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Measuring Colourfulness in Natural Images

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Adaptive joint playout buffer and FEC adjustement for Internet Telephony

Jean-Yves Le Boudec, Catherine Boutremans

We develop a joint playout buffer and Forward Error Correction (FEC) adjustment scheme for Internet Telephony that incorporates the impact of end-to-end delay on the perceived audio quality. We show that it provides a better quality than the adjustment sch ...

2002

Theories and Models for Internet Quality of Service

Jean-Yves Le Boudec

We survey recent advances in theories and models for Internet Quality of Service (QoS). We start with the theory of network calculus, which lays the foundation for support of deterministic performance guarantees in networks, and illustrate its applications ...

2002

Color Handling in Panoramic Photography

Sabine Süsstrunk, David Hasler

Nowadays, the ability to create panoramic photographs is included with most of the commercial digital cameras. The principle is to shoot several pictures and stitch them together to build a panorama. To ensure the quality of the final image, the different ...

2001

Adaptive Delay Aware Error Control for Internet Telephony

Jean-Yves Le Boudec, Catherine Boutremans

Forward Error Correction copes with packet losses, but at the expense of an increase of the end-to-end delay. By failing to take this into account, existing error control schemes for audio often lead to end-to-end delays larger than 150 ms, which has an im ...

2001

Adaptive Delay aware error control for Internet Telephony

Jean-Yves Le Boudec, Catherine Boutremans

2000

Designing new network adaptation and ATM adaptation layers for interactive multimedia applications

Multimedia services, audiovisual applications composed of a combination of discrete and continuous data streams, will be a major part of the traffic flowing in the next generation of high speed networks. The cornerstones for multimedia are Asynchronous Tra ...

EPFL1998

Set theoretic compression with an application to image coding

Martin Vetterli

We show that the complete information that is available after an image has been encoded is not just an approximate quantized image version, but a whole set of consistent images that contains the original image by necessity. From this starting point, we dev ...

1998

Designing New Network Adaptation and ATM Adaptation Layers for Interactive Multimedia Applications

1998

User-Oriented QoS in Packet Video Delivery

Jean-Pierre Hubaux, Olivier Verscheure

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

Towards an Integrated Resource Management Framework: A Challenge for the Future Multimedia Services

Being able to manage the entire chain of resources involved in a communication session is a need for the purposes of future multimedia services, because many of the bottlenecks in communications will move from the network side to the end-systems or third-p ...

1996