Introduction

In this book, first, the conventional subjective test methods such as Absolute Category Rating (ACR) (ITU-R BT.500-13. Recommendation ITU-R BT.500-13: Methodology for the subjective assessment of the quality of television pictures, 2012) and Double Stimulus Impairment Scale (DSIS) (ITU-T Rec. P.910. Recommendation ITU-T P.910: Subjective video quality assessment methods for multimedia applications, 2008) were applied for the assessment of visual quality, and a novel test method Modified-ACR (M-ACR) (A. Singla et al. (Comparison of subjective quality evaluation for HEVC encoded omnidirectional videos at different bit-rates for UHD and FHD resolution, in Proceedings of the on Thematic Workshops of ACM Multimedia. Mountain View, California, USA, 2017) is proposed during the book research. A methodological framework for 360 \({ }^\circ \) video quality assessment is presented in this book. Second, simulator sickness is assessed to investigate the influence of different factors, such as video resolution, bitrate, session duration, and latency on the scores of simulator sickness. A simplified simulator sickness questionnaire is then proposed to assess the symptoms of simulator sickness and is more directed towards 360 \({ }^\circ \) video. Lastly, a correlation between presence, media quality, and simulator sickness is shown.