1、 ETSI TS 126 453 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); LTE; Codec for Enhanced Voice Services (EVS); Speech codec frame structure (3GPP TS 26.453 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 126 453 V14.0.0 (2017-04)13GPP TS 26.453 version 14.0.0 Rel
2、ease 14Reference RTS/TSGS-0426453ve00 Keywords LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Importan
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9、ersion 14.0.0 Release 14Intellectual 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
10、: “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 (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigatio
11、n, 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
12、 (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
13、 cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. 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 de
14、scribed 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 ETSI TS 126 453 V14.0.0 (2017-04)33GPP TS 26.453 version 14.0.0 Release 14Contents Intellectual Prope
15、rty Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Abbreviations . 6g34 EVS Codec generic frame format in CS Networks 6g34.1 General . 6g34.2 EVS payload sizes in CS Networks 6g34.3 EVS generic frame header 7g34.4 EVS frame quality classification 7g34.5
16、 EVS codec mode request in CS Networks . 7g3Annex A (informative): Change history . 8g3History 9g3ETSI ETSI TS 126 453 V14.0.0 (2017-04)43GPP TS 26.453 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of th
17、e 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: Versio
18、n 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 thir
19、d digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 126 453 V14.0.0 (2017-04)53GPP TS 26.453 version 14.0.0 Release 141 Scope The Enhanced Voice Services (EVS) Codec is specified in the series of Technical Specifications 3GPP TS 26.441 3 to TS 26.4
20、51 13 and it is characterized in TR 26.952 14. The present document describes the “generic frame format“ for the EVS Codec for the application in 3G Circuit-Switched Networks. This format is based on the RTP framing, as specified in TS 26.445 7. This generic frame format will be used as a common ref
21、erence point, when interfacing speech frames between different elements of the 3G system. Appropriate mappings to and from this generic frame format will be used within and between each system element. 2 References The following documents contain provisions which, through reference in this text, con
22、stitute 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 ca
23、se 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 TR 41.001: “GSM Specification set“. 3 3GPP TS
24、 26.441: “Codec for Enhanced Voice Services (EVS); General overview“. 4 3GPP TS 26.442: “Codec for Enhanced Voice Services (EVS); ANSI C code (fixed-point)“. 5 3GPP TS 26.443: “Codec for Enhanced Voice Services (EVS); ANSI C code (floating-point)“. 6 3GPP TS 26.444: “Codec for Enhanced Voice Service
25、s (EVS); Test Sequences“. 7 3GPP TS 26.445: “Codec for Enhanced Voice Services (EVS); Detailed algorithmic description“. 8 3GPP TS 26.446: “Codec for Enhanced Voice Services (EVS); Adaptive Multi-Rate - Wideband (AMR-WB) backward compatible functions“. 9 3GPP TS 26.447: “Codec for Enhanced Voice Ser
26、vices (EVS); Error concealment of lost packets“. 10 3GPP TS 26.448: “Codec for Enhanced Voice Services (EVS); Jitter buffer management“. 11 3GPP TS 26.449: “Codec for Enhanced Voice Services (EVS); Comfort Noise Generation (CNG) aspects“. 12 3GPP TS 26.450: “Codec for Enhanced Voice Services (EVS);
27、Discontinuous Transmission (DTX)“. 13 3GPP TS 26.451: “Codec for Enhanced Voice Services (EVS); Voice Activity Detection (VAD)“. 14 3GPP TR 26.952: “Codec for Enhanced Voice Services (EVS); Performance Characterization“. ETSI ETSI TS 126 453 V14.0.0 (2017-04)63GPP TS 26.453 version 14.0.0 Release 14
28、3 Abbreviations For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. AMR-WB Adaptive Multi-Rate - Wide
