M00043663
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TRANSMISSION AND MULTIPLEXING (TM) - SPEECH COMMUNICATION QUALITY FROM MOUTH TO EAR FOR 3,1 KHZ HANDSET TELEPHONY ACROSS NETWORKS
European Telecommunications Standards Institute
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Availability date: 11/06/2021
Foreword
Introduction
1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Typical network components and configurations
4.1 Network components
4.2 Network configurations
5 General considerations; individual parameters and combination
effects
6 Individual transmission parameters
6.1 General survey of the individual transmission parameters
6.2 Basic attenuation/frequency response parameters
6.3 Overall, send, receive and circuit loudness ratings
6.4 Sidetone
6.5 Echo and stability
6.6 Transmission time
6.7 Noise and quantizing distortion
6.8 Power handling and non-linear distortion
6.9 Crosstalk
6.10 Effects of time-varying impairments
7 Equipment and systems with special transmission properties
7.1 Echo control devices
7.2 Low bit-rate codecs
7.3 Digital Circuit Multiplication Equipment (DCME)
7.4 Mobile communication systems
7.5 ATM systems
8 Combination effects of impairments on speech communication
quality - background to the ETSI model
8.1 Introduction
8.2 Derivation of the ETSI model
8.3 Estimates of users' reactions given in the ETSI model
8.4 Discussion of ratings and impairment factors in the
ETSI model
8.5 Future up-dating and amendments of the ETSI model
9 A computation model for the overall voice transmission
quality from mouth to ear
9.1 Description of algorithms in the ETSI model
9.2 Comparisons of results from the ETSI model, other
models and subjective tests
9.3 Future verification of the ETSI model
9.4 Application of the ETSI model in transmission planning
9.5 Statistical use of the ETSI-model for quality control
of existing networks: some guidelines
10 Assessment of end-to-end voice transmission performance of
networks
10.1 General
10.2 Assessment of customer opinion
10.3 Objective parameter measurements
Annex A: Impedance strategy in 2-wire networks
Annex B: Noise aspects in understanding overall network
performance
Annex C: Absolute and relative level
Annex D: Technical report on echo cancelling
Annex E: A discussion of subjective tests
Annex F: Some examples of voice transmission quality evaluations
by the ETSI model
Annex G: Consideration of low bit-rate codecs in transmission
planning
Annex H: Transmission Quality of Digital Circuit Multiplication
Equipment (DCME)
Annex J: Usability of telecommunication services; price and
quality considerations
Annex K: Some notes on the verification of the ETSI computation
model
Annex L: Propagation delay and echo control procedures
Annex M: Aspects of voice transmission quality which need further
studies
Annex N: Bibliography
History
Pertains to mouth to ear narrowband (nominally 3,1 kHz) telephony connections via handsets across one or more telecommunications networks of any type, public or private, fixed or mobile.
Published | |
Document Type | Standard |
Status | Current |
Publisher | European Telecommunications Standards Institute |
Pages | |
ISBN | |
Committee | TM 5 |