Video quality evaluation and fault diagnosis method aiming at HAS (HTTP Adaptive Streaming)

Abstract

The invention discloses a video quality evaluation and fault diagnosis method aiming at HAS (HTTP Adaptive Streaming). The video quality evaluation and fault diagnosis method aiming at HAS comprises the steps of: carrying out passive type data acquisition and depth packet analysis on an intermediate point or a terminal device of a fixed internet or a mobile internet through an acquisition device, and identifying and tracking an HAS video media stream based on characteristic character strings in the HTTP URL (HTTP Uniform Resource Locator); performing QoS (Quality of Service) index measurement on each video zone in the HAS video media stream; performing correlation analysis and quality scoring on the QoS index of each video zone of the HAS video media stream; performing statistic analysis on quality values of each zone of the HAS video media stream and judging the reasons resulting in an HAS video quality problem. The video quality evaluation and fault diagnosis method aiming at the HAS, disclosed by the invention, scores the quality of the fragment by monitoring the QoS index of the zone of the HAS video media stream and performing correlation analysis on the indexes, and judges whether the HAS video quality fault is caused by a streaming media server, a terminal device or a transmission network.

Description

technical field [0001] The invention belongs to the technical field of video communication and relates to a fault diagnosis method, in particular to a video quality evaluation and fault diagnosis method for HAS. Background technique [0002] With the rapid development of PC-led fixed Internet and smartphone-led mobile Internet, Internet TV, mobile video and multi-screen interactive services based on OTT video technology are developing at an astonishing speed. OTT is the abbreviation of "Over The Top", which means providing services over the network, emphasizing the independence of services from physical networks. OTT video refers to video services based on the HTTP protocol and the open Internet, and its terminals can be smart TVs, computers, set-top boxes, PADs, smart phones, etc. There are two main implementation methods of OTT video: HTTP Progressive Download (HTTP Progressive Download, HPD for short) and HTTP Adaptive Streaming (HTTP Adaptive Streaming, HAS for short). ...

AI Technical Summary

Problems solved by technology

However, because the client fails to send a fragment download request in time, or the Web server fails to respond to the client's request to send video fragments in time, the client cannot obtain the next fragment after the previous fragment has been played. As a result, there is no content to play in its buffer, and there is an obvious card phenomenon

[0016] Situation 5: The performance of the transmission network is poor, and the speed at which the client downloads video fragments is lower than its playback speed; and the scheduling of video fragments between the client and the Web server is not timely enough

This situation will lead to serious underflow of the client buffer, and it takes a long time to wait for the subsequent playback content, resulting in serious card and pause

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