Summary

ITU-T Rec. P.862 provides raw scores in the range –0.5 to 4.5. It is desired to provide a MOS-LQO (P.800.1) score from P.862 to allow a linear comparison with MOS. This Recommendation presents the mapping function and its performance for a single mapping from raw P.862 scores to the MOS‑LQO (P.800.1).

This will allow MOS-LQO scores from ITU-T Rec. P.862 to be comparable independent of the implementation of ITU-T Rec. P.862. The given function for transformation presented in this Recommendation has been optimized on a large corpus of subjective data representing different applications and languages.