| Vol. 2, No. 1, November 2005 - Art. 3 |
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| A new Approach for the Large Scale Multicast Distribution of Videos |
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by
Christoph Neumann, Vincent Roca (INRIA), Pascal Moniot (STMicroelectronics)
Copyright
Copyright © STMicroelectronics, INRIA, 2005 |
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Abstract
This paper introduces a novel approach, Scalable Video Streaming over ALC (SVSoA), for the streaming of hierarchically encoded videos using multicast IP. It is well suited to the large scale distribution of videos or television programs over the Internet. It is however not suitable for interactive applications such as video-conferencing because of the playing delay it induces. SVSoA relies on Asynchronous Layered Coding (ALC) reliable multicast protocol (RFC 3450) as the underlying transport protocol. ALC was not originally designed for video streaming, but its intelligent use results in the following assets: (1) SVSoA is massively scalable; (2) it is naturally TCP friendly; (3) it is immediately deployable (e.g., it does not rely on any QoS service); (4) it supports clients heterogeneity; (5) it is up to a certain point immune to long bursts of packet losses; and finally (6) it is compatible with any video hierarchical encoding scheme This paper introduces our proposal, the key parameters, and the associated trade-offs. Two experiments, which compare a traditional layered video transmission scheme with our approach, carried out with a full featured implementation of SVSoA and a MPEG-4 video encoded with spatial scalability, confirm its benefits. |
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