ETSI EN 301 705-2000 Digital Cellular Telecommunications System (Phase 2+) Substitution and Muting of Lost Frames for Adaptive Multi Rate (AMR) Speech Traffic Channels (GSM 06 91 V.pdf
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1、ETSI EN 301 705 V7.1 .I (2000-04) European Standard (Telecomm unica tions series) Digital cellular telecommunications system (Phase 2+); Substitution and muting of lost frames for Adaptive Multi Rate (AMR) speech traffic channels (GSM 06.91 version 7.1 .I Release 1998) (GSM 06.91 version 7.1.1 Relea
2、se 1998) 2 ETSI EN 301 705 V7.1.1 (2000-04) Reference RENEMG-1 10691 Q7R1 Keywords Digital cellular telecommunications system, Global System for Mobile communications (GSM), AMR ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret N
3、o 348 623 562 0001 7 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice The pre ent d Individual copies of the present document can be downloaded from: http:/w.etsi.aq cument mav be made available in more than one electronic version or in
4、 orint. In anv case f existing or perceived difference in coitents between such versions, the reference version is the Poiable Docuhent Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat.
5、Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at ht?p:/.etsi.orn/lb/status/ If you find errors in the present document, send your comment to: editor et.si
6、.fr Coovriaht Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2000. All rights reserved. ETSI (GSM 06.91 version 7.1.1 Release 1998) 3
7、 ETSI EN 301 705 V7.1.1 (2000-04) Contents Intellectual Property Rights 4 Foreword 4 1 2 3 3.1 3.2 4 5 5.1 5.2 5.3 5.4 6 6.1 6.2 6.2.1 6.2.2 6.2.3 6.2.3.1 6.2.3.2 6.3 6.3.1 6.3.2 6.3.2.1 6.3.2.2 6.3.3 6.4 Scope 5 References 5 Definitions and abbreviations 5 Definitions 5 Abbreviations . 6 General .
8、6 Requirements 6 Error detection 6 Lost speech frames . 6 First lost SID frame 6 Subsequent lost SID frames 7 Example ECU/BFH Solution 1 7 State Machine . 7 Assumed Active Speech Frame Error Concealment Unit Actions 8 BFI = O. prevBFI = O. State = O 8 BFI = O. prevBFI = 1. State = O or 5 . 8 BFI = 1
9、, prevBFI = O or 1, State = 1 . . 9 LTP-lag update 9 Innovation sequence 9 Assumed Non-Active Speech Signal Error Concealment Unit Actions 10 General 10 Detectors . 10 Background detector . 10 Voicing detector 10 Background ECU Actions . 10 Substitution and muting of lost SID frames 10 7 Example ECU
10、/BFH Solution 2 11 7.1 State Machine . 11 7.2 Substitution and muting of lost speech frames . 11 7.2.1 BFI = O. prevBFI = O. State = O 11 7.2.2 BFI = O. prevBFI = 1. State = O or 5 . 11 7.2.3 BFI = 1, prevBFI = O or 1, State = 1 . . 12 7.2.3.1 LTP-lag update 12 7.2.4 Innovation sequence . 12 7.3 Sub
11、stitution and muting of lost SID frames 12 Annex A (informative): Document change history 13 History 14 ETSI (GSM 06.91 version 7.1.1 Release 1998) 4 ETSI EN 301 705 V7.1.1 (2000-04) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared t
12、o ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in SR O00 3 14: “Intellectual Propero Rights (IPRs); Essential, or potentially Essential, IPRs notifed to ETSI in respect of ETSI standards“, which is availabl
13、e from the ETSI Secretariat. Latest updates are available on the ETSI Web server (h ttix/www.etsi. ocdini). 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 SR O00 31
14、4 (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 the Special Mobile Group (SMG). The present document introduces the Adaptive Multi-Rate (AMR) speech traf
15、fic 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
16、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 chang
17、es have been incorporated in the specification. National transposition dates Date of adoption of this EN: Date of latest announcement of this EN (doa): Date of latest publication of new National Standard or endorsement of this EN (dop/e): Date of withdrawal of any conflicting National Standard (dow)
18、: 31 March 2000 30June2000 3 1 December 2000 3 1 December 2000 ETSI (GSM 06.91 version 7.1.1 Release 1998) 5 ETSI EN 301 705 V7.1.1 (2000-04) 1 Scope The present document defines a frame substitution and muting procedure which shall be used by the Receive (RX) Discontinuous Transmission (DTX) handle
19、r when one or more lost speech or Silence Descriptor (SID) frames are received from the Radio Sub System (RSS). The requirements of the present document are mandatory for implementation in all GSM Base Station Systems (BSS)s and Mobile Stations (MS)s capable of supporting the AMR speech traffic chan
20、nel. It is not mandatory to follow the bit exact implementation outlined in the present document and the corresponding C source code. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either sp
21、ecific (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 p
22、ublished 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). il GSM 05.03: “Digital cellular telecommunications system (Phase 2+); Channel coding“. Pl 31 GSM 06.90: “Digital cellular telecommunications system (Phas
23、e 2+); AMR speech transcoding“. GSM 06.93: “Digital cellular telecommunications system (Phase 2+); Discontinuous transmission (DTX) for Adaptive Multi Rate (AMR) speech traffic channels“. GSM 08.60: “Digital cellular telecommunications system (Phase 2+); Inband control of remote transcoders and rate
24、 adaptors for AMR, Enhanced Full Rate (EFR) and Full Rate traffic channels“. GSM 08.6 1: “Digital cellular telecommunications system (Phase 2+); Inband control of remote transcoders and rate adaptors for Half Rate traffic channels“. 41 51 3 3.1 Definitions and abbreviations Definitions For the purpo
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