1、 ETSI TS 1Digital cellular telecoUniversal Mobile TelCodec for circuit switGe(3GPP TS 26.1TECHNICAL SPECIFICATION126 110 V13.0.0 (2016communications system (Phaelecommunications System (itched multimedia telephony General description .110 version 13.0.0 Release 13GLOBAL SYSTEMOBILE COMMUN16-01) hase
2、 2+); (UMTS); ny service; ) TEM FOR ICATIONSRETSI ETSI TS 126 110 V13.0.0 (2016-01)13GPP TS 26.110 version 13.0.0 Release 13Reference RTS/TSGS-0426110vd00 Keywords GSM,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
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9、 Marks registered and owned by the GSM Association. ETSI ETSI TS 126 110 V13.0.0 (2016-01)23GPP TS 26.110 version 13.0.0 Release 13Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essentia
10、l 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 ar
11、e available on the ETSI Web server (https:/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) wh
12、ich 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
13、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 http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “s
14、hould“, “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.
15、 ETSI ETSI TS 126 110 V13.0.0 (2016-01)33GPP TS 26.110 version 13.0.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34
16、General . 7g35 ITU-T H.324 . 8g36 Modifications to H.324 (3GPP TS 26.111) 8g37 Call set-up requirements . 8g38 Terminal implementor“s guide (3GPP TR 26.911) 8g3Annex A (informative): Background information . 9 g3A.1 Video I/O Equipment . 9g3A.2 Video Codec . 9g3A.2.1 H.261 10g3A.2.2 H.263 10g3A.2.3
17、MPEG-4 . 10g3A.3 Audio I/O Codec 10g3A.4 Speech Codec . 10g3A.4.1 3GPP AMR 10g3A.4.2 G.723.1 . 11g3A.5 User Data Applications 11g3A.5.1 Data conferencing T.120 11g3A.5.2 Text conversation T.140 . 12g3A.6 Data Protocols 12g3A.7 System Control . 12g3A.8 Call Set-up 12g3A.9 H.245 12g3A.10 H.223 12g3A.1
18、0.1 Level 0 13g3A.10.2 Level 1 13g3A.10.3 Level 2 13g3A.10.4 Level 3 13g3Annex B (informative): Bibliography . 14g3Annex C (informative): Change history . 15g3History 16 ETSI ETSI TS 126 110 V13.0.0 (2016-01)43GPP TS 26.110 version 13.0.0 Release 13Foreword This Technical Specification has been prod
19、uced by the 3GPP. The present document introduces the set of specifications which apply to 3G-324M multimedia terminals within the 3GPP system. 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 c
20、ontents of this TS, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version 3.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 Indicates TSG approved document under change c
21、ontrol. 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 specification; Introduction This document contains a specification for H.324 base
22、d multimedia codecs for circuit switched 3GPP networks. The term codec is usually associated with a single media type. However, many multimedia services require a close integration of disparate media types. In this sense, the representations of these media types (in the form of media streams) are at
23、 least logically bound into a single multimedia stream. As such, a H.324 based multimedia codec must handle multiplexing/de-multiplexing and skew. It will also have to provide codecs for each of the derived media streams. End-to-end, in-band control is also required for the purposes of configuration
24、 and establishing individual media streams. Finally, since 3GPP networks are inherently error prone, error detection and/or correction must also be provided by the multimedia codec since it has a comprehensive view of the bit stream it produces and therefore can apply the most efficient form of erro
25、r detection and/or correction. ETSI ETSI TS 126 110 V13.0.0 (2016-01)53GPP TS 26.110 version 13.0.0 Release 131 Scope This specification introduces the set of specifications which apply to 3G-324M multimedia terminals. 2 References The following documents contain provisions which, through reference
26、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
27、. 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 ITU-T Recommendation H.223: “Multiplexing protocol for low bitrate multimedia communication“ 2
28、ITU-T Recommendation H.223 Annex A: “Multiplexing protocol for low bitrate multimedia communication over low error-prone channels“ 3 ITU-T Recommendation H.223 Annex B: “Multiplexing protocol for low bitrate multimedia communication over moderate error-prone channels“ 4 ITU-T Recommendation H.223 An
29、nex C: “Multiplexing protocol for low bitrate multimedia communication over highly error-prone channels“ 5 ITU-T Recommendation H.223 Annex D: “Optional multiplexing protocol for low bitrate multimedia communication over highly error-prone channels“ 6 ITU-T Recommendation H.245: “Control protocol fo
30、r multimedia communication“ 7 ITU-T Recommendation G.723.1: “Dual rate speech coder for multimedia communication transmitting at 5.3 General Description 16 3GPP TS 26.090: Mandatory Speech Codec; Speech Transcoding Functions 17 3GPP TS 26.073: Mandatory Speech Codec; ANSI C-Code 18 ITU-T T.140 (1998
31、) Presentation protocol for text conversation application. 19 3GPP TS 22.226: Global Text Telephony; Stage 1 ETSI ETSI TS 126 110 V13.0.0 (2016-01)63GPP TS 26.110 version 13.0.0 Release 1320 3GPP TS 24.008: “Mobile Radio Interface - Layer 3 MM/CC Specification“. 21 3GPP TS 27.001: “General on Termin
