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Control mechanisms to improve the robustness of mpeg-2 based communications over ATM networks

Mécanismes de Régulation pour améliorer la robustesse des communications fondées sur mpeg-2 sur les Réseaux ATM

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Abstract

Audio-visual and other multimedia services are seen as an important source of traffic for ATM networks. Due to the statistical multiplexing schemes used by ATM networks, cells are exposed to delays, jitters and losses. These phenomena affect the quality of the service provided to the video-based applications. In this paper, we introduce a set of control mechanisms at different levels of the protocol architecture. These mechanisms have been particularly tailored to better support MPEG-2-based video communications applications using ATM networks as their underlying transmission mechanism. We show that the use of errorconcealment mechanisms prove more effective when supplemented by a structured set of protocol mechanisms. We study the impact of cell losses on the quality of MPEG-2 video sequences and provide an evaluation of the quality of the decoded video as perceived by the end user. Our results demonstrate the effectiveness of the proposed protocol architecture in improving the quality of service provided to the video application.

Résumé

Les services audiovisuels et multimédias sont considérés comme une source importante de trafic pour les réseaux atm. Les procédés de multiplexage statistique utilisés dans ces réseaux entraînent des retards, gigues et pertes de cellules. Ces phénomènes dégradent la qualité du service fourni aux applications vidéo. L’article introduit un ensemble de mécanismes de régulation à différents niveaux de l’architecture des protocoles. Ces mécanismes ont été spécialement conçus pour améliorer les vidéocommunications fondées sur le codage mpeg-2 lorsqu’elles utilisent des réseaux atm comme support de transmission. Des mécanismes de masquage d’erreurs deviennent plus efficaces lorsqu’ils sont complétés par un ensemble structuré de mécanismes protocolaires. On étudie l’influence des pertes de cellules sur la qualité des séquences vidéo mpeg-2 et on évalue la qualité de la vidéo décodée telle qu’elle est perçue par l’utilisateur final. Les résultats montrent que l’architecture protocolaire proposée améliore efficacement la qualité de service vidéo.

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Authors and Affiliations

  1. Departamento de Informatica, Universidad de Castilla-La Mancha, Campus Universitario, 02071, Albacete, Espagne

    Pedro mCuenca, Antonio Garrido & Francisco Quiles

  2. School of Information Technology and Engineering, University of Ottawasr161 Louis Pasteur St, KIN 6N5, Ottawa, Ontario, Canada

    Luis Orozco-Barbosa

Authors
  1. Pedro mCuenca
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  2. Luis Orozco-Barbosa
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  3. Antonio Garrido
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  4. Francisco Quiles
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Correspondence to Pedro mCuenca, Luis Orozco-Barbosa, Antonio Garrido or Francisco Quiles.

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mCuenca, P., Orozco-Barbosa, L., Garrido, A. et al. Control mechanisms to improve the robustness of mpeg-2 based communications over ATM networks. Ann. Télécommun. 55, 288–301 (2000). https://doi.org/10.1007/BF02994792

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  • DOI: https://doi.org/10.1007/BF02994792

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