scope:

The devices and usage scenarios of interest herein are Internet video and distribution quality television. The focus is on the quality perceived by the end user.

This Recommendation describes methods to be used for subjective assessment of the audiovisual quality of Internet video and distribution quality. This may include assessment of visual quality only, audio quality only and/or the overall audiovisual quality. This Recommendation may be used to compare audiovisual device performance in multiple environments, and to compare the quality impact of multiple audiovisual devices. It is appropriate for subjective assessment of devices where the quality impact of the device and the material is confounded. It is appropriate for a wide variety of display technologies, including flat screen, 2D, 3D, multi-view and autostereoscopic.

Limitations

This Recommendation does not address the specialized needs of broadcasters and contribution quality television. This Recommendation is not intended to be used in the evaluation of audio-only stimuli alone, but rather audiovisual subjective assessments that may or may not include audio-only sessions. Caution should be taken when examining adaptive streaming impairments, due to the slow variations in quality within one stimulus over a long period of time.