Обзор передачи и оценок качества восприятия видеоданных при использовании технологии адаптивной передачи видео по протоколу http

Abstract

Introduction: The rise in the number of users and video traffic amount in modern telecommunication networks leads to the idea that the networks already available should be adapted to video transmission. The greatest amount of video traffic is transmitted using «Dynamic Adaptive Streaming over HTTP (DASH)» technology which is based on HTTP protocol. Purpose: Our goal is a survey of HTTP video transmission technologies and Quality-of-Experience estimations in order to choose a methodology of estimating Quality of Experience depending on the limited amount of the available objective characteristics. Results: On the base of a survey of HTTP-based video transmission technologies, we have proposed a three-component model which includes the models of a video content server, a network, and the user equipment. The survey has shown that DASH technology leads to a slight increase in the load on the network as compared to other video streaming technologies. However, the technology is invariant to the network structure due to the usage of HTTP and TCP protocols. DASH technology provides less severe network congestions because the video content is stored on the server in several sets of quality. This approach allows the user equipment to select a certain video quality for particular network conditions. Practical relevance: The obtained results provide a way for a software engineer to make decisions about the appropriateness of using DASH for specific network requirements, and for a network-engineer to estimate video user experience at intermediate network nodes. On the base of this estimation, you can organize control in order to improve the network performance.