ITU-T Rec. P.862 (02/2001) Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech ... Summary Source 1 Introduction 2 Normative references 3 Abbreviations 4 Scope 5 Conventions 6 Overview of PESQ 7 Comparison between objective and subjective scores 7.1 Correlation coefficient 7.2 Residual errors 8 Preparation of processed speech material 8.1 Source material 8.2 Addition of background noise 8.3 Processing through system under test 9 Selection of experimental parameters 10 Description of PESQ algorithm 10.1 Level and time alignment pre-processing (Figure 3) 10.2 Perceptual model (Figures 4a and 4b) ANNEX A - Reference implementation of PESQ and conformance testing