ETR 250 : 20001
Current
The latest, up-to-date edition.
TRANSMISSION AND MULTIPLEXING (TM) - SPEECH COMMUNICATION QUALITY FROM MOUTH TO EAR FOR 3,1 KHZ HANDSET TELEPHONY ACROSS NETWORKS
Hardcopy , PDF
English
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.
Committee |
TM 5
|
DocumentType |
Standard
|
Pages |
208
|
PublisherName |
European Telecommunications Standards Institute
|
Status |
Current
|
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EG 201 377-1 : 1.3.2 | SPEECH AND MULTIMEDIA TRANSMISSION QUALITY (STQ); SPECIFICATION AND MEASUREMENT OF SPEECH TRANSMISSION QUALITY; PART 1: INTRODUCTION TO OBJECTIVE COMPARISON MEASUREMENT METHODS FOR ONE-WAY SPEECH QUALITY ACROSS NETWORKS |
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EG 202 057-2 : 1.3.2 | SPEECH AND MULTIMEDIA TRANSMISSION QUALITY (STQ); USER RELATED QOS PARAMETER DEFINITIONS AND MEASUREMENTS; PART 2: VOICE TELEPHONY, GROUP 3 FAX, MODEM DATA SERVICES AND SMS |
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TR 102 024-7 : 4.1.1 | TELECOMMUNICATIONS AND INTERNET PROTOCOL HARMONIZATION OVER NETWORKS (TIPHON) RELEASE 4; END-TO-END QUALITY OF SERVICE IN TIPHON SYSTEMS; PART 7: DESIGN GUIDE FOR ELEMENTS OF A TIPHON CONNECTION FROM AN END-TO-END SPEECH TRANSMISSION PERFORMANCE POINT OF VIEW |
TR 101 329 : 2.1.1 | TELECOMMUNICATIONS AND INTERNET PROTOCOL HARMONIZATION OVER NETWORKS (TIPHON) - GENERAL ASPECTS OF QUALITY OF SERVICE (QOS) |
TR 101 149 : 1.1.1 | 2-WIRE ANALOGUE VOICE BAND INTERFACES; TERMINAL EQUIPMENT TRANSMITTING VOICE SIGNALS; TEST SIMULATION FOR LEVEL LIMITATION REQUIREMENTS |
TR 101 329-7 : 2.1.1 | TIPHON; DESIGN GUIDE; PART 7: DESIGN GUIDE FOR ELEMENTS OF A TIPHON CONNECTION FROM AN END-TO-END SPEECH TRANSMISSION PERFORMANCE POINT OF VIEW |
ES 201 801 : 1.1.1 | SPEECH PROCESSING, TRANSMISSION AND QUALITY ASPECTS (STQ); TRANSFER OF PERFORMANCE PARAMETERS OF CONNECTIONS ON A PER CALL BASIS; END-TO-END SPEECH TRANSMISSION PERFORMANCE ADDITIONAL NETWORK FEATURE (ANF); SERVICE DESCRIPTION |
EG 201 474 : 1.1.1 | SPEECH PROCESSING, TRANSMISSION AND QUALITY ASPECT (STQ); FUTURE APPROACHES TO SPEECH TRANSMISSION QUALITY ACROSS MULTIPLE INTERCONNECTED NETWORKS |
TR 102 526 : 1.1.1 | SPEECH PROCESSING, TRANSMISSION AND QUALITY ASPECTS (STQ); WIDEBAND TELEPHONY CONSIDERATIONS |
EG 201 050 : 1.2.2 | SPEECH PROCESSING, TRANSMISSION AND QUALITY ASPECTS (STQ) - OVERALL TRANSMISSION PLAN ASPECTS FOR TELEPHONY IN A PRIVATE NETWORK |
EG 202 320 : 1.2.1 | HUMAN FACTORS (HF); DUPLEX UNIVERSAL SPEECH AND TEXT (DUST) COMMUNICATIONS |
ETR 275 : 20001 | TRANSMISSION AND MULTIPLEXING (TM) - CONSIDERATIONS ON TRANSMISSION DELAY AND TRANSMISSION DELAY VALUES FOR COMPONENTS ON CONNECTIONS |
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