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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Speech and video telephony terminal acoustic test
specification
(3GPP TS 26.132 version 15.1.0 Release 15)
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3GPP TS 26.132 version 15.1.0 Release 15 1 ETSI TS 126 132 V15.1.0 (2018-10)
Reference
RTS/TSGS-0426132vf10
Keywords
LTE,UMTS
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ETSI
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3GPP TS 26.132 version 15.1.0 Release 15 2 ETSI TS 126 132 V15.1.0 (2018-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 26.132 version 15.1.0 Release 15 3 ETSI TS 126 132 V15.1.0 (2018-10)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 9
Introduction . 9
1 Scope . 10
2 References . 10
3 Definitions, symbols and abbreviations . 12
3.1 Definitions . 12
3.2 Abbreviations . 12
4 Interfaces . 13
5 Test configurations . 14
5.1 Setup for terminals . 14
5.1.1 Setup for handset terminals . 15
5.1.2 Setup for headset terminals . 15
5.1.3 Setup for hands-free terminals . 16
5.1.3.1 Vehicle-mounted hands-free . 16
5.1.3.2 Desktop hands-free. 17
5.1.3.3 Hand-held hands-free . 17
5.1.3.4 Softphone including speakers and microphone . 18
5.1.3.5 Softphone with separate speakers . 20
5.1.4 Position and calibration of HATS . 24
5.1.5 Test setup for quality in the presence of ambient noise measurements . 24
5.1.5.1 Handset . 24
5.1.5.2 Hand-held hands-free . 25
5.2 Setup of the electrical interfaces . 27
5.2.1 Codec approach and specification. 27
5.2.2 Direct digital processing approach . 28
5.3 Accuracy of test equipment . 29
5.4 Test signals . 30
5.5 Void . 31
5.5.1 Void . 31
5.5.2 Void . 31
6 Test conditions . 31
6.1 Environmental conditions . 31
6.1.1 Handset and headset terminals . 31
6.1.2 Hands-free terminals . 31
6.2 System simulator conditions. 32
7 Narrowband telephony transmission performance test methods . 32
7.1 Applicability . 32
7.2 Overall loss/loudness ratings . 32
7.2.1 General . 32
7.2.2 Connections with handset UE . 33
7.2.2.1 Sending loudness rating (SLR) . 33
7.2.2.2 Receiving loudness rating (RLR) . 33
7.2.2.3 Receiving loudness rating (RLR) in the presence of background noise . 33
7.2.3 Connections with desktop and vehicle-mounted hands-free UE. 34
7.2.3.1 Sending loudness rating (SLR) . 34
7.2.3.2 Receiving Loudness Rating (RLR) . 35
7.2.4 Connections with hand-held hands-free UE . 35
7.2.4.1 Sending loudness rating (SLR) . 35
7.2.4.2 Receiving loudness rating (RLR) . 35
ETSI
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3GPP TS 26.132 version 15.1.0 Release 15 4 ETSI TS 126 132 V15.1.0 (2018-10)
7.2.5 Connections with headset UE . 36
7.3 Idle channel noise (handset and headset UE) . 36
7.3.1 Sending . 36
7.3.2 Receiving . 36
7.4 Sensitivity/frequency characteristics . 37
7.4.1 Handset and headset UE sending . 37
7.4.2 Handset and headset UE receiving . 37
7.4.3 Desktop and vehicle-mounted hands-free UE sending . 37
7.4.4 Desktop and vehicle-mounted hands-free UE receiving . 38
7.4.5 Hand-held hands-free UE sending . 38
7.4.6 Hand-held hands-free UE receiving . 38
7.5 Sidetone characteristics . 39
7.5.1 Connections with handset UE . 39
7.5.1.1 void . 39
7.5.1.2 Connections with handset UE – HATS method . 39
7.5.2 Headset UE . 39
7.5.3 Hands-free UE (all categories) . 40
7.5.4 Sidetone delay for handset or headset . 40
7.6 Stability loss . 40
7.7 Acoustic echo control . 41
7.7.1 General . 41
7.7.2 Acoustic echo control in a hands-free UE . 41
7.7.3 Acoustic echo control in handset UE . 42
7.7.4 Acoustic echo control in a headset UE . 42
7.8 Distortion . 42
7.8.1 Sending distortion . 42
7.8.2 Receiving . 43
7.9 Void . 44
7.10 Delay . 45
