SIST EN 300 968 V6.0.1:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Test sequences for the GSM half rate speech codec (GSM 06.07 version 6.0.1 Release 1997)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 968 Version 6.0.1SIST EN 300 968 V6.0.1:2003en01-december-2003SIST EN 300 968 V6.0.1:2003SLOVENSKI
STANDARD
EN 300 968 V6.0.1 (1999-06)European Standard (Telecommunications series)Digital cellular telecommunications system (Phase 2+);Half rate speech;Test sequences for the GSM half rate speech codec(GSM 06.07 version 6.0.1 Release 1997)SIST EN 300 968 V6.0.1:2003

ETSIEN 300 968 V6.0.1 (1999-06)2GSM 06.07 version 6.0.1 Release 1997ReferenceDEN/SMG-110607Q6 (8yo0300o.PDF)KeywordsDigital cellular telecommunications system,Global System for Mobile communications (GSM)ETSIPostal 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° 7803/88Internetsecretariat@etsi.frIndividual copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: editor@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 1999.All rights reserved.SIST EN 300 968 V6.0.1:2003

ETSIEN 300 968 V6.0.1 (1999-06)3GSM 06.07 version 6.0.1 Release 1997ContentsIntellectual Property Rights.4Foreword.41Scope.62References.63Definitions and abbreviations.63.1Definitions.63.2Abbreviations.64General.75Test sequence format.75.1File format.75.2Codec homing.76Speech codec test sequences.86.1Codec configuration.86.2Speech codec test sequences.86.2.1Speech encoder test sequences.86.2.2Speech decoder test sequences.96.2.3Codec homing sequence.97DTX test sequences.107.1Codec configuration.107.2DTX test sequences.107.2.1Predictor values computation.107.2.2Spectral comparison.107.2.3Threshold adaptation.117.2.4Periodicity detection.117.2.5Tone detection.117.2.6Safety and initialization.117.2.7Comfort noise test sequence.117.2.8Real speech and tones.118Sequences for finding the 20 ms framing of the GSM half rate speech encoder.128.1Bit synchronization.128.2Frame synchronization.128.3Formats and sizes of the synchronization sequences.139Trau Testing with 8 Bit A- and µ-law PCM Test Sequences.1410Test sequences for the GSM half rate speech codec.15Annex A (informative):Change Request History.16History.17SIST EN 300 968 V6.0.1:2003

ETSIEN 300 968 V6.0.1 (1999-06)4GSM 06.07 version 6.0.1 Release 1997Intellectual 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 SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical Committee Special MobileGroup (SMG).An electronic attachment accompanies the present document, containing test sequences for a bit exact implementation ofthe half rate speech transcoder.Archive 8yo0300o.ZIP which accompanies the present document contains compressed files which are labelled asfollows:Disks24.zipClause 10: Test sequences for the GSM half rate speech codec; Disks 2 and 4 (GSM 06.07).Disks135.zipClause 10: Test sequences for the GSM half rate speech codec; Disks 1, 3 and 5 (GSM 06.07).Disks6A.zipClause 10: Test sequences for the GSM half rate speech codec; Disks 6 and 10 (GSM 06.07).Disks7B.zipClause 10: Test sequences for the GSM half rate speech codec; Disks 7 and 11 (GSM 06.07).Disks89.zipClause 10: Test sequences for the GSM half rate speech codec; Disks 8 and 9 (GSM 06.07).The present document specifies the half rate speech traffic channels for the Digital cellular telecommunications system.The present document specifies the digital test sequences for the GSM half rate speech codec for the digital cellulartelecommunications system. The present document, is part of a series covering the half rate speech traffic channels asdescribed below:GSM 06.02"Digital cellular telecommunications system (Phase 2+); Half rate speech; Half rate speechprocessing functions".GSM 06.06"Digital cellular telecommunications system (Phase 2+); Half rate speech; ANSI-C code for theGSM half rate speech codec".GSM 06.07"Digital cellular telecommunications system (Phase 2+); Half rate speech; Test sequences forthe GSM half rate speech codec".GSM 06.20"Digital cellular telecommunications system (Phase 2+); Half rate speech; Half rate speechtranscoding".GSM 06.21"Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and mutingof lost frames for half rate speech traffic channels".GSM 06.22"Digital cellular telecommunications system (Phase 2+); Half rate speech; Comfort noise aspectsfor half rate speech traffic channels".GSM 06.41"Digital cellular telecommunications system (Phase 2+); Half rate speech; DiscontinuousTransmission (DTX) for half rate speech traffic channels".GSM 06.42"Digital cellular telecommunications system (Phase 2+); Half rate speech; Voice Activity Detector(VAD) for half rate speech traffic channels".SIST EN 300 968 V6.0.1:2003

ETSIEN 300 968 V6.0.1 (1999-06)5GSM 06.07 version 6.0.1 Release 1997The contents of the present document is subject to continuing work within SMG and may change following formal SMGapproval. Should SMG modify the contents of the present document it will be re-released with an identifying change ofrelease date and an increase in version number as follows:Version 6.x.ywhere:6indicates Release 1997 of GSM Phase 2+xthe second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates,etc.ythe third digit is incremented when editorial only changes have been incorporated in the specification.National transposition datesDate of adoption of this EN:05 June 1999Date of latest announcement of this EN (doa):30 September 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 March 2000Date of withdrawal of any conflicting National Standard (dow):31 March 2000SIST EN 300 968 V6.0.1:2003

