Publications by Afsaneh Asaei | EPFL Graph Search

On Compressibility of Neural Network phonological Features for Low Bit Rate Speech Coding

Hervé Bourlard, Milos Cernak, Afsaneh Asaei

Phonological features extracted by neural network have shown interesting potential for low bit rate speech vocoding. The span of phonological features is wider than the span of phonetic features, and thus fewer frames need to be transmitted. Moreover, the ...

2015

On Application Of Non-Negative Matrix Factorization for Ad Hoc Microphone Array Calibration from Incomplete Noisy Distances

Hervé Bourlard, Afsaneh Asaei, Mohammadjavad Taghizadeh

We propose to use non-negative matrix factorization (NMF) to estimate the unknown pairwise distances and reconstruct a distance matrix for microphone array position calibration. We develop new multiplicative update rules for NMF with incomplete input matri ...

2015

Robust Microphone Placement for Source Localization from Noisy Distance Measurements

Hervé Bourlard, Philip Neil Garner, Afsaneh Asaei, Mohammadjavad Taghizadeh, Saeid Haghighatshoar

We propose a novel algorithm to design an optimum array geometry for source localization inside an enclosure. We assume a square-law decay propagation model for the sound acquisition so that the additive noise on the measured source-microphone distances is ...

2015

A New Identity for the Least-square Solution of Overdetermined Set of Linear Equations

Afsaneh Asaei, Mohammadjavad Taghizadeh, Saeid Haghighatshoar

In this paper, we prove a new identity for the least-square solution of an over-determined set of linear equation

Ax=b

, where

A

is an

m\times n

full-rank matrix,

b

is a column-vector of dimension

m

, and

m

(the number of equations) is larger tha ...

2015

Spatial Sound Localization via Multipath Euclidean Distance Matrix Recovery

Hervé Bourlard, Philip Neil Garner, Afsaneh Asaei, Mohammadjavad Taghizadeh, Saeid Haghighatshoar

A novel localization approach is proposed in order to find the position of an individual source using recordings of a single microphone in a reverberant enclosure. The multipath propagation is modeled by multiple virtual microphones as images of the actual ...

Ieee-Inst Electrical Electronics Engineers Inc2015

A New Identity for the Least-square Solution of Overdetermined Set of Linear Equations

Afsaneh Asaei, Mohammadjavad Taghizadeh, Saeid Haghighatshoar

In this paper, we prove a new identity for the least-square solution of an over-determined set of linear equation

Ax=b

, where

A

is an

m\times n

full-rank matrix,

b

is a column-vector of dimension

m

, and

m

(the number of equations) is larger tha ...

Idiap2015

TDOA Matrices: Algebraic Properties and their Application to Robust Denoising with Missing Data

Afsaneh Asaei

Measuring the Time delay of Arrival (TDOA) between a set of sensors is the basic setup for many applications, such as localization or signal beamforming. This paper presents the set of TDOA matrices, which are built from noise-free TDOA measurements, not r ...

Institute of Electrical and Electronics Engineers2015

Posterior-based Sparse Representation for Automatic Speech Recognition

Hervé Bourlard, Afsaneh Asaei, David Imseng, Sara Bahaadini Beigy Zarandi

Posterior features have been shown to yield very good performance in multiple contexts including speech recognition, spoken term detection, and template matching. These days, posterior features are usually estimated at the output of a neural network. More ...

2014

Ad-Hoc Microphone Array Calibration from Partial Distance Measurements

Hervé Bourlard, Philip Neil Garner, Afsaneh Asaei, Mohammadjavad Taghizadeh

We address the problem of ad~hoc microphone array calibration where some of the distances between the microphones can not be measured. The conventional techniques require information about all the distances for accurate reconstruction of the array geometry ...

2014

Ad-Hoc Microphone Array Calibration from Partial Distance Measurements

Hervé Bourlard, Philip Neil Garner, Afsaneh Asaei, Mohammadjavad Taghizadeh

We address the problem of ad hoc microphone array calibration where some of the distances between the microphones can not be measured. The conventional techniques require information about all the distances for accurate reconstruction of the array geometry ...

2014

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On Compressibility of Neural Network phonological Features for Low Bit Rate Speech Coding

On Application Of Non-Negative Matrix Factorization for Ad Hoc Microphone Array Calibration from Incomplete Noisy Distances

Robust Microphone Placement for Source Localization from Noisy Distance Measurements

A New Identity for the Least-square Solution of Overdetermined Set of Linear Equations

Spatial Sound Localization via Multipath Euclidean Distance Matrix Recovery

A New Identity for the Least-square Solution of Overdetermined Set of Linear Equations

TDOA Matrices: Algebraic Properties and their Application to Robust Denoising with Missing Data

Posterior-based Sparse Representation for Automatic Speech Recognition

Ad-Hoc Microphone Array Calibration from Partial Distance Measurements

Ad-Hoc Microphone Array Calibration from Partial Distance Measurements

Spatial Sound Localization via Multipath Euclidean Distance Matrix Recovery

Robust Microphone Placement for Source Localization from Noisy Distance Measurements

On Compressibility of Neural Network phonological Features for Low Bit Rate Speech Coding

On Application Of Non-Negative Matrix Factorization for Ad Hoc Microphone Array Calibration from Incomplete Noisy Distances

A New Identity for the Least-square Solution of Overdetermined Set of Linear Equations

A New Identity for the Least-square Solution of Overdetermined Set of Linear Equations

TDOA Matrices: Algebraic Properties and their Application to Robust Denoising with Missing Data

Ad-Hoc Microphone Array Calibration from Partial Distance Measurements

Posterior-based Sparse Representation for Automatic Speech Recognition

Ad-Hoc Microphone Array Calibration from Partial Distance Measurements