Overlay network layered multicast resource optimum allocation method for scalable video stream

An overlay network and optimal distribution technology, applied in the direction of digital video signal modification, TV, pulse modulation TV signal transmission, etc., can solve the problem of ignoring the inter-layer dependency of scalable video coding

Inactive Publication Date: 2009-09-30
SHANGHAI UNIV
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Problems solved by technology

Existing rate allocation schemes use network coding technology to improve the throughput of layered multicast, but these schemes mainly focus on maximizing the throu

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  • Overlay network layered multicast resource optimum allocation method for scalable video stream
  • Overlay network layered multicast resource optimum allocation method for scalable video stream
  • Overlay network layered multicast resource optimum allocation method for scalable video stream

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Embodiment Construction

[0058] Preferred embodiments of the present invention will be described in detail below in conjunction with accompanying drawings: the overlay network layered multicast resource optimal allocation method of scalable video streams is characterized in that: first, for the layering of scalable video streams in the overlay network Multicast communication, introduces a new multicast performance measurement method - "layer stretch", which is used to measure the end-to-end delay of each video layer data transmission; second, in order to construct the optimal performance Scalable video stream distribution network, with the overall goal of minimizing the end-to-end layer extension, jointly optimize the network coding of relay nodes, the flow control driven by the receiver, and the multi-path routing strategy, and establish a layered network under the overlay network The optimal allocation model of multicast resources; third, for the above optimal allocation model, the linear programming...

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Abstract

The invention relates to an overlay network layered multicast optimal resource allocation method for a scalable video stream, and provides a new measurement standard for the multicast performance, namely layer extensity which is used for measuring end-to-end time delay of video layers during data distribution aiming at layered multicast communication of the scalable video stream in the overlay network. In order to realize the overall minimization of the layer extensity, the method carries out the combined optimization on the network code of relay nodes, the receiving end driven flow control, and multi-path route strategy, and adopts a linear programming method to establish a layered multicast resource optimum allocation model for the overlay network. On one hand, the method adaptively matches the interlayer dependency of the scalable video code; on the other hand, the method allows a receiving node to decide and regulate the required video quality of own accord. In addition, the invention also provides a distributed heuristic algorithm which has low complexity, approaches the globally optimal solution and is applied to the construction of a scalable video flow distribution network.

Description

technical field [0001] The invention relates to a resource allocation method for data distribution of scalable video streams in an overlay network, including distribution network construction, link rate allocation, multi-path routing design and the like. Combining network coding technology and receiver-driven flow control method to solve the problem of inter-layer dependency of scalable video coding and minimize the delay of data distribution. technical background [0002] When the multicast technology is applied to video content distribution on heterogeneous networks, a key problem to be solved is how to provide a scalable traffic control method for heterogeneous receiving ends. Layered video coding, such as the Scalable Video Coding (SVC, Scalable Video Coding) standard developed by the JVT / MPEG organization, provides a method for rate allocation at the source end. SVC generates a code stream with multi-dimensional scalability through one-time encoding, which not only sat...

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Application Information

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IPC IPC(8): H04N7/24H04N7/26H04L29/06H04N19/30H04N19/36
Inventor 邹君妮李乐扬江璐
Owner SHANGHAI UNIV
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