ETSI TS 126 132 V8.0.0 (2009-01) Technical Specification Universal Mobile Telecommunications System (UMTS); LTE; Speech and video telephony terminal acoustic test specification (3GPP TS 26.132 version 8.0.0 Release 8) 3GPP TS 26.132 version 8.0.0 Release 8 1 ETSI TS 126 132 V8.0.0 (2009-01) Reference RTS/TSGS-0426132v800 Keywords LTE, UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). 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DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE™ is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI 3GPP TS 26.132 version 8.0.0 Release 8 2 ETSI TS 126 132 V8.0.0 (2009-01) Intellectual Property Rights IPRs essential or potentially essential to the present document 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 (http://webapp.etsi.org/IPR/home.asp). 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. 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 http://webapp.etsi.org/key/queryform.asp. ETSI 3GPP TS 26.132 version 8.0.0 Release 8 3 ETSI TS 126 132 V8.0.0 (2009-01) Contents Intellectual Property Rights................................................................................................................................2 Foreword.............................................................................................................................................................2 Foreword.............................................................................................................................................................6 Introduction........................................................................................................................................................6 1 Scope........................................................................................................................................................7 2 References................................................................................................................................................7 3 Definitions, symbols and abbreviations...................................................................................................8 3.1 Definitions..........................................................................................................................................................8 3.2 Abbreviations.....................................................................................................................................................8 4 Interfaces..................................................................................................................................................9 5 Test configurations...................................................................................................................................9 5.1 Setup for terminals.............................................................................................................................................9 5.1.1 Setup for handset terminals.........................................................................................................................10 5.1.2 Setup for headset terminals.........................................................................................................................10 5.1.3 Setup for hands-free terminals....................................................................................................................11 5.1.3.1 Vehicle mounted hands-free..................................................................................................................11 5.1.3.2 Desktop mounted hands-free.................................................................................................................12 5.1.3.3 Handheld hands-free.............................................................................................................................12 5.1.4 Position and calibration of HATS...............................................................................................................14 5.2 Setup of the electrical interfaces.......................................................................................................................14 5.2.1 Codec approach and specification...............................................................................................................14 5.2.2 Direct digital processing approach..............................................................................................................15 5.3 Accuracy of test equipment..............................................................................................................................15 5.4 Test signals.......................................................................................................................................................16 5.5 Additional setup for wideband testing..............................................................................................................16 5.5.1 Setup for handsets and headsets..................................................................................................................16 5.5.2 Additional test setup for handsfree function with softphone UE................................................................17 5.5.2.1 Softphone including speakers and microphone.......................................................................................18 5.5.2.2 Softphone with separate speakers............................................................................................................20 6 Test conditions.......................................................................................................................................23 6.1 Environmental conditions.................................................................................................................................23 6.1.1 Handset and headset terminals....................................................................................................................23 6.1.2 Hands-free terminals..................................................................................................................................23 6.2 System Simulator conditions............................................................................................................................24 7 Narrow-band telephony transmission performance test methods...........................................................24 7.1 Applicability.....................................................................................................................................................24 7.2 Overall loss/loudness ratings............................................................................................................................24 