Rec. ITU-T P.80 (03/1993) … METHODS FOR SUBJECTIVE DETERMINATION OF TRANSMISSION QUALITY
FOREWORD
CONTENTS
1 Introduction
2 Recommended methods
    2.1 Conversion opinion tests
    2.2 Listening opinion tests
    2.3 Interview and survey tests
    2.4 Other tests
Annex A … Conversation-opinion tests
A.1 Test facilities
A.2 Experiment design
A.3 Conversation task
A.4 Test procedure
Annex B … Listening tests - Absolute Category Rating (ACR)
B.1 Source recordings
B.2 Selection of circuit conditions
B.3 Design of experiment
B.4 Listening test procedure
Annex C … Quantal-Response Detectability Tests
Annex D … Degradation Category Rating (DCR) method
D.1 Introduction
D.2 Degradation Category Rating (DCR) procedure
D.3 Statistical analysis
Annex E … The threshold method for comparison of transmission systems with a reference system
E.1 Introduction
E.2 Testing procedure
E.3 Presentation of signals
E.4 Speech sources
E.5 Listening environment
E.6 Listeners
E.7 Reliability
References
Bibliography