Personne

Olivier Verscheure

Publications associées (14)

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Introduction to the Swiss Data Custodian

Marc-Edouard Baptiste Grégoire Schultheiss, Olivier Verscheure

Trust in the use of sensitive data is not nearly widespread. Even though there is no shortage in tools and methods to address the digitisation of our society and industries, the acquisition and access to non-open data represent the greatest challenge. In t ...

2019

Fast keyword detection with sparse time-frequency models

Pascal Frossard, Olivier Verscheure, Effrosyni Kokiopoulou

We address the problem of keyword spotting in continuous speech streams when training and testing conditions can be different. We propose a keyword spotting algorithm based on sparse representation of speech signals in a time-frequency feature space. The t ...

2008

Joint Smoothing and Source Rate Selection for Guaranteed Service Networks

Pascal Frossard, Jean-Yves Le Boudec, Olivier Verscheure

We consider the transmission of variable bit rate (VBR) video over a network offering a guaranteed service such as ATM VBR or the guaranteed service of the IETF. The guaranteed service requires that the flow accepted by the network has to be conforming wit ...

EUSIPCO2001

Optimal smoothing for guaranteed service

Jean-Yves Le Boudec, Olivier Verscheure

2000

We focus on packet video delivery, with an emphasis on the quality of service perceived by the end-user. A video signal passes through several subsystems, such as the source coder, the network and the decoder. Each of these can impair the information, eith ...

1998

Optimal Smoothing for Guaranteed Service

Jean-Yves Le Boudec, Olivier Verscheure

We consider a scenario where multimedia data is sent over a network offering a guaranteed service such as ATM VBR or the guaranteed service of the IETF. A smoothing device writes the stream into a networking device for transmission, possibly with some pre- ...

1998

Voice Service Interworking for PSTN and IP Networks

Jean-Pierre Hubaux, Olivier Verscheure

In recent years, the Internet has proven its ability to carry real-time data, including voice. Today, a small amount of voice traffic has already been diverted from the Public Switched Telephone Network (PSTN) to the Internet. If it expands, this phenomeno ...

1998

A Flexible Rate Control Mechanism for Interactive MPEG-2 Video Services over ATM Networks

Jean-Pierre Hubaux, Olivier Verscheure, Philippe Chabloz

In this paper, we present a new rate control mechanism for delay sensitive MPEG-2 video services over ATM networks. The rate control constraints the video bitstream to respect the three negotiated VBR ATM traffic contract parameters modelled by a dual leak ...

1997

This paper describes an extension of a vision model for video that has been designed to estimate how specific features in moving pictures are rendered as a consequence of a compression process. The resulting model permits to evaluate the distortions on con ...

1997

Reliable Transmission of MPEG-2 VBR Video Streams over New Network Adaptation and ATM Adaptation Layers

Pascal Frossard, Olivier Verscheure

This paper adresses the transmission of VBR MPEG-2 video streams on top of both Network Adaptation (NAL) and ATM Adaptation Layers (AAL) for real-time multimedia applications. The NAL, specific to MPEG-2, provides a selective data protection mechanism base ...

1997