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SIST EN 301 243 V4.0.1:2003

(Main)

Digital cellular telecommunications system (Phase 2) (GSM); Enhanced Full Rate (EFR) speech processing functions; General description (GSM 06.51 version 4.0.1)

Digital cellular telecommunications system (Phase 2) (GSM); Enhanced Full Rate (EFR) speech processing functions; General description (GSM 06.51 version 4.0.1)

EN created for GSM Phase 2 MS type approval purposes (a revision of GSM Phase 2+ ETS)

Digitalni celični telekomunikacijski sistem (faza 2) – Izboljšane funkcije za obdelavo govora s polno hitrostjo (EFR) – Splošni opis (GSM 06.51, različica 4.0.1)

General Information

Status
Published
Publication Date
30-Nov-2003
ICS
33.070.50 - Global System for Mobile Communication (GSM)
Technical Committee
SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Dec-2003
Due Date
01-Dec-2003
Completion Date
01-Dec-2003
Mandate
T-172
Ref Project
ETSI EN 301 243 V4.0.1 (1997-12) - Digital cellular telecommunications system (Phase 2) (GSM); Enhanced Full Rate (EFR) speech processing functions; General description (GSM 06.51 version 4.0.1)

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EN 301 243 V4.0.1:2003EN 301 243 V4.0.1:2003
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EN 301 243 V4.0.1:2003
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2) (GSM); Enhanced Full Rate (EFR) speech processing functions; General description (GSM 06.51 version 4.0.1)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 301 243 Version 4.0.1SIST EN 301 243 V4.0.1:2003en01-december-2003SIST EN 301 243 V4.0.1:2003SLOVENSKI
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SIST EN 301 243 V4.0.1:2003



European Telecommunications Standards InstituteEN 301 243 V4.0.1 (1997-12)European Standard (Telecommunications series)Digital cellular telecommunications system (Phase 2);Enhanced Full Rate (EFR) speech processing functions;General description(GSM 06.51 version 4.0.1)GLOBAL SYSTEM
FOR MOBILE COMMUNICATIONSRSIST EN 301 243 V4.0.1:2003



EN 301 243 V4.0.1 (1997-12)2GSM 06.51 version 4.0.1ReferenceDEN/SMG-110651P (bic0200o.PDF)KeywordsEFR, digital cellular telecommunications system,Global System for Mobile communications(GSM), speechETSI SecretariatPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88X.400c= fr; a=atlas; p=etsi; s=secretariatInternetsecretariat@etsi.frhttp://www.etsi.frCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1997.All rights reserved.SIST EN 301 243 V4.0.1:2003



EN 301 243 V4.0.1 (1997-12)3GSM 06.51 version 4.0.1ContentsIntellectual Property Rights.4Foreword.41Scope.52Normative references.53Definitions and abbreviations.53.1Definitions.53.2Abbreviations.54General.65Enhanced Full Rate speech channel transcoding.76Enhanced Full Rate speech channel discontinuous transmission (DTX).87Enhanced Full Rate speech channel Voice Activity Detection (VAD).88Enhanced Full Rate speech channel comfort noise insertion.99Enhanced Full Rate speech channel lost speech frame substitution and muting.910Enhanced Full Rate codec homing.9History.11SIST EN 301 243 V4.0.1:2003



EN 301 243 V4.0.1 (1997-12)4GSM 06.51 version 4.0.1Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect ofETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSIWeb server (http://www.etsi.fr/ipr).Pursuant to the ETSI Interim IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. Noguarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or the updates onhttp://www.etsi.fr/ipr) which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by the Special Mobile Group (SMG)Technical Committee of the European Telecommunications Standards Institute (ETSI).This EN introduces the Enhanced Full Rate (EFR) speech traffic channels within the digital cellular telecommunicationssystem.This EN corresponds to GSM technical specification, GSM 06.51, version 4.0.1National transposition datesDate of adoption of this EN:19 December 1997Date of latest announcement of this EN (doa):31 March 1998Date of latest publication of new National Standardor endorsement of this EN (dop/e):30 September 1998Date of withdrawal of any conflicting National Standard (dow):30 September 1998SIST EN 301 243 V4.0.1:2003



