Recommendation ITU-T P.913 describes non-interactive subjective assessment methods for evaluating the one-way overall video quality, audio quality and/or audiovisual quality for applications such as Internet video and distribution quality video. These methods can be used for several different purposes including, but not limited to, comparing the quality of multiple devices, comparing the performance of a device in multiple environments, and subjective assessment where the quality impact of the device and the audiovisual material is confounded.