Efficient video multiplexing for delay-sensitive sources based on leaky-bucket characterization

Ayman Ali-Maher Ibrahim; Maher Hamdi; Pierre Rolin

doi:10.1117/12.337398

22 January 1999 Efficient video multiplexing for delay-sensitive sources based on leaky-bucket characterization

Ayman Ali-Maher Ibrahim, Maher Hamdi, Pierre Rolin

Proceedings Volume 3528, Multimedia Systems and Applications; (1999) https://doi.org/10.1117/12.337398
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

We are concerned about the transmission of delay-sensitive Variable Bit Rate Video (VBR) MPEG-2 sources over the Asynchronous Transfer Mode (ATM) networks. VBR sources allow the use of statistical multiplexing in the network to improve bandwidth utilization. In order to allow for an efficient multiplexing in the network, video sources must be well characterized in order to provide a precise estimation of the network resources needed by the source to achieve quality of service (QoS) requirements. The VBR-rt transfer capability defined by the ATM forum and the ITU-T uses two couples of leaky-bucket parameters as traffic descriptors for the VBR traffic: (the Peak Cell Rate, and CDVT) and, (the Sustainable Cell Rate, the Intrinsic Burst Tolerance). In previous works, we have shown that these traffic descriptors are too conservative and could allow only a very poor network utilization. We have also shown that an efficient multiplexing of VBR video sources could be achieved if the source rate distribution is modeled by a Gamma distribution characterized by the source mean rate and variance. We present in this paper an algorithm that allows the translation of the leaky-bucket parameters into the mean rate and variance needed for efficient video multiplexing. Therefore, for a source controlling its rate to be compliant with the leaky bucket parameters, the corresponding maximum rate variance could be estimated thus allowing a more efficient video multiplexing while maintaining QoS requirements.

Citation Download Citation

Ayman Ali-Maher Ibrahim, Maher Hamdi, and Pierre Rolin "Efficient video multiplexing for delay-sensitive sources based on leaky-bucket characterization", Proc. SPIE 3528, Multimedia Systems and Applications, (22 January 1999); https://doi.org/10.1117/12.337398

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KEYWORDS

Video

Multiplexing

Asynchronous transfer mode

Visualization

Tolerancing

Networks

Video coding

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