1、 ETSI TS 122 076 V14.0.0 (2017-03) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Noise suppression for the AMR codec; Service description; Stage 1 (3GPP TS 22.076 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 12
2、2 076 V14.0.0 (2017-03)13GPP TS 22.076 version 14.0.0 Release 14Reference RTS/TSGS-0422076ve00 Keywords GSM,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 but non lucratif e
3、nregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present
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9、tion. ETSI ETSI TS 122 076 V14.0.0 (2017-03)23GPP TS 22.076 version 14.0.0 Release 14Intellectual 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
10、 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
11、.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 t
12、o the present document. Foreword 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 a
13、nd ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. 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
14、 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 ETSI TS 122 076 V14.0.0 (2017-03)33GPP TS 22.076 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs te
15、rminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g34 Description . 5g34.1 Applicability of Noise Suppression to Basic Services 5g34.2 Support in Mobile Stations (MS) . 6g34.3 Support in the Network 6g34.4 Parameters to be indicated and negotiated . 6g34.5 Prov
16、ision of Service . 6g34.5.1 Location Independence . 6g34.5.2 Provision of service within and between networks . 6g34.5.3 Subscription and Billing Information . 6g34.6 Quality of Service (QoS) 6g34.6.1 Impact on Speech Quality . 6g34.6.1.1 Initial Convergence Time 6g34.6.1.2 No Degradation in Clean S
17、peech 7g34.6.1.3 No Artefacts in Residual Noise . 7g34.6.1.4 No Speech Clipping and no Reduction in Intelligibility . 7g34.6.1.5 Quality Impact compared to AMR 7g34.6.2 Impact on Speech Path Delay . 7g34.7 Impact on Complexity 7g34.8 Impact on Channel Activity 8g35 Interaction with supplementary ser
18、vices 8g35.1 General . 8g35.2 Explicit Call Transfer (ECT) 8g35.3 Call wait/Call hold 8g35.4 Multiparty . 8g35.5 Service Announcements . 9g36 Interaction with Alternate and Followed by services . 9g37 Interaction with other speech services 9g38 Interaction with DTMF and other signalling tones 9g39 I
19、nteraction with Lawful Intercept . 9g310 Interaction with TFO 9g3Annex A (informative): Change Request History 10g3History 11g3ETSI ETSI TS 122 076 V14.0.0 (2017-03)43GPP TS 22.076 version 14.0.0 Release 14Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnershi
20、p Project (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 the present document, it will be re-released by the TSG with an identifying change of release date and an increase
21、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, c
22、orrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 122 076 V14.0.0 (2017-03)53GPP TS 22.076 version 14.0.0 Release 141 Scope The present document specifies the stage 1 description for the Noise Suppression featu
23、re for the AMR codec which enhances the input speech signal corrupted by acoustic noise. In analogy with ITU-T Recommendations I.130 1, Stage 1 is an overall service description, from the service subscribers and users standpoints, that views the network as a single entity which provides services to
24、the user. 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,
25、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 ITU-
26、T Recommendations I.130 (1988): “Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN“. 2 GSM 01.04 (ETR 350): “Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms“. 3 GSM 03.50: “Digital cellular telecom
27、munications system (Phase 2+); Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system“. 3 Definitions and abbreviations GSM 01.04 2 (ETR 350) provides a list of abbreviations and acronyms used in GSM specifications. 4 Description Noise Suppression for
28、 the AMR codec is an optional feature designed to enhance speech quality in a range of environments where there is significant (acoustic) background noise. The noise suppression function is a preprocessing module that is used to improve the signal to noise ratio of a speech signal prior to voice cod
29、ing. In so doing it may use functions and/or data from the AMR speech encoding function. It shall be possible to implement AMR Noise Suppression in the mobile station (operating on the uplink speech signal). The possibility to implement AMR Noise Suppression in the network (operating on the downlink
30、 speech signal) is for further study. The noise suppression specification shall be comprised of bit exact fixed point C code. Test vectors shall be defined to verify operation. The AMR Speech decoder C-code should not be altered by the Noise Suppression. It shall be possible for the network to disab
31、le the operation of the example noise suppression algorithm defined by this feature, whether that operation is operational in the network, the mobile station, or both locations. 4.1 Applicability of Noise Suppression to Basic Services. This feature shall be applicable (as an option) to all speech ca
32、lls where the narrowband AMR codec is utilised. Operation of noise suppression for wideband AMR is for further study. ETSI ETSI TS 122 076 V14.0.0 (2017-03)63GPP TS 22.076 version 14.0.0 Release 144.2 Support in Mobile Stations (MS) Support of the Noise Suppression feature shall require modification
