Method for allocating optimal rate for multi-rate multicast transport of multi-view video streams

Abstract

The invention provides a method for allocating the optimal rate for multi-rate multicast transport of multi-view video streams. The idea of the method includes that control for multiple rates and multi-path routes and control for network flow of relay nodes in transport of the multi-view video streams are subjected to joint optimization, and a transport sequence of viewpoints and frames is taken into consideration when the optimal multicast transport path is selected and the video stream transport rates are allocated for the various viewpoints. Accordingly, on the one hand, a proper transport network is searched for each video stream, and distortion of nodes of all users needing the viewpoints is minimized; and on the other hand, requirements of the users on definition of the viewpoints and dependence on decoding among the frames are met simultaneously. Besides, original convex optimization is analyzed and solved by a Lagrange duality method, resources are optimally distributed, and distributed solving operation is facilitated. The method has the advantages that bandwidth resources of the networks can be effectively utilized, integral distortion is minimized for all the users in heterogenous network environments, and high video quality is provided for user sides.

Description

technical field [0001] The present invention relates to an optimal rate allocation method for multi-rate multicast transmission of multi-viewpoint video streams, including the construction of distribution network, selection of user terminal viewpoint, calculation of viewpoint and frame transmission priority, distribution of link rate, multipath Routing and distributed algorithm design and so on. In order to minimize the overall distortion of users in a heterogeneous network environment, combined with multi-rate multi-path routing and network flow control, when the allocated traffic is insufficient, the view and frames within the view are selectively transmitted, and a suitable distribution network and network for each view are sought. transmit traffic. technical background [0002] With the development of technology and the improvement of users' requirements for video quality, multi-view video multicast develops rapidly. Since the data volume of multi-view video is much la...

AI Technical Summary

Problems solved by technology

[0006] Existing network performance optimization schemes mainly focus on end-to-end network resource allocation, and achieve performance optimization by allocating network resources reasonably. How to perform selective transmission when resources are insufficient to transmit the entire viewpoint information

Images