Rec. ITU-T P.700 (06/2019) - Calculation of loudness for speech communication
Summary
History
FOREWORD
Table of Contents
Introduction
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Existing loudness model structures
     6.1 Zwicker model for stationary sound
     6.2 Moore and Glasberg model for stationary sound
     6.3 Zwicker and Fastl model for non-stationary sound
     6.4 Glasberg and Moore for non-stationary sound
7 Reasons for a new universal loudness model
8 Loudness model for receiving loudness
     8.1 Recording of speech signals
     8.2 Loudness calculation
9 Loudness model for sending loudness
10 Loudness model for sidetone loudness
11 Loudness model for listener sidetone loudness
Annex A  Validation and test vectors for loudness model implementation
     A.1 Introduction to test vectors for validation
     A.2 Validation of loudness model implementation
          A.2.1 Introduction
          A.2.2 Speech material
          A.2.3 Processing
          A.2.4 Reference results
     A.3 Validation of speech pause detection and loudness model implementation
          A.3.1 Introduction
          A.3.2 Speech material
          A.3.3 Processing
          A.3.4 Reference results
Appendix I  Result of loudness experiment A
     I.1 Introduction to experiment A
     I.2 Subjective experiment
          I.2.1 Subjective loudness function
          I.2.2 Loudness of clean samples
          I.2.3 Loudness of noisy speech samples
     I.3 Comparison results
          I.3.1 Loudness algorithms
          I.3.2 Clean stimuli result
          I.3.3 Noisy speech result
     I.4 Conclusion
Appendix II  Result of loudness experiment B
     II.1 Introduction to loudness experiment B
     II.2 Measurement setup
          C.2.1 Speech sequence
          II.2.2 Handset mode
          II.2.3 Hands-free mode
     II.3 Auditory loudness assessment
          II.3.1 Reference sounds and individual loudness functions
     II.4 Instrumental loudness methods
          II.4.1 Loudness according to Zwicker
          II.4.2 Loudness according to Moore/Glasberg
               II.4.2.1 ANSI S3.4-2007
               II.4.2.2 Loudness for non-stationary sounds – version 2002
               II.4.4.3 Binaural loudness assessment – version 2016
          II.4.3 Temporal aggregation of loudness vs. time
          II.4.4 Binaural loudness summation
     II.5 Auditory results
          II.5.1 Equal reference level
          C.5.2 Equal reference level of arbitrary loudness models
          II.5.3 Comparison of auditory and instrumental results
               II.5.3.1 Handset mode
               II.5.3.2 Hands-free mode
     II.6 Direct loudness model output
          II.6.1 Handset mode
          II.6.2 Hands-free mode
     II.7 Conclusions
Appendix III  Result of loudness experiment C
     III.1 Introduction to loudness experiment C
          III.1.1 Background
          III.1.2 Motivation
          III.1.3 Earlier experiments within the P.Loudness work item
          II.1.4 Historical survey
     III.2 Subjective experiment
          III.2.1 Test design
          III.2.2 Initial level randomization
          III.2.3 Headphone equalization and level adjustment
          III.2.4 Test environment
          III.2.5 Test sequence
          III.2.6 Speech samples
          III.2.7 Assessors and screening
          III.2.8 Instructions and familiarization
          III.2.9 Comments from subjects
     III.3 Results and comparison to ISO 532-1 objective results
          III.3.1 Test results
          III.3.2 Check of impact of initial presentation gain offset
     III.4 Conclusion
Appendix IV  Nominal transmission paths
     IV.1 Nominal receive paths
Bibliography