Standards:

> ITU-T
ITU-T Recommendation P.800, Methods for subjective determination of transmission quality, 1996

This Recommendation describes methods and procedures for conducting subjective evaluations of transmission quality. The main revision encompassed by this version of this Recommendation is the addition of an annex describing the Comparison Category Rating (CCR) procedure. Other modifications have been made to align this Recommendation with recent revision of Recommendation P.830.

[www.itu.org]