy speech recognition on limited joint English and Chinese vocabulary using EEG features with no speech signal as input.

EEG General Classification +2

Deep Log-Likelihood Ratio Quantization

1 code implementation11 Mar 2019 Marius Arvinte, Ahmed H. Tewfik, Sriram Vishwanath

In this work, a deep learning-based method for log-likelihood ratio (LLR) lossy compression and quantization is proposed, with emphasis on a single-input single-output uncorrelated fading communication setting.

Quantization

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