Network coded data segmenting method and video transmission method and device

Abstract

The invention discloses a network coded data segmenting method and a video transmission method and a device. The network coded data segmenting method comprises the following steps: determining the coded data of a target network; acquiring the constrained parameters and the network coding segmenting length parameters in the coded data of the target network; according to a code rate smoothing model, establishing a feasibility discriminating model by referring to the constrained parameters and the network coding segmenting size parameters in the coded data of the target network; discriminating the feasibility of the network coding segmenting length parameters by using the feasibility discriminating model, and acquiring the feasible maximum segmenting length; and segmenting the network coded data according to the feasible maximum segmenting length. The network coded data segmenting method disclosed by the embodiment can discriminate or compute the given network coding segmenting size parameters to acquire the optimal segmenting length which meets the comprehensive conditions of resource constraint and video playing requirements, and further realize the purposes of improving the video playing quality and effective load rate of bandwidth through the optimal segmenting size.

Description

technical field [0001] The invention relates to the technical field of network coding, in particular to a network coding data segmentation method, a video transmission method and a device. Background technique [0002] In recent years, streaming media has become the main form of audio and video services on the Internet due to its intuitive and real-time user experience, and P2P (Peer to Peer, peer-to-peer network) content distribution technology can effectively improve System performance such as video playback quality and network throughput has also become an effective application layer collaborative transmission technology. The core idea of ​​P2P content distribution technology is to achieve peer-to-peer transmission between nodes by sharing the same content caches of different nodes, thereby avoiding bandwidth bottleneck links, balancing network load, and improving system throughput. However, under extreme conditions, P2P streaming media will still cause problems such as ...

AI Technical Summary

Problems solved by technology

[0006] However, the video VBR (Variable Bit Rate, variable bit rate) feature makes the size of the data segment fluctuate randomly, which is not convenient for buffer management and data scheduling, while network coding segmentation is related to various factors such as node buffer, bandwidth, and initial delay. , and directly affects video playback quality and bandwidth payload rate

Moreover, whether it is data segmentation or time segmentation, the existing technology only qualitatively explains the factors affecting the segment length of network coding, and does not give a specific quantitative calculation method for the segment length, so it is difficult to obtain the network coding segment length under limited resources. Precise parameter setting

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