32、al Adaptation Functions (TAF) for Mobile Stations (MS)“. 22 3GPP TS 29.007: “General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)“. 23 3GPP TS 23.108: “Mobile radio interface
33、layer 3 specification; Core Network protocols; stage 2“. 24 ITU-T Recommendation G.712: “Transmission performance characteristics of pulse code modulation channels“. 25 ITU-T Recommendation T.120: “Data protocols for multimedia conferencing“. 3 Definitions and abbreviations 3.1 Definitions For the p
34、urposes of the present document, the following terms and definitions apply. H.324 terminal: ITU-T H.324 recommendation, including Annex C 3G-324M terminal: Based on ITU-T H.324 recommendation modified by 3GPP for purposes of 3GPP circuit switched network based video telephony 3.2 Abbreviations For t
35、he purposes of the present document, the following abbreviations apply: ACELP Algebraic-Code-Excited Linear-Prediction ADC Analogue Digital Converter AEC Acoustic Echo Cancellation AL Adaptation Layer CCSRL Control Channel Segmentation and Reassembly Layer CELP Code-Excited Linear-Prediction CT Corr
36、elation Threshold DAC Digital Analogue Converter DCT Discrete Cosine Transformation EI Error Indication EOB End Of Block FEC Forward Error Correction GOB Group Of Blocks GQUANT Group Quantizer information GTT Global Text Telephony HDLC High-Level Data Link Control HEC Header Error Control ISDN Integ
37、rated Services Digital Network LAPM Link Access Procedure for Modems LC Logical Channel MC Multiplex CodeMCU Multipoint Communication Unit MP-MLQ Multipulse Maximum Likelihood Quantization MPL Multiplex Payload Length MR-ACELP Multi-rate ACELP PC Personal ComputerMCU Multipoint Conference Unit MUX H
38、.223 Multiplex layer PDU Protocol Data Unit ETSI ETSI TS 126 110 V13.0.0 (2016-01)73GPP TS 26.110 version 13.0.0 Release 13SN Sequence Number VLC Variable Length Code 4 General 3G-324M terminals provide real-time video, audio, or data, in any combination, including none, over 3GPP circuit-switched,
39、radio networks. They are based on ITU-T H.324 with Annex C, and Annex H when mobile multilink operation is supported. Communication may be either 1-way or 2-way. Such terminals may be part of a portable device or integrated into an automobile or other non fixed location device. They may also be fixe
40、d, stand-alone devices; for example, a video telephone or kiosk. 3G-324M terminals may also be integrated into PCs and workstations. In addition to 3G-324M to 3G-324M communication, interoperation with other types of multimedia telephone terminals is possible, however a gateway may be required. Mult
41、ipoint communication between more than two 3G-324M terminals is possible using a Multipoint Communication Unit (MCU). MCU functionality is for further study. 3G-324M terminals are based on ITU-T H.324 with Annex C, and Annex H when mobile multilink operation is supported. For performance reasons and
42、 to reference the call set-up procedures, some modifications to H.324 were made. These are described in 3GPP TS 26.111, except call set-up procedures are described in 3GPP TS 24.008, 27.001, 29.007 and 23.108. 3G-324M terminals shall conform to these specifications. Because of the many options in H.
43、324, an implementor“s guide, 3GPP TR 26.911, provides preferred options for 3G-324M implementations. Figure 1 below shows the functional components of a generic 3GPP multimedia terminal. The video, speech, data and multilink components are optional. If a media type is supported, the standards indica
44、ted are mandatory except those enclosed in square brackets are optional. Figure 1 Scope of circuit switched multimedia 3GPP specification. Items in brackets are optional. Short descriptions of ITU-T H.324, 3GPP TS 26.111, and 3GPP TR 26.911 are given below. 3GPP TS 26.111 Video I/O Equipment Video C
45、odec H.263, MPEG-4, H.261 Audio I/O Equipment Speech Codec 3GPP-AMR, G.723.1 Optional Receive Path Delay Multiplex/ Demultiplex H.223, H.223 Annex A, H.223 Annex B, H.223 Annex C, H.223 Annex D User Data Applications T.120, Data Protocols V.14, LAPM, System Control H.245 3GPP Network CCSRL NSRPLAPM/
46、V.42 Call Set-up OptionalMultilink H.324 Annex H ETSI ETSI TS 126 110 V13.0.0 (2016-01)83GPP TS 26.110 version 13.0.0 Release 135 ITU-T H.324 ITU-T H.324 describes terminals for low bitrate multimedia communication. That ITU-T recommendation contains ANNEX C, Multimedia Telephone Terminals Over Erro
47、r Prone Channels (sometimes referred to as H.324/M) and ANNEX H, Mobile Multilink Operation. These annexes are considered an integral part of the recommendation. Therefore, herewith H.324 shall mean ITU-T H.324 with Annex C. When multilink operation is utilized, H.324 shall also mean to include H.32
48、4 Annex H. Originally designed for V.34 modems, H.324 now supports ISDN and wireless networks. Therefore, it is well suited as a basis for 3GPP multimedia codecs. Relevant to wireless networks, H.324 describes the overall system architecture and introduces control (H.245), mux (H.223), video (H.261
49、and H.263), text (T.140), and audio (G.723.1). Annex A provides a short overview of H.324 and multimedia codecs. 6 Modifications to H.324 (3GPP TS 26.111) To enable cost-effective, high-quality H.324 terminals for 3GPP networks, some modifications were made to H.324. These modifications are described in 3GPP TS 26.111. Terminals adhering to this specification are herewith known as 3G-324M terminals. 3G-324M terminals shall conform to 3GPP TS 26.111. 7 Call set-up requirements H.324 does not d
