The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
Ahmed Mehaoua - One of the best experts on this subject based on the ideXlab platform.
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adaptive packet video streaming over ip networks a cross layer approach
IEEE Journal on Selected Areas in Communications, 2005Co-Authors: Toufik Ahmed, Ahmed Mehaoua, Raouf Boutaba, Youssef IraqiAbstract:There is an increasing demand for supporting real-time audiovisual services over next-generation wired and wireless networks. Various link/network characteristics make the deployment of such demanding services more challenging than traditional data applications like e-mail and the Web. These audiovisual applications are bandwidth adaptive but have stringent delay, jitter, and packet loss requirements. Consequently, one of the major requirements for the successful and wide deployment of such services is the efficient transmission of sensitive content (audio, video, image) over a broad range of bandwidth-constrained access networks. These media will be typically compressed according to the emerging ISO/IEC MPEG-4 standard to achieve high bandwidth efficiency and content-based interactivity. MPEG-4 provides an integrated object-oriented representation and coding of natural and synthetic audiovisual content for its manipulation and transport over a broad range of communication infrastructures. In This work, we leverage the characteristics of MPEG-4 and Internet Protocol (IP) differentiated service frameworks, to propose an innovative cross-layer content delivery architecture that is capable of receiving information from the network and adaptively tune transport parameters, bit rates, and QoS mechanisms according to the underlying network conditions. This service-aware IP transport architecture is composed of: 1) an automatic content-level audiovisual object classification model; 2) a reliable application level Framing Protocol with fine-grained TCP-Friendly rate control and adaptive unequal error protection; and 3) a service-level QoS matching/packet tagging algorithm for seamless IP differentiated service delivery. The obtained results demonstrate, that breaking the OSI Protocol layer isolation paradigm and injecting content-level semantic and service-level requirements within the transport and traffic control Protocols, lead to intelligent and efficient support of multimedia services over complex network architectures.
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a bandwidth efficient application level Framing Protocol for h 264 video multicast over wireless lans
Lecture Notes in Computer Science, 2004Co-Authors: Abdelhamid Nafaa, Yassine Hadjadj Aoul, Daniel Negru, Ahmed MehaouaAbstract:Optimizing wireless bandwidth utilization is one of the numerous challenges in wireless IP multimedia systems design. This paper describes and evaluates the performance of a novel Application Level Framing Protocol for efficient transmission of H.264 video over error- prone wireless IP links. The proposed ALF Protocol introduces an innovative loss spreading scheme for video streaming services which is based on (i) a bandwidth-efficient adaptive H.264 video fragmentation and (ii) an unequal-interleaved protection for improving FEC efficiency. Both video fragmentation and interleaving are coordinated in a frame-based granularity providing bounded end-to-end delays. Performance evaluation results show that the proposed Protocol allows graceful video quality degradation over error-prone wireless links while minimizing the overall bandwidth consumption and the end-to-end latency.
L. Zhang - One of the best experts on this subject based on the ideXlab platform.
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A reliable multicast framework for light-weight sessions and application level Framing
IEEE ACM Transactions on Networking, 1997Co-Authors: S. Floyd, V. Jacobson, S. Mccanne, L. ZhangAbstract:This paper describes scalable reliable multicast (SRM), a reliable multicast framework for light-weight sessions and application level Framing. The algorithms of this framework are efficient, robust, and scale well to both very large networks and very large sessions. The SRM framework has been prototyped in wb, a distributed whiteboard application, which has been used on a global scale with sessions ranging from a few to a few hundred participants. The paper describes the principles that have guided the SRM design, including the IP multicast group delivery model, an end-to-end, receiver-based model of reliability, and the application level Framing Protocol model. As with unicast communications, the performance of a reliable multicast delivery algorithm depends on the underlying topology and operational environment. We investigate that dependence via analysis and simulation, and demonstrate an adaptive algorithm that uses the results of previous loss recovery events to adapt the control parameters used for future loss recovery. With the adaptive algorithm, our reliable multicast delivery algorithm provides good performance over a wide range of underlying topologies.
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a reliable multicast framework for light weight sessions and application level Framing
ACM Special Interest Group on Data Communication, 1995Co-Authors: S. Floyd, V. Jacobson, S. Mccanne, L. ZhangAbstract:This paper describes SRM (Scalable Reliable Multicast), a reliable multicast framework for application level Framing and light-weight sessions. The algorithms of this framework are efficient, robust, and scale well to both very large networks and very large sessions. The framework has been prototyped in wb, a distributed whiteboard application, and has been extensively tested on a global scale with sessions ranging from a few to more than 1000 participants. The paper describes the principles that have guided our design, including the IP multicast group delivery model, an end-to-end, receiver-based model of reliability, and the application level Framing Protocol model. As with unicast communications, the performance of a reliable multicast delivery algorithm depends on the underlying topology and operational environment. We investigate that dependence via analysis and simulation, and demonstrate an adaptive algorithm that uses the results of previous loss recovery events to adapt the control parameters used for future loss recovery. With the adaptive algorithm, our reliable multicast delivery algorithm provides good performance over a wide range of underlying topologies.
