A scalable video transmission method and device based on a heterogeneous wireless ad hoc network

Abstract

The invention relates to a gradable video transmission method and apparatus based on a heterogeneous wireless ad hoc network. The method comprises the following steps: detecting and collecting, by anad hoc network node in the network, network environment information in real time and uniformly characterizing the network environment information as link quality information; finding a plurality of transmission paths from a sending terminal to a receiving terminal according to the link quality information; performing, by the sending terminal, gradable video encoding in combination with a way-finding result and a link state; and selecting a corresponding path to transmit the encoded videos to the terminal in parallel. According to the gradable video transmission method and apparatus provided bythe invention, in view of a multi-hop wireless network environment, a closed loop multipath transmission strategy is used for feeding back the video receiving condition and the transmission network state of the receiving terminal to the sending terminal in real time, so that the sending terminal can adaptively adjust the path selection mode and guide the gradable video encoding, different modulesare configured by using a gradable video transmission device to effectively solve the problem of unreliable video transmission in the multi-hop wireless network, the base layer videos have relativelyhigh robustness, the enhancement layer videos have relatively high throughput, and the video transmission quality is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wireless video transmission, and in particular relates to a scalable video transmission method and device based on a heterogeneous wireless ad hoc network. Background technique [0002] The wireless heterogeneous network environment is a network environment composed of interconnected and various types of networks. It is composed of a variety of different communication links, networking methods and communication protocols, and integrates various heterogeneous networks. Make full use of the advantages of various network resources to provide users with reliable, efficient and convenient network services. The heterogeneity and complexity of the communication network environment are determined by the heterogeneity, independence and changeability of the heterogeneous network itself, as well as the differences between networks and the mobility of communication nodes. To carry out real-time video communication i...

AI Technical Summary

Problems solved by technology

Its shortcoming is that it divides the video level only from the hardware configuration of the client and the real-time network speed, without considering more network environment factors that affect video transmission; In terms of scalable video coding, no detailed scalable coding strategy is given.

At the same time, in terms of video transmission, this article, like most articles in the existing technology, is based on video transmission between nodes within one hop range, without emphasizing the impact of multi-hop wireless network transmission on video performance

[0005] At present, the multipath routing strategy is considered to be an effective strategy to efficiently solve the problem of unstable network topology and low reliability of real-time information transmission. How to efficiently use multipath routing to solve the problem of scalable video transmission has become a key research of video transmission. direction

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