29、Band CMR Codec Mode Request (for AMR and AMR-WB and EVS) CS Circuit Switched EVS Enhanced Voice Services EVS-CMR CMR for EVS EVS-SID SID for EVS FQC Frame quality Classification EVS AMR-WB IO EVS AMR-WB Inter Operable (mode of operation) MSB Most Significant Bit RTP Real Time Protocol SID Silence In
30、sertion Descriptor (for AMR and AMR-WB) ToC Table of Contents WB-CMR CMR for AMR-WB WB-SID SID for AMR-WB (and for EVS AMR-WB IO) 4 EVS Codec generic frame format in CS Networks 4.1 General This clause describes the “generic frame format“ of the EVS Codec in 3G CS networks for the Speech and SID fra
31、mes of the primary modes of operation and the Speech and SID frames of the EVS AMR-WB IO mode of operation. This generic frame format is illustrated in Figure 4.1-1 and it is based on the RTP format specified in TS 26.445 7, Annex A, Figure A.3 (c), “Payload structure of Header-Full format with CMR
32、+ ToC single frame“ and in TS 26.445 7, Annex A, Figure A.6, “Payload structure for EVS AMR-WB IO SID (56 bit) payload“ with the following modifications: - The leading “1“ bit, d(0), in the CMR octet (MSB) is omitted in CS networks; bits d(1) . d(7) are copied bit by bit in the same order. EVS-CMR h
33、as therefore 7 bits. - The ToC octet is omitted (Table of Contents in RTP). - The Speech data or SID of the EVS primary and the EVS AMR-WB IO modes are copied bit by bit. Each rate has its own, unique number of bits (n+1). - The 40 bits of the AMR-WB SID, d(0) . d(39), are copied bit by bit into the
34、 generic frame format. Note that the order of Speech data or SID bits is the same as in in TS 26.445 7. Figure 4.1-1: EVS Generic Frame Format in CS Networks 4.2 EVS payload sizes in CS Networks Table 4.2-1 lists all EVS Primary rates for the application in CS Networks, including No_Data. These payl
35、oad sizes are always integer multiples of 8 bits (excluding the 7-bit EVS-CMR). ETSI ETSI TS 126 453 V14.0.0 (2017-04)73GPP TS 26.453 version 14.0.0 Release 14Table 4.2-1: Payload sizes for EVS Primary Rates in CS Networks Rate Payload Size (bits) Net bit rate for active speech (kbps) No_Data 0 - EV
36、S Primary SID 48 - EVS Primary 2.8 56 2,8 EVS Primary 7.2 144 7,2 EVS Primary 8.0 160 8,0 EVS Primary 9.6 192 9,6 EVS Primary 13.2 264 13,2 EVS Primary 16.4 328 16,4 EVS Primary 24.4 488 24,4 Table 4.2-2 lists all EVS AMR-WB IO rates for the application in CS Networks. In contrast to the payload siz
37、es used in RTP, these payloads do not include any CMR overhead. These payload sizes are not always integer multiples of 8 bits (excluding the 7-bit EVS-CMR). Table 4.2-2: Payload sizes for EVS AMR-WB IO modes in CS Networks Rate Payload Size (bits) Net bit rate for active speech (kbps) EVS-AMR-WB IO
38、 SID 40 - EVS AMR-WB IO 6.6 132 6,6 EVS AMR-WB IO 8.85 177 8,85 EVS AMR-WB IO 12.65 253 12,65 4.3 EVS generic frame header The EVS Codec generic frame format in CS networks has no header. The payload size defines the used Codec rate. Parameters inside this EVS payload differentiate the EVS audio ban
39、dwidth and the EVS mode of operation. For details, see TS 26.445 7. 4.4 EVS frame quality classification The EVS Codec generic frame format has no own Frame Quality Indicator. If transported on Iu and Nb the “Frame Quality Classification“ (FQC) of the Iu and Nb framing protocol is used. 4.5 EVS code
40、c mode request in CS Networks The EVS Codec Mode Request (EVS-CMR) is specified in TS 26.445 7, Annex A, Table A.3: Structure of CMR. The EVS-CMR has a size of 7 bits. The Header bit (MSB), specified in TS 26.445 7, is omitted in CS networks. ETSI ETSI TS 126 453 V14.0.0 (2017-04)83GPP TS 26.453 ver
41、sion 14.0.0 Release 14Annex A (informative): Change history Change history Date TSG SA# TSG Doc. CR Rev Subject/Comment Old New 2016-03 70 SP-160071 Presented to TSG SA#71 Plenary (for approval) - 1.0.0 2016-03 Approved at TSG SA#71 1.0.0 13.0.0 Change history Date Meeting TDoc CR Rev Cat Subject/Comment New version 2017-03 75 Version for Release 14 14.0.0 ETSI ETSI TS 126 453 V14.0.0 (2017-04)93GPP TS 26.453 version 14.0.0 Release 14History Document history V14.0.0 April 2017 Publication
