ETSI EN 301 706 V7.1.1 (1999-12)

Digital cellular telecommunications system (Phase 2+) (GSM); Comfort noise aspects for Adaptive Multi-Rate (AMR) speech traffic channels (GSM 06.92 version 7.1.1 Release 1998)

DEN/SMG-110692Q7

Digitalni celični telekomunikacijski sistem (faza 2+) – Vidiki znosnega šuma pri prilagodljivih večhitrostnih (AMR) govornih prometnih kanalih (GSM 06.92, različica 7.1.1, izdaja 1998)

General Information

• Status: Published
• Publication Date: 16-Dec-1999
• Technical Committee: SMG 11 - Speech Aspects
• Current Stage: 12 - Completion
• Due Date: 03-Dec-1999
• Completion Date: 17-Dec-1999
• Mandate: T-172
• Ref Project: SIST EN 301 706 V7.1.1:2003 - Digital cellular telecommunications system (Phase 2+) (GSM); Comfort noise aspects for Adaptive Multi-Rate (AMR) speech traffic channels (GSM 06.92 version 7.1.1 Release 1998)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Comfort noise aspects for Adaptive Multi-Rate (AMR) speech traffic channels (GSM 06.92 version 7.1.1 Release 1998)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 301 706 Version 7.1.1SIST EN 301 706 V7.1.1:2003en01-december-2003SIST EN 301 706 V7.1.1:2003SLOVENSKI
STANDARD



SIST EN 301 706 V7.1.1:2003



ETSIEN301706V7.1.1(1999-12)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationsystem(Phase2+);ComfortnoiseaspectsforAdaptiveMulti-Rate(AMR)speechtrafficchannels(GSM06.92version7.1.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 301 706 V7.1.1:2003



ETSIETSIEN301706V7.1.1(1999-12)2(GSM06.92version7.1.1Release1998)ReferenceDEN/SMG-110692Q7KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]Ideliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute1999.Allrightsreserved.SIST EN 301 706 V7.1.1:2003



ETSIETSIEN301706V7.1.1(1999-12)3(GSM06.92version7.1.1Release1998)ContentIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitions,symbolsandabbreviations.53.1Definitions.53.2Symbols.63.3Abbreviations.64General.75Functionsonthetransmit(TX)side.75.1LSFevaluation.75.2Frameenergycalculation.85.3ModificationofthespeechencodingalgorithmduringSIDframegeneration.85.4SID-frameencoding.96Functionsonthereceive(RX)side.96.1AveraginganddecodingoftheLPandenergyparameters.96.2Comfortnoisegenerationandupdating.107Computationaldetailsandbitallocation.11AnnexA(informative):Documentchangehistory.12History.13SIST EN 301 706 V7.1.1:2003



ETSIETSIEN301706V7.1.1(1999-12)4(GSM06.92version7.1.1Release1998)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbySpecialMobileGroup(SMG).ThepresentdocumentintroducestheAdaptiveMulti-Rate(AMR)speechtrafficchannelswithinthedigitalcellulartelecommunicationssystem.ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7indicatesRelease1998ofGSMPhase2+xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:3December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 301 706 V7.1.1:2003



ETSIETSIEN301706V7.1.1(1999-12)5(GSM06.92version7.1.1Release1998)1ScopeThepresentdocumentgivesthedetailedrequirementsforthecorrectoperationofthebackgroundacousticnoiseevaluation,noiseparameterencoding/decodingandcomfortnoisegenerationinMobileStations(MSs)andBaseStationSystems(BSSs)duringDiscontinuousTransmission(DTX)onadaptivemulti-ratefullrateandhalfratespeechtrafficchannels.TherequirementsdescribedinthepresentdocumentaremandatoryforimplementationinallGSMMSscapableofsupportingtheadaptivemulti-ratefullrateandhalftatespeechtrafficchannels.ThereceiverrequirementsaremandatoryforimplementationinallGSMBSSscapableofsupportingtheadaptivemulti-ratefullrateandhalfratespeechtrafficchannels,thetransmitterrequirementsonlyforthosewheredownlinkDTXwillbeused.IncaseofdiscrepancybetweentherequirementsdescribedinthepresentdocumentandthefixedpointcomputationaldescriptionoftheserequirementscontainedinGSM06.73[2],thedescriptioninGSM06.73[2]willprevail.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.•Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.•Foraspecificreference,subsequentrevisionsdonotapply.•Foranon-specificreference,thelatestversionapplies.•Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.•ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationsystem(Phase2+);Abbreviationsandacronyms".[2]GSM06.73:"Digitalcellulartelecommunicationssystem(Phase2+);ANSI-CcodefortheGSMAdaptiveMulti-Ratespeechcodec".[3]GSM06.90:"Digitalcellulartelecommunicationssystem(Phase2+);AdaptiveMulti-Ratespeechtranscoding".[4]GSM06.91:"Digitalcellulartelecommunicationssystem(Phase2+);SubstitutionandmutingoflostframeforAdaptiveMulti-Ratespeechtrafficchannels".[5]GSM06.93:"Digitalcellulartelecommunicationssystem(Phase2+);Discontinuoustransmission(DTX)forAdaptiveMulti-Ratespeechtrafficchannels".3Definitions,symbolsandabbreviations3.1DefinitionsForthepurposeofthepresentdocument,thefollowingtermsanddefinitionsapply.Frame:timeintervalof20mscorrespondingtothetimesegmentationoftheadaptivemulti-ratespeechtranscoder,alsousedasashorttermfortrafficframe.SIST EN 301 706 V7.1.1:2003



ETSIETSIEN301706V7.1.1(1999-12)6(GSM06.92version7.1.1Release1998)SIDframes:specialSID(SilenceDescriptor)frames.Itmayconveyinformationontheacousticbackgroundnoiseorinformthedecoderthatitshouldstartgeneratingbackgroundnoise.Speechframe:trafficframethatcannotbeclassifiedasaSIDframe.VADflag:voiceActivityDetectionflag.TX_TYPE:oneofSPEECH,SID_FIRST,SID_UPD,NO_DATA(definedinGSM06.93).RX_TYPE:classificationofthereceivedtrafficframe(definedinGSM06.93).OtherdefinitionsoftermsusedinthepresentdocumentcanbefoundinGSM06.90[3]andGSM06.93[5].TheoveralloperationofDTXisdescribedinGSM06.93[5].3.2SymbolsForthepurposeofthepresentdocument,thefollowingsymbolsapply.Boldfacesymbolsareusedforvectorvariables.[]fTfff=1210.UnquantizedLSFvector[].fTfff=1210QuantizedLSFvectorf()mUnquantizedLSFvectorofframemf()mQuantizedLSFvectorofframemfmeanAveragedLSFparametervectorenlogLogarithmicframeenergyenmeanlogAveragedlogarithmicframeenergyfrefReferencevectorforLSFquantizationeComputedLSFparameterpredictionresidualeQuantizedLSFparameterpredictionresidualxnnab()=()()()()=++++−+xaxaxbxb113.3AbbreviationsForthepurposeofthepresentdocument,thefollowingabbreviationsapply.AMRAdaptiveMulti-RateBSSBaseStationSubsystemDTXDiscontinuousTransmissionMSMobileStationSIDSIlenceDescriptorLPLinearPredictionLSPLineSpectralPairLSFLineSpectralFrequencyRXReceiveTXTransmitVADVoiceActivityDetectorForabbreviationsnotgiveninthissubclause,seeGSM01.04[1].SIST EN 301 706 V7.1.1:2003



ETSIETSIEN301706V7.1.1(1999-12
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