SIST EN 300 723 V7.1.1:2003

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 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 300 723 Version 7.1.1SIST EN 300 723 V7.1.1:2003en01-december-2003SIST EN 300 723 V7.1.1:2003SLOVENSKI
STANDARD



SIST EN 300 723 V7.1.1:2003



ETSI EN 300 723 V7.1.1 (2000-11)European Standard (Telecommunications series) Digital cellular telecommunications system (Phase 2+);Enhanced Full Rate (EFR) speech processing functions;General description(GSM 06.51 version 7.1.1 Release 1998)GLOBAL SYSTEM
FOR MOBILE COMMUNICATIONSR
SIST EN 300 723 V7.1.1:2003



ETSI ETSI EN 300 723 V7.1.1 (2000-11)2(GSM 06.51 version 7.1.1 Release 1998)
Reference REN/SMG-110651Q7R1 Keywords Digital cellular telecommunications system, Global System for Mobile communications (GSM) ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2000. All rights reserved.
SIST EN 300 723 V7.1.1:2003



ETSI ETSI EN 300 723 V7.1.1 (2000-11)3(GSM 06.51 version 7.1.1 Release 1998) Contents Intellectual Property Rights.4 Foreword.4 1 Scope.5 2 References.5 3 Definitions and abbreviations.6 3.1 Definitions.6 3.2 Abbreviations.6 4 General.6 5 Enhanced Full Rate speech channel transcoding.8 6 Enhanced Full Rate speech channel discontinuous transmission (DTX).8 7 Enhanced Full Rate speech channel Voice Activity Detection (VAD).8 8 Enhanced Full Rate speech channel comfort noise insertion.9 9 Enhanced Full Rate speech channel lost speech frame substitution and muting.9 10 Enhanced Full Rate codec homing.9 11 Alternative Enhanced Full Rate implementation using the Adaptive Multi Rate 12.2 kbit/s mode.10 Annex A (informative): Change Request History.11 History.12
SIST EN 300 723 V7.1.1:2003



ETSI ETSI EN 300 723 V7.1.1 (2000-11)4(GSM 06.51 version 7.1.1 Release 1998) Intellectual 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 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 (http://www.etsi.org/ipr). 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 to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Special Mobile Group (SMG). The present document introduces the Enhanced Full Rate (EFR) speech traffic channels within the digital cellular telecommunications system. The contents of the present document is subject to continuing work within SMG and may change following formal SMG approval. Should SMG modify the contents of the present document it will be re-released with an identifying change of release date and an increase in version number as follows: Version 7.x.y where: 7 indicates Release 1998 of GSM Phase 2+. x the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. y the third digit is incremented when editorial only changes have been incorporated in the specification.
National transposition dates Date of adoption of this EN: 24 November 2000 Date of latest announcement of this EN (doa): 28 February 2001 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 August 2001 Date of withdrawal of any conflicting National Standard (dow): 31 August 2001
SIST EN 300 723 V7.1.1:2003



ETSI ETSI EN 300 723 V7.1.1 (2000-11)5(GSM 06.51 version 7.1.1 Release 1998) 1 Scope The present document is an introduction to GSM 06.60 [6], GSM 06.61 [7], GSM 06.62 [8], GSM 06.81 [9] and GSM 06.82 [10] ENs dealing with the speech processing functions in the Enhanced Full Rate channel of the GSM system. A general overview of the speech processing functions is given, with reference to the ENs where each function is specified in detail. 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, 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 same number. • For this Release 1998 document, references to GSM documents are for Release 1998 versions (version 7.x.y). [1] GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms". [2] GSM 03.50: "Digital cellular telecommunications system (Phase 2+); Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system". [3] GSM 05.03: "Digital cellular telecommunications system (Phase 2+); Channel coding". [4] GSM 06.53: "Digital cellular telecommunications system (Phase 2+); ANSI-C code for the GSM Enhanced Full Rate (EFR) speech codec".
[5] GSM 06.54: "Digital cellular telecommunications system (Phase 2+); Test vectors for the GSM Enhanced Full Rate (EFR) speech codec". [6] GSM 06.60: "Digital cellular telecommunications system (Phase 2+); Enhanced Full Rate (EFR) speech transcoding". [7] GSM 06.61: "Digital cellular telecommunications system (Phase 2+); Substitution and muting of lost frame for Enhanced Full Rate (EFR) speech traffic channels". [8] GSM 06.62: "Digital cellular telecommunications system (Phase 2+); Comfort noise aspects for Enhanced Full Rate (EFR) speech traffic channels". [9] GSM 06.81: "Digital cellular telecommunications system (Phase 2+); Discontinuous transmission (DTX) for Enhanced Full Rate (EFR) speech traffic channels". [10] GSM 06.82: "Digital cellular telecommunications system (Phase 2+); Voice Activity Detector (VAD) for Enhanced Full Rate (EFR) speech traffic channels". SIST EN 300 723 V7.1.1:2003



ETSI ETSI EN 300 723 V7.1.1 (2000-11)6(GSM 06.51 version 7.1.1 Release 1998) 3 Definitions and abbreviations 3.1 Definitions Definition of terms used in the present document can be found in GSM 06.60 [6], GSM 06.61 [7], GSM 06.62 [8], GSM 06.81 [9] and GSM 06.82 [10]. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACELP Algebraic Code Excited Linear Prediction BFI Bad Frame Indication
BSS Base Station System CCITT Comité Consultatif International Télégraphique et Téléphonique DTX Discontinuous Transmission ETS European Telecommunication Standard GSM Global System for Mobile communications MS Mobile Station PCM Pulse Code Modulated PLMN Public Land Mobile Network
PSTN Public Switched Telephone Network RF Radio Frequency RSS Radio SubSystem RX Receive SACCH Slow Associated Control CHannel SID SIlence Descriptor SP flag SPeech flag TAF Time Alignment Flag TX Transmit For abbreviations not given in this clause, see GSM 01.04 [1]. 4 General Figure 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 the complete speech path between the audio input/output in the Mobile Station (MS) and the digital interface of the PSTN. The detailed specification of the audio parts are contained in GSM 03.50 [2]. These aspects are only
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