ETSIEN 300 968 V6.0.1 (1999-06)6GSM 06.07 version 6.0.1 Release 19971ScopeThe present document specifies the digital test sequences for the GSM half rate speech codec. These sequences test for abit exact implementation of the half rate speech transcoder (GSM 06.20 [2]), Voice Activity Detector (GSM 06.42 [6]),comfort noise (GSM 06.22 [4]) and the discontinuous transmission (GSM 06.41 [5]).2ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.· For a non-specific reference, the latest version applies.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations andacronyms".[2]GSM 06.20: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Half ratespeech transcoding".[3]GSM 06.21: "Digital cellular telecommunications system (Phase 2+); Half rate speech;Substitution and muting of lost frame for half rate speech traffic channels".[4]GSM 06.22: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Comfortnoise aspects for half rate speech traffic channels".[5]GSM 06.41: "Digital cellular telecommunications system (Phase 2+); Half rate speech;Discontinuous Transmission (DTX) for half rate speech traffic channels".[6]GSM 06.42: "Digital cellular telecommunications system (Phase 2+); Half rate speech; VoiceActivity Detector (VAD) for half rate speech traffic channels".[7]GSM 06.06: "Digital cellular telecommunications system (Phase 2+); Half rate speech; ANSI-Ccode for the GSM half rate speech codec".[8]GSM 06.02: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Half ratespeech coding functions".3Definitions and abbreviations3.1DefinitionsDefinition of terms used in the present document can be found in GSM 06.20 [2], GSM 06.21 [3], GSM 06.22
[4],GSM 06.41 [5] and GSM 06.42 [6].3.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:ETSEuropean Telecommunication StandardSIST EN 300 968 V6.0.1:2003

ETSIEN 300 968 V6.0.1 (1999-06)7GSM 06.07 version 6.0.1 Release 1997GSMGlobal System for Mobile communicationsFor abbreviations not given in this subclause, see GSM 01.04 [1].4GeneralDigital test sequences are necessary to test for a bit exact implementation of the half rate speech transcoder(GSM 06.20 [2]), Voice Activity Detector (GSM 06.42 [6]), comfort noise (GSM 06.22 [4]) and the discontinuoustransmission (GSM 06.41 [5]).The test sequences may also be used to verify installations of the ANSI C code in GSM 06.06 [7].Clause 5 describes the format of the files which contain the digital test sequences. Clause 6 describes the test sequencesfor the speech transcoder. Clause 7 describes the test sequences for the VAD, comfort noise and discontinuoustransmission.Clause 8 describes the method by which synchronization is obtained between the test sequences and the speech codecunder test.Clause 9 describes the optional acceptance testing of the speech encoder and decoder in the TRAU by means of 8 bit A-or m-law compressed test sequences on the A-Interface.Electronic copies of the digital test sequences are provided as clause 10, these digital test sequences are contained inarchive 8yo0300o.ZIP which accompanies the present document.5Test sequence formatThis clause provides information on the format of the digital test sequences for the GSM half rate speech transcoder(GSM 06.20 [2]), Voice Activity Detector (GSM 06.42 [6]), comfort noise (GSM 06.22 [4]) and the discontinuoustransmission (GSM 06.41 [5]).5.1File formatThe test sequence files are provided in archive 8yo0300o.ZIP which accompanies the present document.Following decompression, by execution of the 11 "disk*.exe" files, four types of file are provided:-Files for input to the GSM half rate speech encoder:*.INP-Files for comparison with the encoder output:*.COD-Files for input to the GSM half rate speech decoder:*.DEC-Files for comparison with the decoder output:*.OUTTables 1, 2, 3 and 4 define the formats of the four types of file. Each parameter in these tables is contained in a 16 bitword except for the samples of the 8 bit PCM test sequences, which are contained in an 8 bit word each. The left or rightjustification is indicated in the tables. The size and location of speech parameters in the encoder output (*.COD) anddecoder input files (*.DEC) are described in GSM 06.20 [2].5.2Codec homingEach *.INP file includes two homing frames at the start of the test sequence. The function of these frames is to reset thespeech encoder state variables to their initial value. In the case of a correct installation of the ANSI-C simulation(GSM 06.06 [7]), all speech encoder output frames shall be identical to the corresponding frame in the *.COD file. Inthe case of a correct hardware implementation undergoing type approval, the first speech encoder output frame isundefined and need not be identical to the first frame in the *.COD file, but all remaining speech encoder output framesshall be identical to the corresponding frames in the *.COD file.SIST EN 300 968 V6.0.1:2003

ETSIEN 300 968 V6.0.1 (1999-06)8GSM 06.07 version 6.0.1 Release 1997Each *.DEC file includes two homing frames at the start of the test sequence. The function of these frames is to reset thespeech decoder state variables to their initial value. In the case of a correct installation of the ANSI-C simulation(GSM 06.06 [7]), all speech decoder output frames shall be identical to the corresponding frame in the *.OUT file. Inthe case of a correct hardware implementation undergoing type approval, the first speech decoder output frame isundefined and need not be identical to first frame in the *.OUT file, but all remaining speech decoder output framesshall be identical to the corresponding frames in the *.OUT file.Table 1: Encoder input sequence (*.INP) formatNameDescriptionNo. of bitsJustifications(n)Encoder input signal13LeftTable 2: Encoder output sequence (*.COD) formatNameDescriptionNo. of wordsJu
...