Video Quality

Abstract

In this chapter, the different concepts of quality are discussed in order to provide a conceptual basis for video quality in this book. Starting with a general discussion on the possible definitions of quality, three quality concepts used in video processing are reviewed: Quality of Service (QoS), Quality of Perception (QoP) and Quality of Experience (QoE). Based on these concepts, the definition of video quality used in this book is then introduced, followed by an overview of methodologies and requirements to assess video quality subjectively. This overview provides an introduction in the necessary testing environment and common standardised testing methods. It contains explanations for the technical requirements, but also the reasoning behind content selection, rating scales, double and single stimulus methods, and the processing of the results. In doing so, this chapter provides an insight in how to select and adapt testing set-ups for different overall test goals.