7.10.0 UE Delay Measurement Methodologies . 45
7.10.1 Delay in sending direction (Handset UE) . 45
7.10.1a Delay in sending direction (headset UE) . 46
7.10.2 Delay in receiving direction (handset UE) . 46
7.10.2a Delay in receiving direction (headset UE) . 47
7.10.3 Delay in sending + receiving direction using "echo" method (handset UE) . 48
7.10.3a Delay in sending + receiving direction using "echo" method (headset UE) . 49
7.10.4 Delay and speech quality in conditions with packet arrival time variations and packet loss . 49
7.10.4.1 Delay in sending direction . 49
7.10.4.2 Delay in receiving direction . 49
7.10.4.3 Speech quality loss in conditions with packet arrival time variations and packet loss . 50
7.10.5 UE send clock accuracy . 51
7.10.6 UE receiving with clock skew . 51
7.11 Echo control characteristics . 51
7.11.1 Test set-up and test signals . 51
7.11.2 Test method . 52
7.11.2.1 Signal alignment . 53
7.11.2.2 Signal level computation and frame classification . 53
7.11.2.3 Classification into categories . 54
7.12 Quality (speech quality, noise intrusiveness) in the presence of ambient noise . 54
7.12.1 Handset . 54
7.12.2 Hand-held hands-free . 56
7.13 Jitter buffer management behaviour . 57
7.13.0 General . 57
7.13.1 Delay histogram . 57
7.13.2 Speech quality loss histogram . 58
8 Wideband telephony transmission performance test methods . 59
8.1 Applicability . 59
8.2 Overall loss/loudness ratings . 59
8.2.1 General . 59
8.2.2 Connections with handset UE . 59
8.2.2.1 Sending loudness rating (SLR) . 59
ETSI
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3GPP TS 26.132 version 15.1.0 Release 15 5 ETSI TS 126 132 V15.1.0 (2018-10)
8.2.2.2 Receiving loudness rating (RLR) . 59
8.2.2.3 Receiving loudness rating (RLR) in the presence of background noise . 60
8.2.3 Connections with desktop and vehicle-mounted hands-free UE. 60
8.2.3.1 Sending loudness rating (SLR) . 60
8.2.3.2 Receiving loudness rating (RLR) . 61
8.2.4 Connections with hand-held hands-free UE . 61
8.2.4.1 Sending loudness rating (SLR) . 61
8.2.4.2 Receiving loudness rating (RLR) . 61
8.2.5 Connections with headset UE . 62
8.3 Idle channel noise (handset and headset UE) . 62
8.3.1 Sending . 62
8.3.2 Receiving . 62
8.4 Sensitivity/frequency characteristics . 63
8.4.1 Handset and headset UE sending . 63
8.4.2 Handset and headset UE receiving . 63
8.4.3 Desktop and vehicle-mounted hands-free UE sending . 63
8.4.4 Desktop and vehicle-mounted hands-free UE receiving . 64
8.4.5 Hand-held hands-free UE sending . 64
8.4.6 Hand-held hands-free UE receiving . 64
8.5 Sidetone characteristics . 65
8.5.1 Connections with handset UE . 65
8.5.2 Headset UE . 65
8.5.3 Hands-free UE (all categories) . 65
8.5.4 Sidetone delay for handset or headset . 65
8.6 Stability loss . 66
8.7 Acoustic echo control . 67
8.7.1 General . 67
8.7.2 Acoustic echo control in a hands-free UE . 67
8.7.3 Acoustic echo control in a handset UE . 68
8.7.4 Acoustic echo control in a headset UE . 68
8.8 Distortion . 68
8.8.1 Sending distortion . 68
8.8.2 Receiving . 69
8.9 Void . 70
8.10 Delay . 71
8.10.0 UE Delay Measurement Methodologies . 71
8.10.1 Delay in sending direction (handset UE) . 71
8.10.1a Delay in sending direction (headset UE) . 72
8.10.2 Delay in receiving direction (handset UE) . 72
8.10.2a Delay in receiving direction (headset UE) . 74
8.10.3 Delay in sending + receiving direction using "echo" method (handset UE) . 74
8.10.3a Delay in sending + receiving direction using "echo" method (headset UE) . 76
8.10.4 Delay and speech quality in conditions with packet arrival time variations and packet loss . 76
8.10.4.1 Delay in sending direction . 76
8.10.4.2 Delay in receiving direction . 76
8.10.4.3
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