No-reference video quality evaluating method

Abstract

The invention provides a no-reference video quality evaluating method, and aims to solve the problems of low relevance between an objective MOS value and a subjective MOS value output by the conventional method, weak prediction accuracy and weak generalization ability thereof. The method comprises the following steps: extracting blocking effect parameters, blur parameters and code rate parameters of video received by a receiving end; setting motion complexity parameters for the video according to the decoded time domain of the video; outputting the objective MOS value by using an evaluation model which is acquired in advance based on support vector (SV) regression (SVR) according to the blocking effect parameters, the blur parameters, the code rate parameters and the motion complexity parameters; and acquiring higher relevance with the subjective MOS value. On characteristic parameter selection, TS stream parameters are integrated with main sense injury parameters; and the evaluation model determining method adopts a method of the support vector regression. The method is applicable to videos in different resolution ratios, in particular to videos with encoder injury.

Description

technical field [0001] The invention relates to a no-reference video quality evaluation method. Background technique [0002] Existing video quality evaluation methods can be divided into two categories according to different evaluation objects: one is the evaluation of user experience quality (Quality of Experience, hereinafter referred to as QoE); the other is the evaluation of service quality (Quality of Service). , hereinafter referred to as QoS). In digital communication, after the original video (also called undamaged video) passes through the encoder and the transmission channel, what is presented to the user must be damaged, and the sensory quality is definitely not perfect. And according to the different degree of damage, the sensory quality also changes. [0003] In the process of video encoding, transmission, and playback, QoE needs to be evaluated to determine how much damage affects human senses. Among the evaluation methods for QOE, the most reliable method ...

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Problems solved by technology

[0027] In view of the defects and deficiencies in the prior art, the purpose of the present invention is to propose a method for evaluating video quality without reference, which can solve the problem that the correlation between the objective MOS value and the subjective MOS value output in the prior art is not very high and its prediction The problem of very weak accuracy and generalization ability, improve the correlation between no-reference video quality evaluation and subjective MOS value

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