ETSI ETS 300 395-1 ed.1 (1997-05)

SLOVENSKI STANDARD
SIST ETS 300 395-1:1999
01-november-1999
Prizemni snopovni radio (TETRA) - Govorni kodek za prometni kanal s polno
hitrostjo - 1. del: Splošni opis govornih funkcij
Terrestrial Trunked Radio (TETRA); Speech codec for full-rate traffic channel; Part 1:
General description of speech functions
Ta slovenski standard je istoveten z: ETS 300 395-1 Edition 1
ICS:
33.070.10 Prizemni snopovni radio Terrestrial Trunked Radio
(TETRA) (TETRA)
SIST ETS 300 395-1:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 395-1:1999
EUROPEAN ETS 300 395-1
TELECOMMUNICATION May 1997
STANDARD
Source: ETSI TC-RES Reference: DE/RES-06002-1
ICS: 33.020
Key words: TETRA, CODEC
Terrestrial Trunked Radio (TETRA);
Speech CODEC for full-rate traffic channel;
Part 1: General description of speech functions
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: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
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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ETS 300 395-1: May 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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ETS 300 395-1: May 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 Full rate speech CODEC.8
6 Speech control unit.9
6.1 Lost frame aspects .9
6.2 Comfort noise aspects. 10
6.3 Importance parameter .10
6.4 Homing function.10
7 Conformance testing .10
History.11

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ETS 300 395-1: May 1997
Foreword
This European Telecommunication Standard (ETS) has been produced by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
The sole purpose of the copyright statement below is to protect the documentation of the standard itself
and not the technology which is described therein.
ETSI states that the technology described herein is in the sole ownership of THOMSON-CSF (subject to
the right of it's associated partner) and the disclosure of the standard documentation cannot be construed
as granting any right whatsoever by licence or otherwise on the said technology.
THOMSON-CSF has undertaken to grant licences for the technology described in the standard, on fair,
reasonable and non-discriminatory terms and conditions to the users of the present standard in
accordance with the ETSI IPR Policy. Such licences are subject to a licence agreement to be agreed upon
and entered into with THOMSON-CSF.
This ETS consists of four parts as follows:
Part 1: "General description of speech functions";
Part 2: "TETRA CODEC";
Part 3: "Specific operating features";
Part 4: "Codec conformance testing".
Transposition dates
Date of adoption: 2 May 1997
Date of latest announcement of this ETS (doa): 31 August 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 28 February 1998
Date of withdrawal of any conflicting National Standard (dow): 28 February 1998

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1 Scope
This European Telecommunication Standard (ETS) is an introduction to the other parts of this ETS
dealing with the speech processing functions in the TETRA system. In addition to this introduction, this
ETS contains the full specification of the speech CODEC including provisions for specific cases of
operation and optional functionalities plus CODEC conformance testing. In this part, a general overview of
the speech processing parts is given with reference to the ETSs where each part is specified in detail.
2 Normative references
This ETS incorporates, by dated or 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] ETS 300 395-2 (1995): "Radio Equipment and Systems (RES); Trans-European
Trunked Radio (TETRA); Speech codec for full-rate traffic channel; Part 2:
TETRA codec".
[2] ETS 300 395-3 (1995): "Radio Equipment and Systems (RES); Trans-European
Trunked Radio (TETRA); Speech codec for full-rate traffic channel; Part 3:
Specific operating features".
[3] ETS 300 395-4 (1995): "Radio Equipment and Systems (RES); Trans-European
Trunked Radio (TETRA); Speech codec for full-rate traffic channel; Part 4:
Codec conformance testing".
[4] ETS 300 392-2 (1995): "Radio Equipment and Systems (RES); Trans-European
Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air Interface".
[5] ETS 300 392-7 (1995): "Radio Equipment and Systems (RES); Trans-European
Trunked Radio (TETRA); Voice plus Data; Part 7: Security".
3 Definitions, and abbreviations
3.1 Definitions
Refer to ETS 300 392-2 [4], clause 3 for common TETRA definitions.
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
ACELP Algebraic CELP
BS Base Station
CELP Code-Excited Linear Predictive
MFG Missing Frame Generation
MFS Missing Frame Substitution
MS Mobile Station
PCM Pulse Code Modulated
Refer to ETS 300 392-2 [4], clause 3 for common TETRA abbreviations.

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