SIST EN 300 966 V8.0.1:2003

• Abstract:

  Updated to Version 8.0.0 CRs from SMG#31

• 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 300 966 V8.0.1 (2000-11) - Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Half rate speech processing functions (GSM 06.02 version 8.0.1 Release 1999)

Overview

SIST EN 300 966 V8.0.1:2003 defines the key speech processing functions for the half rate (HR) channel in GSM Phase 2+ digital cellular telecommunications systems. Focused on efficient speech transmission, this standard is essential for manufacturers and network operators who implement GSM half rate speech services. It covers the interface, operation, and system requirements for half rate speech coding, comfort noise generation, discontinuous transmission (DTX), voice activity detection (VAD), frame substitution, muting, and codec homing. The standard is aligned with EN 300 966 Version 8.0.1 (Release 1999) and includes updates from the European Telecommunications Standards Institute (ETSI).

Key Topics

• Half Rate Speech Transcoding
  Guidance on converting speech signals into efficient bitstreams for GSM HR channels, optimizing bandwidth while maintaining voice quality.
• Discontinuous Transmission (DTX)
  Mechanisms to reduce power consumption and interference by transmitting only during active speech, using comfort noise during pauses.
• Voice Activity Detection (VAD)
  Algorithms for detecting presence or absence of speech, crucial for effective DTX management and network resource optimization.
• Comfort Noise Insertion
  Insertion of synthetic background noise during silent periods, ensuring natural audio output and listener comfort.
• Lost Frame Substitution and Muting
  Techniques to mask the effects of lost or impaired speech frames due to transmission errors or interruptions.
• Codec Homing
  Standardized procedures for resetting codec states and supporting type approval and remote testing.

Applications

SIST EN 300 966 V8.0.1:2003 is vital for multiple stakeholders in mobile telecommunications:

• Mobile Device Manufacturers:
  Ensures interoperability and compliance of mobile stations with GSM networks, supporting robust half rate voice services.
• Network Infrastructure Providers:
  Aligns MSCs, BSS, and other network elements to standard HR speech processing, promoting efficient spectrum usage and service quality.
• Testing and Certification Bodies:
  Offers clear benchmarks for evaluating GSM equipment, including HR codec homing for remote and automated test scenarios.
• Service Providers and Operators:
  Facilitates rollout of half rate voice services, extending network capacity and optimizing energy consumption, especially in high-traffic areas.
• Developers of Embedded and Communication Systems:
  Provides essential guidelines for integrating HR speech codecs and related processing functions in networked devices and embedded platforms.

Related Standards

SIST EN 300 966 V8.0.1:2003 is closely connected to several GSM technical specifications and international standards:

• GSM 06.20: Half rate speech transcoding
• GSM 06.21: Substitution and muting for lost frames in HR traffic channels
• GSM 06.22: Comfort noise aspects for HR channels
• GSM 06.41: Discontinuous transmission (DTX) for HR channels
• GSM 06.42: Voice Activity Detector (VAD) for HR channels
• GSM 06.06: ANSI-C code for the GSM HR speech codec
• GSM 06.07: Test sequences for the GSM HR speech codec
• GSM 01.04: Abbreviations and acronyms for GSM systems
• ITU-T G.711: Pulse Code Modulation (PCM) standards

These standards collectively ensure the quality, reliability, and interoperability of GSM half rate speech services across networks and devices.

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Keywords: GSM, half rate speech, speech processing, VAD, DTX, comfort noise, codec, mobile telecommunications, EN 300 966, ETSI, SIST.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Half rate speech processing functions (GSM 06.02 version 8.0.1 Release 1999)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 966 Version 8.0.1SIST EN 300 966 V8.0.1:2003en01-december-2003SIST EN 300 966 V8.0.1:2003SLOVENSKI
STANDARD
ETSIEN300966V8.0.1(2000-11)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Halfratespeechprocessingfunctions(GSM06.02version8.0.1Release1999)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 966 V8.0.1:2003

ETSIETSIEN300966V8.0.1(2000-11)2(GSM06.02version8.0.1Release1999)ReferenceREN/SMG-110602Q8KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 966 V8.0.1:2003