7.2.1 General........................................................................................................................................................24 7.2.2 Connections with handset UE.....................................................................................................................25 7.2.2.1 Sending Loudness Rating (SLR)...........................................................................................................25 7.2.2.2 Receiving Loudness Rating (RLR).......................................................................................................25 7.2.3 Connections with Vehicle Mounted & Desk-Top hands-free UE...............................................................25 7.2.3.1 Sending Loudness Rating (SLR)...........................................................................................................25 7.2.3.2 Receiving Loudness Rating (RLR).......................................................................................................26 7.2.4 Connections with Handheld hands-free UE................................................................................................26 7.2.4.1 Sending Loudness Rating (SLR)...........................................................................................................26 7.2.4.2 Receiving Loudness Rating (RLR).......................................................................................................27 7.2.5 Connections with headset UE.....................................................................................................................27 7.3 Idle channel noise (handset and headset UE)...................................................................................................27 7.3.1 Sending.......................................................................................................................................................27 7.3.2 Receiving....................................................................................................................................................27 ETSI 3GPP TS 26.132 version 8.0.0 Release 8 4 ETSI TS 126 132 V8.0.0 (2009-01) 7.4 Sensitivity/frequency characteristics................................................................................................................28 7.4.1 Handset UE sending...................................................................................................................................28 7.4.2 Handset UE receiving................................................................................................................................28 7.4.3 Vehicle Mounted & Desk-Top hands-free UE sending..............................................................................28 7.4.4 Vehicle Mounted & Desk-Top hands-free UE receiving............................................................................29 7.4.5 Hand-Held hands-free UE sending.............................................................................................................29 7.4.6 Hand-Held hands-free UE receiving...........................................................................................................29 7.5 Sidetone characteristics....................................................................................................................................29 7.5.1 Connections with Handset UE....................................................................................................................29 7.5.1.1 Connections with Handset UE – LRGP method.......................................................................................30 7.5.1.2 Connections with Handset UE – HATS method......................................................................................30 7.5.2 Headset UE.................................................................................................................................................30 7.5.3 Hands-free UE (all categories)....................................................................................................................30 7.6 Stability loss.....................................................................................................................................................30 7.7 Acoustic echo control.......................................................................................................................................31 7.7.1 General........................................................................................................................................................31 7.7.2 Acoustic echo control in a Hands-free UE.................................................................................................31 7.7.3 Acoustic echo control in a handset UE.......................................................................................................32 7.7.4 Acoustic echo control in a headset UE.......................................................................................................32 7.8 Distortion..........................................................................................................................................................33 7.8.1 Sending Distortion......................................................................................................................................33 7.8.2 Receiving....................................................................................................................................................34 7.9 Ambient Noise Rejection.................................................................................................................................34 8 Wideband telephony transmission performance test methods...............................................................35 8.1 Applicability.....................................................................................................................................................35 8.2 Overall loss/loudness ratings............................................................................................................................35 8.2.1 General........................................................................................................................................................35 8.2.2 Connections with handset UE.....................................................................................................................36 8.2.2.1 Sending Loudness Rating (SLR)...........................................................................................................36 8.2.2.2 Receiving Loudness Rating (RLR).......................................................................................................36 8.2.3 Connections with Vehicle Mounted & Desktop Mounted hands-free UE..................................................36 8.2.3.1 Sending Loudness Rating (SLR)...........................................................................................................36 8.2.3.2 Receiving Loudness Rating (RLR).......................................................................................................37 8.2.4 Connections with Handheld hands-free UE................................................................................................37 8.2.4.1 Sending Loudness Rating (SLR)...........................................................................................................37 8.2.4.2 Receiving Loudness Rating (RLR).......................................................................................................38 8.2.5 Connections with headset UE.....................................................................................................................38 8.3 Idle channel noise (handset and headset UE)...................................................................................................38 8.3.1 Sending.......................................................................................................................................................38 8.3.2 Receiving....................................................................................................................................................38 8.4 Sensitivity/frequency characteristics................................................................................................................39 8.4.1 Handset and headset UE sending................................................................................................................39 8.4.2 Handset and headset UE receiving.............................................................................................................39 8.4.3 Vehicle Mounted & Desktop hands-free UE sending.................................................................................39 8.4.4 Vehicle Mounted & Desktop hands-free UE receiving..............................................................................40 8.4.5 Hand-Held hands-free UE sending.............................................................................................................40 8.4.6 Hand-Held hands-free UE receiving...........................................................................................................40 8.5 Sidetone characteristics....................................................................................................................................40 8.5.1 Connections with Handset UE....................................................................................................................40 8.5.2 Headset UE.................................................................................................................................................41 8.5.3 Hands-free UE (all categories)....................................................................................................................41 8.5.4 Sidetone delay for handset or headset.........................................................................................................41 8.6 Stability loss.....................................................................................................................................................42 8.7 Acoustic echo control.......................................................................................................................................42 8.7.1 General........................................................................................................................................................42 8.7.2 Acoustic echo control in a hands-free UE..................................................................................................42 8.7.3 Acoustic echo control in a handset UE.......................................................................................................43 8.7.4 Acoustic echo control in a headset UE.......................................................................................................44 8.8 Distortion..........................................................................................................................................................45 8.8.1 Sending Distortion......................................................................................................................................45 8.8.2 Receiving....................................................................................................................................................45 ETSI 3GPP TS 26.132 version 8.0.0 Release 8 5 ETSI TS 126 132 V8.0.0 (2009-01) 8.9 Ambient Noise Rejection.................................................................................................................................45 Annex A (informative): Change history...............................................................................................47 History..............................................................................................................................................................48 ETSI 3GPP TS 26.132 version 8.0.0 Release 8 6 ETSI TS 126 132 V8.0.0 (2009-01) Foreword This Technical Specification has been produced by the 3GPP. The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of this TS, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the specification. Introduction The present document specifies test methods to allow the minimum performance requirements for the acoustic characteristics of GSM and 3G terminals when used to provide narrow-band or wideband telephony to be assessed. The objective for narrow-band services is to reach a quality as close as possible to ITU-T standards for PSTN circuits. However, due to technical and economic factors, there cannot be full compliance with the general characteristics of international telephone connections and circuits recommended by the ITU-T. The performance requirements are specified in TS 26.131; the test methods and considerations are specified in the main body of the text. ETSI 3GPP TS 26.132 version 8.0.0 Release 8 7 ETSI TS 126 132 V8.0.0 (2009-01) 1 Scope The present document is applicable to any terminal capable of supporting narrow-band or wideband telephony, either as a stand-alone service or as the telephony component of a multimedia service. The present document specifies test methods to allow the minimum performance requirements for the acoustic characteristics of GSM and 3G terminals when used to provide narrow-band or wideband telephony to be assessed. