SIST ETS 300 727 E1:2003

Digital cellular telecommunications system; Substitution and muting of lost frames for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.61 version 5.1.2)

This draft European Telecommunication Standard (ETS) defines a frame substitution and muting procedure which shall be used by the Receive (RX) Discontinuous Transmission (DTX) handler when one or more lost speech or Silence Descriptor (SID) frames are received from the Radio Sub System (RSS). The requirements of this ETS are mandatory for implementation in all GSM Base Station Systems (BSS)s and Mobile Stations (MS)s capable of supporting the enhanced full-rate speech traffic channel. It is not mandatory to follow the bit exact implementation outlined in this specification and the corresponding C-source code.

Digitalni celični telekomunikacijski sistem – Nadomeščanje in utišanje izgubljenih okvirov v prometnih kanalih izboljšanega govora s polno hitrostjo (EFR) (GSM 06.61, različica 5.1.2)

General Information

• 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 ETS 300 727 ed.1 (1997-04) - Digital cellular telecommunications system; Substitution and muting of lost frames for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.61 version 5.1.2)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 727 E1:2003
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHP±1DGRPHãþDQMHLQXWLãDQMHL]JXEOMHQLK
RNYLURYYSURPHWQLKNDQDOLKL]EROMãDQHJDJRYRUDVSROQRKLWURVWMR()5*60
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Digital cellular telecommunications system; Substitution and muting of lost frames for
Enhanced Full Rate (EFR) speech traffic channels (GSM 06.61 version 5.1.2)
Ta slovenski standard je istoveten z: ETS 300 727 Edition 1
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 727 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 727 E1:2003

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SIST ETS 300 727 E1:2003
EUROPEAN ETS 300 727
TELECOMMUNICATION April 1997
STANDARD
Source: ETSI TC-SMG Reference: DE/SMG-020661
ICS: 33.020
Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
Digital cellular telecommunications system;
Substitution and muting of lost frames for Enhanced
Full Rate (EFR) speech traffic channels
(GSM 06.61 version 5.1.2)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No 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 1997. All rights reserved.

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SIST ETS 300 727 E1:2003
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ETS 300 727 (GSM 06.61 version 5.1.2): April 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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SIST ETS 300 727 E1:2003
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ETS 300 727 (GSM 06.61 version 5.1.2): April 1997
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .7
3.1 Definitions .7
3.2 Abbreviations .7
4 General.8
5 Requirements.9
5.1 Error detection .9
5.2 Lost speech frames .9
5.3 First lost SID frame.9
5.4 Subsequent lost SID frames.9
6 Example solution.9
6.1 Example solution for substitution and muting of lost speech frames.9
6.2 Example solution for substitution and muting of lost SID frames .11
History.12

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SIST ETS 300 727 E1:2003
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ETS 300 727 (GSM 06.61 version 5.1.2): April 1997
Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS defines a frame substitution and muting procedure which is used by the Receive (RX)
Discontinuous Transmission (DTX) handler when one or more lost speech or Silence Descriptor (SID)
frames are received from the Radio Sub System (RSS) within the digital cellular telecommunications
system.
This ETS corresponds to GSM technical specification, GSM 06.61, version 5.1.2.
Transposition dates
Date of adoption: 28 February 1997
Date of latest announcement of this ETS (doa): 31 July 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 January 1998
Date of withdrawal of any conflicting National Standard (dow): 31 January 1998

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ETS 300 727 (GSM 06.61 version 5.1.2): April 1997
1 Scope
This European Telecommunication Standard (ETS) defines a frame substitution and muting procedure
which shall be used by the Receive (RX) Discontinuous Transmission (DTX) handler when one or more
lost speech or Silence Descriptor (SID) frames are received from the Radio Sub System (RSS).
The requirements of this ETS are mandatory for implementation in all GSM Base Station Systems (BSS)s
and Mobile Stations (MS)s capable of supporting the enhanced Full Rate speech traffic channel. It is not
mandatory to follow the bit exact implementation outlined in this ETS and the corresponding C-source
code.
2 Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references, the
latest edition of the publication referred to applies.
[1] GSM 05.03 (ETS 300 575): "Digital cellular telecommunications system
(Phase 2); Channel coding".
[2] GSM 06.60 (ETS 300 726): "Digital cellular telecommunications system;
Enhanced Full Rate (EFR) speech transcoding".
[3] GSM 06.81 (ETS 300 729): "Digital cellular telecommunications system;
Discontinuous transmission (DTX) for Enhanced Full Rate (EFR) speech traffic
channels".
[4] GSM 08.60 (ETS 300 737): "Digital cellular telecommunications system
(Phase 2+); Inband control of remote transcoders and rate adaptors for
Enhanced Full Rate (EFR) and full rate traffic channels".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definition applies:
5-point median operation: Consists of sorting the 5 elements belonging to the set for which the median
operation is to be performed in an ascending order according to their values, and selecting the third
largest value of the sorted set as the median value.
Further definitions of terms used in this ETS can be found in
...