EN 301 243 V4.0.1 (1997-12)5GSM 06.51 version 4.0.11ScopeThis EN is an introduction to GSM 06.60 (EN 301 245) [6], GSM 06.61 (EN 301 246) [7], GSM 06.62 (EN 301 247) [8],GSM 06.81 (EN 301 248) [9] and GSM 06.82 (EN 301 249) [10] ENs dealing with the speech processing functions in theEnhanced Full Rate channel of the GSM system. A general overview of the speech processing functions is given, withreference to the ENs where each function is specified in detail.2Normative referencesThis EN incorporates by dated and undated reference, provisions from other publications. These normative referencesare cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequentamendments to or revisions of any of these publications apply to this EN only when incorporated in it by amendment orrevision. For undated references, the latest edition of the publication referred to applies.[1]GSM 01.04 (ETR 100): "Digital cellular telecommunications system (Phase 2); Abbreviations andacronyms".[2]GSM 03.50 (ETS 300 540): "Digital cellular telecommunications system (Phase 2); Transmissionplanning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system".[3]GSM 05.03 (ETS 300 575): "Digital cellular telecommunications system (Phase 2); Channelcoding".[4]GSM 06.53 (EN 301 244): "Digital cellular telecommunications system (Phase 2); ANSI-C codefor the GSM Enhanced Full Rate (EFR) speech codec".[5]GSM 06.54 (EN 301 250): "Digital cellular telecommunications system (Phase 2); Test vectors forthe GSM Enhanced Full Rate (EFR) speech codec".[6]GSM 06.60 (EN 301 245): "Digital cellular telecommunications system (Phase 2); Enhanced FullRate (EFR) speech transcoding".[7]GSM 06.61 (EN 301 246): "Digital cellular telecommunications system (Phase 2); Substitution andmuting of lost frame for Enhanced Full Rate (EFR) speech traffic channels".[8]GSM 06.62 (EN 301 247): "Digital cellular telecommunications system (Phase 2); Comfort noiseaspects for Enhanced Full Rate (EFR) speech traffic channels".[9]GSM 06.81 (EN 301 248): "Digital cellular telecommunications system (Phase 2); Discontinuoustransmission (DTX) for Enhanced Full Rate (EFR) speech traffic channels".[10]GSM 06.82 (EN 301 249): "Digital cellular telecommunications system (Phase 2); Voice ActivityDetector (VAD) for Enhanced Full Rate (EFR) speech traffic channels".3Definitions and abbreviations3.1DefinitionsDefinition of terms used in this EN can be found in GSM 06.60 (EN 301 245) [6], GSM 06.61 (EN 301 246) [7],GSM 06.62 (EN 301 247) [8], GSM 06.81 (EN 301 248) [9] and GSM 06.82 (EN 301 249) [10].3.2AbbreviationsFor the purposes of this EN, the following abbreviations apply:ACELPAlgebraic Code Excited Linear PredictionBFIBad Frame IndicationSIST EN 301 243 V4.0.1:2003



EN 301 243 V4.0.1 (1997-12)6GSM 06.51 version 4.0.1BSSBase Station SystemCCITTComité Consultatif International Télégraphique et TéléphoniqueDTXDiscontinuous TransmissionETSEuropean Telecommunication StandardGSMGlobal System for Mobile communicationsMSMobile StationPCMPulse Code ModulatedPLMNPublic Land Mobile NetworkPSTNPublic Switched Telephone NetworkRFRadio FrequencyRSSRadio SubSystemRXReceiveSACCHSlow Associated Control CHannelSIDSIlence DescriptorSP flagSPeech flagTAFTime Alignment FlagTXTransmitFor abbreviations not given in this subclause, see GSM 01.04 (ETR 100) [1].4GeneralFigure 1 presents a reference configuration where the various speech processing functions are identified. In this figure,the relevant Standards for each function are also indicated.In figure 1, the audio parts including analogue to digital and digital to analogue conversion are included, to show thecomplete speech path between the audio input/output in the Mobile Station (MS) and the digital interface of the PSTN.Th
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