Improved ITU-P.563 Non-Intrusive Speech Quality Assessment Method for Covering VOIP Conditions

Voice over internet protocol, and in particular speech quality assessment and prediction, is an active area of research. Many methods have been developed for the quality assessment of the transmitted speech, including intrusive and non-intrusive methods. In general, non-intrusive methods are appropriate for live speech quality assessment. Recently proposed ITU-T standard, P.563, is a non-intrusive method that has been developed for speech quality assessment. However, it is not appropriate for VoIP conditions and yields erroneous results. In this paper, the P.563 is enhanced for accurate speech assessment under VoIP conditions.