Rec. ITU-T P.81 (03/1993) … SUBJECTIVE PERFORMANCE ASSESSMENT OF TELEPHONE-BAND AND WIDEBAND DIGITAL CODECS
FOREWORD
CONTENTS
1 Introduction
2 Source recordings
    2.1 Sending system
    2.2 Speech samples
3 Selection of experiment parameters
    3.1 Codec conditions
    3.2 Reference conditions
4 Experiment design
5 Listening test procedure
    5.1 Receiving system
    5.2 Opinion scales
    5.3 Electrical noise
6 Analysis of results
Annex A … Comparison of different SNR definitions
Annex B … Sets of parameters to determine codec performance
B.1 Narrow-band systems (300-3400 Hz)
B.2 Wideband systems (100-7000 Hz)
References
Bibliography