33、s to future mobile stations. Provision of the feature in AMR-capable mobile stations is a manufacturer dependent option. Use of the feature in the network during a call should not place any requirements on its use within the MS. Similarly, use of the feature by the MS during a call shall not place a
34、ny requirements on its use in the network. The network shall be able to enable or disable this example optional noise suppression function both at call set-up and in call Signalling between network and mobile to allow this control is under study in SMG2 WPA. 4.3 Support in the Network Provision of t
35、he feature in the network should be an option. Use of the feature in the network during a call should not place any requirements on its use within the MS. Similarly, use of the feature by the MS during a call should not place any requirements on its use in the network. The network should be able to
36、enable or disable this example optional noise suppression function both at call set-up and in call. 4.4 Parameters to be indicated and negotiated TBD 4.5 Provision of Service 4.5.1 Location Independence The Noise suppression feature shall be location independent. 4.5.2 Provision of service within an
37、d between networks Provision of the feature is the same whether or not the call is wholly contained within a network or between networks. 4.5.3 Subscription and Billing Information This feature shall not be provisioned on a per-subscriber basis and no record of the application of Noise Suppression i
38、s necessary for billing purposes. 4.6 Quality of Service (QoS) 4.6.1 Impact on Speech Quality The following performance requirements are stated under the assumption that the noise suppressor is tested as an integral part of the AMR speech codec with the speech codec operating at the following rates
39、TBD. The performance requirements must be met for all these stated speech codec rates. 4.6.1.1 Initial Convergence Time The initial convergence time shall be a maximum of T seconds with T equal to 2s. The definition of this time interval shall be understood strictly in accordance with its means of u
40、se in subjective listening experiments. Its use shall be defined by a process whereby the first T seconds of each sample processed through the AMR speech codec with and without noise suppression active, is deleted before presentation to listeners. It is assumed that this process does not reduce inte
41、lligibility, or introduce clipping or similar effects into the resultant speech plus noise material. ETSI ETSI TS 122 076 V14.0.0 (2017-03)73GPP TS 22.076 version 14.0.0 Release 14To test the subjective effect of initial convergence, there will be a subset of subjective testing defined where this in
42、itial period of T seconds is not removed from the processed samples. These tests should be representative of the full range of noise conditions. 4.6.1.2 No Degradation in Clean Speech The noise suppression function must not have a statistically significant distorting effect on clean speech, in compa
43、rison with the performance of the AMR codec without noise suppression applied. This requirement also applies to the case where tandeming of the standardised example noise suppression function occurs for mobile to mobile calls, in which case the reference condition is the tandem condition without noi
44、se suppression activated. This requirement also applies when VAD/DTX is active. 4.6.1.3 No Artefacts in Residual Noise The noise suppression function must not introduce any subjectively objectionable artefacts in the residual noise. This requirement also applies to the case where tandeming of the st
45、andardised example noise suppression function occurs for mobile to mobile calls, in which case the reference condition is the tandem condition without noise suppression activated. This requirement also applies when VAD/DTX is active. 4.6.1.4 No Speech Clipping and no Reduction in Intelligibility The
46、 noise suppression function should introduce no subjectively objectionable degradation such as clipping or distortion in the speech, and no reduction in intelligibility. This requirement also applies to the case where tandeming of the standardised example noise suppression function occurs for mobile
47、 to mobile calls, in which case the reference condition is the tandem condition without noise suppression activated. This requirement also applies when VAD/DTX is active. 4.6.1.5 Quality Impact compared to AMR The AMR speech codec with noise suppression activated must produce an output in noisy spee
48、ch which is preferred amongst test listeners with statistical significance, compared to the case where noise suppression is not used. This requirement also applies to the case where tandeming of the standardised example noise suppression function occurs for mobile to mobile calls, in which case the
49、reference condition is the tandem condition without noise suppression activated. This requirement also applies when VAD/DTX is active. 4.6.2 Impact on Speech Path Delay The one way algorithmic delay due to the activation of AMR noise suppression shall be no more than 7 ms in excess of the delay inserted by the AMR speech codec. In handsfree case, this delay is part of the 39ms delay specified in GSM 03.50 3. 4.7 Impact on Complexity Table 4.1 defines complexity limits for AMR noise suppression. ETSI ETSI TS 122 076 V14.0.0 (2017-03)83GPP TS 22.076 ve
