Designing Real-time, Continuous QoE Score Acquisition Techniques for HMD-based 360°VR Video Watching

Watching HMD-based 360° video has become in-creasing popular as a medium for immersive viewing of photo-realistic content. To evaluate subjective video quality, researchers typically prompt users to provide an overall Quality of Experience (QoE) score after viewing a stimulus. However, since users can adjust their viewport throughout a 360°...

Visual Quality of Experience: A Metric-Driven Perspective

Multimedia systems are typically optimized in a way that maximizes users’ satisfaction of using the systems/services. This user satisfaction is what is commonly referred to as Quality of Experience (QoE). For visual media, such as images and videos, the optimization of QoE has meant reducing the visibility of artifacts (e.g. noise or other...

iCaCoT: Interactive camera-based coaching and training

This paper reports on the evaluation of the concept of interactive camera-based coaching and training (iCaCoT), which focuses on using interactive video navigation for coaching and training purposes. The iCaCoT concept leverages tiled streaming technology, which allows users to navigate freely through high-resolution video feeds while minimising...

Measurement of Video Conferencing Libraries using a Test Framework based on Profiling

Video Conferencing systems have become highly popular with the explosion of bandwidth and computing power. This has made high quality video conference possible on embedded hand held devices. This has created an ecosystem of companies developing applications which are powered by video conferencing libraries and a parallel ecosystem of companies...

Analysis of streaming media systems

Multimedia services have been popping up at tremendous speed in recent years. A large number of these multimedia streaming systems are introduced to the consumer market. Internet Service Providers, Telecommunications Operators, Service/Content Providers, and end users are interested in the mechanisms they use, the Quality-of-Experience they...

Optimising the Quality of Experience during Channel Zapping: The Impact of Advertisements during Channel Zapping

Nowadays various digital television services are available. However, the user of these services experiences longer delays than the traditional analog TV while switching from channel to channel. The digital TV operator usually displays a black screen with the channel number during zapping. However, it could be interesting for the TV viewer, if...

Model validation of channel zapping quality

In an earlier paper we showed, that perceived quality of channel zapping is related to the perceived quality of download time of web browsing, as suggested by ITU-T Rec.G.1030. We showed this by performing subjective tests resulting in an excellent fit with a 0.99 correlation. This was what we call a lean forward experiment and gave the rule of...