Effect of speech activity parameter on PESQ's predictions in presence of independent and dependent losses
Speech activity factor is one of the important reference signal characteristics, especially when comes to time-varying impairments, like packet loss, etc. This parameter is defined very broadly by the ITU-T Recommendation P.862.3. The impact of this parameter on speech quality is thoroughly investigated from subjective and objective perspective (quality predictions provided by PESQ) in this study/paper. Higher values of the parameter result in higher PESQ sensitivity to loss change as well as PESQs predictions accuracy improvement. Human brain is a bit less sensitive to loss of some parts of words than PESQ.
speech activity parameter reference signal characteristic packet loss speech quality assessment perceptual evaluation of speech quality (pesq)