Abdelhamid Nafaa - One of the best experts on this subject based on the ideXlab platform.
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a bandwidth efficient application level Framing Protocol for h 264 video multicast over wireless lans
Lecture Notes in Computer Science, 2004Co-Authors: Abdelhamid Nafaa, Yassine Hadjadj Aoul, Daniel Negru, Ahmed MehaouaAbstract:Optimizing wireless bandwidth utilization is one of the numerous challenges in wireless IP multimedia systems design. This paper describes and evaluates the performance of a novel Application Level Framing Protocol for efficient transmission of H.264 video over error- prone wireless IP links. The proposed ALF Protocol introduces an innovative loss spreading scheme for video streaming services which is based on (i) a bandwidth-efficient adaptive H.264 video fragmentation and (ii) an unequal-interleaved protection for improving FEC efficiency. Both video fragmentation and interleaving are coordinated in a frame-based granularity providing bounded end-to-end delays. Performance evaluation results show that the proposed Protocol allows graceful video quality degradation over error-prone wireless links while minimizing the overall bandwidth consumption and the end-to-end latency.
S. Floyd - One of the best experts on this subject based on the ideXlab platform.
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A reliable multicast framework for light-weight sessions and application level Framing
IEEE ACM Transactions on Networking, 1997Co-Authors: S. Floyd, V. Jacobson, S. Mccanne, L. ZhangAbstract:This paper describes scalable reliable multicast (SRM), a reliable multicast framework for light-weight sessions and application level Framing. The algorithms of this framework are efficient, robust, and scale well to both very large networks and very large sessions. The SRM framework has been prototyped in wb, a distributed whiteboard application, which has been used on a global scale with sessions ranging from a few to a few hundred participants. The paper describes the principles that have guided the SRM design, including the IP multicast group delivery model, an end-to-end, receiver-based model of reliability, and the application level Framing Protocol model. As with unicast communications, the performance of a reliable multicast delivery algorithm depends on the underlying topology and operational environment. We investigate that dependence via analysis and simulation, and demonstrate an adaptive algorithm that uses the results of previous loss recovery events to adapt the control parameters used for future loss recovery. With the adaptive algorithm, our reliable multicast delivery algorithm provides good performance over a wide range of underlying topologies.
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a reliable multicast framework for light weight sessions and application level Framing
ACM Special Interest Group on Data Communication, 1995Co-Authors: S. Floyd, V. Jacobson, S. Mccanne, L. ZhangAbstract:This paper describes SRM (Scalable Reliable Multicast), a reliable multicast framework for application level Framing and light-weight sessions. The algorithms of this framework are efficient, robust, and scale well to both very large networks and very large sessions. The framework has been prototyped in wb, a distributed whiteboard application, and has been extensively tested on a global scale with sessions ranging from a few to more than 1000 participants. The paper describes the principles that have guided our design, including the IP multicast group delivery model, an end-to-end, receiver-based model of reliability, and the application level Framing Protocol model. As with unicast communications, the performance of a reliable multicast delivery algorithm depends on the underlying topology and operational environment. We investigate that dependence via analysis and simulation, and demonstrate an adaptive algorithm that uses the results of previous loss recovery events to adapt the control parameters used for future loss recovery. With the adaptive algorithm, our reliable multicast delivery algorithm provides good performance over a wide range of underlying topologies.
Yassine Hadjadj Aoul - One of the best experts on this subject based on the ideXlab platform.
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a bandwidth efficient application level Framing Protocol for h 264 video multicast over wireless lans
Lecture Notes in Computer Science, 2004Co-Authors: Abdelhamid Nafaa, Yassine Hadjadj Aoul, Daniel Negru, Ahmed MehaouaAbstract:Optimizing wireless bandwidth utilization is one of the numerous challenges in wireless IP multimedia systems design. This paper describes and evaluates the performance of a novel Application Level Framing Protocol for efficient transmission of H.264 video over error- prone wireless IP links. The proposed ALF Protocol introduces an innovative loss spreading scheme for video streaming services which is based on (i) a bandwidth-efficient adaptive H.264 video fragmentation and (ii) an unequal-interleaved protection for improving FEC efficiency. Both video fragmentation and interleaving are coordinated in a frame-based granularity providing bounded end-to-end delays. Performance evaluation results show that the proposed Protocol allows graceful video quality degradation over error-prone wireless links while minimizing the overall bandwidth consumption and the end-to-end latency.
