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Quality of Experience Assessment of Video Quality in Social Clouds

机译：社交云中视频质量经验评估的质量

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摘要

Video sharing on social clouds is popular among the users around the world. High-Definition (HD) videos have big file size so the storing in cloud storage and streaming of videos with high quality from cloud to the client are a big problem for service providers. Social clouds compress the videos to save storage and stream over slow networks to provide quality of service (QoS). Compression of video decreases the quality compared to original video and parameters are changed during the online play as well as after download. Degradation of video quality due to compression decreases the quality of experience (QoE) level of end users. To assess the QoE of video compression, we conducted subjective (QoE) experiments by uploading, sharing, and playing videos from social clouds. Three popular social clouds, Facebook, Tumblr, and Twitter, were selected to upload and play videos online for users. The QoE was recorded by using questionnaire given to users to provide their experience about the video quality they perceive. Results show that Facebook and Twitter compressed HD videos more as compared to other clouds. However, Facebook gives a better quality of compressed videos compared to Twitter. Therefore, users assigned low ratings for Twitter for online video quality compared to Tumblr that provided high-quality online play of videos with less compression.
机译：社交云上的视频共享在世界各地的用户中很受欢迎。高清（HD）视频文件大，因此在云存储中存储以及从云到客户端的高质量视频流是服务提供商面临的一个大问题。社交云压缩视频以节省存储空间，并通过慢速网络传输视频以提供服务质量（QoS）。与原始视频相比，视频压缩会降低质量，在线播放期间以及下载后参数都会发生变化。压缩导致的视频质量下降会降低最终用户的体验质量（QoE）。为了评估视频压缩的QoE，我们通过上传、共享和播放社交云中的视频进行了主观（QoE）实验。三种流行的社交云Facebook、Tumblr和Twitter被选中为用户在线上传和播放视频。QoE是通过向用户提供他们对视频质量的体验的问卷记录的。结果显示，与其他云相比，Facebook和Twitter对高清视频的压缩程度更高。然而，与Twitter相比，Facebook提供了更好的压缩视频质量。因此，与Tumblr相比，用户在Twitter上对在线视频质量的评分较低，Tumblr以较少的压缩提供高质量的在线视频播放。

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