ETSIETSIEN300966V8.0.1(2000-11)3(GSM06.02version8.0.1Release1999)ContentsIntellectualPropertyRights.4Foreword.41Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74General.75Halfratespeechtranscoding.96HalfrateDiscontinuousTransmission(DTX).97HalfrateVoiceActivityDetection(VAD).108Halfratecomfortnoiseinsertion.109Halfratelostspeechframesubstitutionandmuting.1010Halfratecodechoming.11AnnexA(informative):ChangeRequestHistory.12History.13SIST EN 300 966 V8.0.1:2003

ETSIETSIEN300966V8.0.1(2000-11)4(GSM06.02version8.0.1Release1999)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeSpecialMobileGroup(SMG).Thepresentdocumentgivesageneraloverviewofthehalfratespeechtrafficchannelsspeechprocessingfunctionsforthedigitalcellulartelecommunicationssystem.ThepresentdocumentispartofENs'seriescoveringthehalfratespeechtrafficchannelsasdescribedbelow:GSM06.02"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Halfratespeechprocessingfunctions".GSM06.20"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Halfratespeechtranscoding".GSM06.21"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Substitutionandmutingoflostframesforhalfratespeechtrafficchannels".GSM06.22"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Comfortnoiseaspectsforhalfratespeechtrafficchannels".GSM06.41"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;DiscontinuousTransmission(DTX)forhalfratespeechtrafficchannels".GSM06.42"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;VoiceActivityDetector(VAD)forhalfratespeechtrafficchannels".GSM06.06"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;ANSI-CcodefortheGSMhalfratespeechcodec".GSM06.07"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;TestsequencesfortheGSMhalfratespeechcodec".SIST EN 300 966 V8.0.1:2003

ETSIETSIEN300966V8.0.1(2000-11)5(GSM06.02version8.0.1Release1999)ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version8.x.ywhere:8indicatesRelease1999ofGSMPhase2+xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:3November2000DateoflatestannouncementofthisEN(doa):28February2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31August2001DateofwithdrawalofanyconflictingNationalStandard(dow):31August2001SIST EN 300 966 V8.0.1:2003

ETSIETSIEN300966V8.0.1(2000-11)6(GSM06.02version8.0.1Release1999)1ScopeThepresentdocumentisanintroductiontoGSM06.20[4],GSM06.21[5],GSM06.22[6],GSM06.41[7]andGSM06.42[8]TSsdealingwiththespeechprocessingfunctionsinthehalf-ratechanneloftheGSMsystem.Ageneraloverviewofthespeechprocessingfunctionsisgiven,withreferencetotheTSswhereeachfunctionisspecifiedindetail.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.• ForthisRelease1999document,referencestoGSMdocumentsareforRelease1999versions(version8.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationsystem(Phase2+);Abbreviationsandacronyms".[2]GSM03.50:"Digitalcellulartelecommunicationsystem(Phase2+);TransmissionplanningaspectsofthespeechservicesintheGSMPublicLandMobileNetwork(PLMN)system".[3]GSM05.03:"Digitalcellulartelecommunicationssystem(Phase2+);Channelcoding".[4]GSM06.20:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech:Halfratespeechtranscoding".[5]GSM06.21:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Substitutionandmutingoflostframeforhalfratespeechtrafficchannels".[6]GSM06.22:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Comfortnoiseaspectsforhalfratespeechtrafficchannels".[7]GSM06.41:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Discontinuoustransmission(DTX)forhalfratespeechtrafficchannels".[8]GSM06.42:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;VoiceActivityDetector(VAD)forhalfratespeechtrafficchannels".[9]ITU-TRecommendationG.711:"PulseCodeModulation(PCM)ofvoicefrequencies".[10]GSM06.07:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;TestsequencesfortheGSMhalfratespeechcodec".[11]GSM06.06:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;ANSI-CcodefortheGSMhalfratespeechcodec".SIST EN 300 966 V8.0.1:2003

ETSIETSIEN300966V8.0.1(2000-11)7(GSM06.02version8.0.1Release1999)3Definitionsandabbreviations3.1DefinitionsDefinitionoftermsusedinth
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