Investigation of the Relationship between Subjective and Objective Video Quality Metrics for Multiparty Video Calls on Mobile Devices

Dunja Vučić, Lea Skorin-Kapov
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引用次数: 1

Abstract

Today, various solutions and configurations exist for enabling audiovisual communications. One of the main driving forces has been the evolution of the technologies and APIs related to the open source WebRTC standards, enabling browser-to-browser real-time communication with built-in real-time audio and video functions without requiring any plugins. However, given the strict delay and high bandwidth requirements associated with video conferencing services, along with variable mobile network resource availability and limited mobile end user device capabilities, challenges arise in terms of setting and adapting video encoding parameters so as to achieve acceptable end-user perceived quality. In this paper, we extend our previous studies with further exploration of the impact of different video encoding parameters on perceived video quality. Furthermore, we focus on investigating the relationship between subjective video quality ratings and selected objective video quality metrics (namely blurriness and blockiness) to determine to what extent objective metrics correlate with subjective scores in the specific context of multiparty video calls on mobile devices. Our findings, reported based on the results of a user study (n=27), indicate that perceived video quality has very strong and strong correlation with objective blockiness and blurriness values, respectively.
移动设备上多方视频通话主客观视频质量指标关系的研究
今天,有各种各样的解决方案和配置可以实现视听通信。其中一个主要的推动力是与开源WebRTC标准相关的技术和api的发展,使浏览器与浏览器之间的实时通信能够使用内置的实时音频和视频功能,而不需要任何插件。然而,鉴于视频会议业务的严格延迟和高带宽要求,以及移动网络资源可用性的变化和有限的移动终端用户设备能力,在设置和调整视频编码参数以实现可接受的终端用户感知质量方面出现了挑战。在本文中,我们扩展了之前的研究,进一步探讨了不同的视频编码参数对感知视频质量的影响。此外,我们重点研究了主观视频质量评级与选定的客观视频质量指标(即模糊度和块度)之间的关系,以确定在移动设备上多方视频通话的特定背景下,客观指标与主观评分之间的关联程度。我们的研究结果基于用户研究(n=27)的结果,表明感知视频质量分别与客观块度和模糊度值具有很强和很强的相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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