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. [1] 3GPP TS 26.131: "Terminal Acoustic Characteristics for Telephony; Requirements". [2] ITU-T Recommendation B.12 (1988): "Use of the decibel and the neper in telecommunications". [3] ITU-T Recommendation G.103 (1998): "Hypothetical reference connections". [4] ITU-T Recommendation G.111 (1993): "Loudness ratings (LRs) in an international connection". [5] ITU-T Recommendation G.121 (1993): "Loudness ratings (LRs) of national systems". [6] ITU-T Recommendation G.122 (1993): "Influence of national systems on stability, talker echo, and listener echo in international connections". [7] ITU-T Recommendation G.711 1988): "Pulse code modulation (PCM) of voice frequencies". [8] ITU-T Recommendation P.11 (1993): "Effect of transmission impairments". [9] ITU-T Recommendation P.38 (1993): "Transmission characteristics of operator telephone systems (OTS)". [10] ITU-T Recommendation P.50 (1993): "Artificial voices". [11] 3GPP TS 03.58 (Release 1997): "Digital Cellular Telecommunications System (Phase 2+) Characterization test methods and quality assessment for hands-free mobiles". [12] IEC Publication 60651: 'Sound Level Meters'. [13] ITU-T Recommendation P.51 (1996): "Artificial mouth". [14] ITU-T Recommendation P.57 (2005): "Artificial ears". [15] ITU-T Recommendation P.58 (1996): "Head and torso simulator for telephonometry." [16] ITU-T Recommendation P.79 (2007) with Annex A: "Calculation of loudness ratings for telephone sets." [17] 3GPP TS 06.77 R99 Minimum Performance Requirements for Noise Suppresser Application to the AMR Speech Encoder. ETSI 3GPP TS 26.132 version 8.0.0 Release 8 8 ETSI TS 126 132 V8.0.0 (2009-01) [18] ITU-T Recommendation P.64: "Determination of sensitivity/frequency characteristics of local telephone systems". [19] ITU-T Recommendation P.581: "Use of head and torso simulator (HATS) for hands-free terminal testing". [20] ITU-T Recommendation P.340: "Transmission characteristics of hands-free telepones". [21] ITU-T Recommendation G.712: "Transmission performance characteristics of pulse code modulation channels". [22] ITU-T Recommendation P.501: "Test signals for use in telephonometry". [23] ITU-T Recommendation O.41: "Psophometer for use on telephone-type circuits". [24] ITU-T Recommendation O.131: "Psophometer for use on telephone-type circuits". [25] ISO 9614: "Acoustics - Determination of sound power levels of noise sources using sound intensity". [26] ISO 3745: "Acoustics - Determination of sound power levels of noise sources - Precision methods for anechoic and semi-anechoic rooms". [27] ITU-T Recommendation O.132: "Quantizing distortion measuring equipment using a sinusoidal test signal". 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document the term narrow-band refers to signals sampled at 8 kHz; wideband refers to signals sampled at 16 kHz. For the purposes of the present document, the following terms: dB, dBr, dBm0, dBm0p and dBA, shall be interpreted as defined in ITU-T Recommendation B.12; the term dBPa shall be interpreted as the sound pressure level relative to 1 pascal expressed in dB (0 dBPa is equivalent to 94 dB SPL). A 3GPP softphone is a telephony system running on a general purpose computer or PDA complying with the 3GPP terminal acoustic requirements (TS 26.131 and 26.132). 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ADC Analogue to Digital Converter DAC Digital to Analogue Converter DTX Discontinuous Transmission EEC Electrical Echo Control EL Echo Loss ERP Ear Reference Point HATS Head and Torso Simulator LSTR Listener Sidetone Rating LRGP Loudness Rating Guardring Position MRP Mouth Reference Point OLR Overall Loudness Rating PCM Pulse Code Modulation PDA Personal Digital Assistant POI Point of Interconnection (with PSTN) PSTN Public Switched Telephone Network RLR Receive Loudness Rating ETSI 3GPP TS 26.132 version 8.0.0 Release 8 9 ETSI TS 126 132 V8.0.0 (2009-01) SLR Send Loudness Rating STMR Sidetone Masking Rating SS System Simulator TX Transmission UE User Equipment 4 Interfaces Access to terminals for acoustic testing is always made via the acoustic or air interfaces. The Air Interface is specified by the GSM 05 or 45 and the 3G 25 series specifications and is required to achieve user equipment (UE) transportability. Measurements can be made at this point using a system simulator (SS) comprising the appropriate radio terminal equipment and speech transcoder. The losses and gains introduced by the test speech transcoder will need to be specified. The POI with the public switched telephone network (PSTN) is considered to have a relative level of 0 dBr, where signals will be represented by 8-bit A-law, according to ITU-T Recommendation G.711. Measurements may be made at this point using a standard send and receive side, as defined in ITU-T Recommendations. Five classes of acoustic interface are considered in this specification: - Handset UE including softphone UE used as a handset; - Headset UE including softphone UE used with headset; - Vehicle Mounted Hands-free UE including softphone UE mounted in a vehicule; - Desktop-mounted hands-free UE including softphone UE with external loudspeaker(s) used in handsfree mode; - Handheld hands-free UE including softphone UE with internal loudspeaker(s) used in handsfree mode. (See definition of softphone in Clause 3.1) NOTE: The test setup for a softphone UE shall be derived according to the following rules: - When using a softphone UE as a handset: the test setup shall correspond to handset mode. - When using a softphone UE with headset: the test setup shall correspond to headset mode. - When a softphone UE is mounted in a vehicle: the test setup shall correspond to Vehicle-mounted handsfree mode. - When using a softphone UE in handsfree mode: - When using internal loudspeaker(s), the test setup shall correspond to handheld hands-free. - When using external loudspeaker(s), the test setup shall correspond to desktop-mounted hands-free. 5 Test configurations This section describes the test setups for terminal acoustic testing. NOTE: If the terminal has several mechanical configurations (e.g. sliding design open or closed), all manufacturer-defined configurations shall be tested. 5.1 Setup for terminals The general access to terminals is described in Figure 1. The preferred acoustic access to GSM and 3G terminals is the most realistic simulation of the 'average' subscriber. This can be made by using HATS (head and torso simulator) or LRGP (Loudness Rating Guardring Position), with appropriate ear simulation and appropriate mountings for handset terminals in a realistic but reproducible, way to the HATS / LRGP. . Hands-free terminals shall use the HATS or free ETSI