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TECHNICAL SPECIFICATIONION
Universal Mobile Telelecommunications System ( (UMTS);
LTE;
Codec for Ennhhanced Voice Services (EVS)S);
ANSII C code (floating C -point)
(3GPP TS 26.4.443 version 12.1.0 Release 12 12)
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3GPP TS 26.443 version 12.1.0 Release 12 1 ETSI TS 126 443 V12.1.0 (2015-04)
Reference
RTS/TSGS-0426443vc10
Keywords
LTE,UMTS
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ETSI
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3GPP TS 26.443 version 12.1.0 Release 12 2 ETSI TS 126 443 V12.1.0 (2015-04)
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://ipr.etsi.org).
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 Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 26.443 version 12.1.0 Release 12 3 ETSI TS 126 443 V12.1.0 (2015-04)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 4
1 Scope . 5
2 References . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 C code structure . 6
4.1 Contents of the C source code . 7
4.2 Program execution . 7
5 File formats . 7
5.1 Input/output file format . 7
5.2 Rate switching profile (encoder input) . 8
5.3 Parameter bitstream file (encoder output / decoder input) . 8
5.3.1 ITU-T G.192 compliant format . 8
5.3.2 Compact storage format file. 8
5.4 VoIP parameter bitstream file (decoder input) . 8
5.5 Bandwidth switching profile (encoder input) . 9
5.6 Channel-aware configuration file (encoder input and decoder output) . 9
5.7 JBM trace file (decoder output) . 9
Annex A (informative): Change history . 10
History . 11
ETSI
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3GPP TS 26.443 version 12.1.0 Release 12 4 ETSI TS 126 443 V12.1.0 (2015-04)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
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3GPP TS 26.443 version 12.1.0 Release 12 5 ETSI TS 126 443 V12.1.0 (2015-04)
1 Scope
The present document contains an electronic copy of the ANSI C floating-point code for the Enhanced Voice Services
(EVS) Codec. This ANSI C code is the unique alternative reference specification besides the ANSI-C fixed-point code
for the EVS Codec (3GPP TS 26.442) for a standard compliant implementation of the EVS Codec (3GPP TS 26.445),
Voice Activity Detection (VAD) (3GPP TS 26.451), Comfort Noise Generation (CNG) (3GPP TS 26.449),
Discontinuous Transmission (DTX) (3GPP TS 26.450), Packet Loss Concealment (PLC) of Lost Packets (3GPP
TS 26.447), Jitter Buffer Management (JBM) (3GPP TS 26.448), and AMR-WB Interoperable Function (3GPP
TS 26.446).
Requirements for any implementation of the EVS codec to be standard compliant are specified in 3GPP TS 26.444
(Test sequences).
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. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 26.445: "Codec for Enhanced Voice Services (EVS); Detailed Algorithmic Description".
[3] 3GPP TS 26.451: "Codec for Enhanced Voice Services (EVS); Voice Activity Detection (VAD)".
[4] 3GPP TS 26.449: "Codec for Enhanced Voice Services (EVS); Comfort Noise Generation (CNG)
Aspects".
[5
...