ETSI TS 126 114 V12.17.0 (2019-10)

Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114 version 12.17.0 Release 12)

RTS/TSGS-0426114vch0

General Information

• Status: Published
• Publication Date: 09-Oct-2019
• Technical Committee: 3GPP SA 4 - Codec
• Current Stage: 12 - Completion
• Completion Date: 10-Oct-2019

Standards Content (Sample)

ETSI TS 126 114 V12.17.0 (2019-10)






TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
IP Multimedia Subsystem (IMS);
Multimedia telephony;
Media handling and interaction
(3GPP TS 26.114 version 12.17.0 Release 12)

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3GPP TS 26.114 version 12.17.0 Release 12 1 ETSI TS 126 114 V12.17.0 (2019-10)



Reference
RTS/TSGS-0426114vch0
Keywords
LTE,UMTS
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3GPP TS 26.114 version 12.17.0 Release 12 2 ETSI TS 126 114 V12.17.0 (2019-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (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) which are, or may be, or may become, essential to the present document.
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Legal Notice
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. These shall be
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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.
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3GPP TS 26.114 version 12.17.0 Release 12 3 ETSI TS 126 114 V12.17.0 (2019-10)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 13
Introduction . 13
1 Scope . 14
2 References . 14
3 Definitions and abbreviations . 20
3.1 Definitions . 20
3.2 Abbreviations . 21
4 System description . 22
4.1 System . 22
4.2 Client . 23
4.3 MRFP and MGW . 25
5 Media codecs . 25
5.1 Media components . 25
5.2 Codecs for MTSI clients in terminals . 26
5.2.1 Speech . 26
5.2.1.1 General codec requirements . 26
5.2.1.2 Detailed codec requirements, AMR . 26
5.2.1.3 Detailed codec requirements, AMR-WB . 26
5.2.1.4 Detailed codec requirements, EVS . 27
5.2.1.5 Offering multiple audio bandwidths and multiple channels . 27
5.2.1.6 Codec preference order . 27
5.2.2 Video . 27
5.2.3 Real-time text . 29
6 Media configuration . 29
6.1 General . 29
6.2 Session setup procedures . 30
6.2.1 General . 30
6.2.1a RTP profile negotiation . 30
6.2.1a.1 General . 30
6.2.1a.2 Using SDPCapNeg in SDP offer . 30
6.2.1a.3 Answering to an SDP offer using SDPCapNeg . 31
6.2.2 Speech . 31
6.2.2.1 General . 31
6.2.2.2 Generating SDP offers . 32
6.2.2.3 Generating SDP answer . 35
6.2.3 Video . 43
6.2.4 Text . 45
6.2.5 Bandwidth negotiation . 45
6.2.5.1 General . 45
6.2.5.2 Speech . 46
6.2.6 The Synchronization Info attribute "3gpp_sync_info" . 47
6.2.7 Negotiated QoS parameters . 48
6.3 Session control procedures . 49
7 Data transport . 49
7.1 General . 49
7.2 RTP profiles . 50
7.3 RTCP usage . 50
7.3.1 General . 50
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3GPP TS 26.114 version 12.17.0 Release 12 4 ETSI TS 126 114 V12.17.0 (2019-10)
7.3.2 Speech . 51
7.3.3 Video . 52
7.3.4 Real-time text . 53
7.3.5 Void . 53
7.3.6 Reduced-Size RTCP . 53
7.4 RTP payload formats for MTSI clients . 54
7.4.1 General . 54
7.4.2 Speech . 54
7.4.3 Video . 55
7.4.4 Real-time text . 55
7.4.5 Coordination of Video Orientation . 56
7.5 Media flow . 58
7.5.1 General . 58
7.5.2 Media specific . 58
7.5.2.1 Speech . 58
7.5.2.1.1 General . 58
7.5.2.1.2 Default operation . 58
7.5.2.1.3 HSPA . 59
7.5.2.1.4 EGPRS. 59
7.5.2.1.5 GIP . 59
7.5.2.1.6 Initial codec mode for AMR and AMR-WB . 59
7.5.2.1.7 E-UTRAN . 60
7.5.2.1.8 Initial codec mode for EVS . 60
7.5.2.1.9 Dual-mono . 60
7.5.2.2 Video . 61
7.5.2.3 Text . 61
7.5.3 Media synchronization . 61
7.5.3.1 General . 61
7.5.3.2 Text . 61
7.5.4 ECN usage in RTP sessions . 61
8 Jitter buffer management in MTSI clients in terminals . 62
8.1 General . 62
8.2 Speech . 62
8.2.1 Terminology . 62
8.2.2 Functional requirements for jitter-buffer management . 63
8.2.3 Minimum performance requirements for jitter-buffer management . 63
8.2.3.1 General . 63
8.2.3.2 Objective performance requirements . 64
8.2.3.2.1 General . 64
8.2.3.2.2 Jitter buffer delay criteria . 64
8.2.3.2.3 Jitter induced concealment operations . 65
8.2.3.3 Delay and error profiles . 66
8.2.3.4 Speech material for JBM minimum performance evaluation . 66
8.3 Video . 66
8.4 Text . 66
9 Packet-loss handling . 67
9.1 General . 67
9.2 Speech . 67
9.2.1 General . 67
9.2.2 Transmitting redundant frames . 67
9.2.3 Receiving redundant frames . 70
9.3 Video . 71
9.3.1 General . 71
9.3.2 Receiver behaviour . 71
9.3.3 Sender behaviour . 71
9.4 Text . 71
10 Adaptation . 72
10.1 General . 72
10.2 Speech . 72
10.2.0 General . 72
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3GPP TS 26.114 version 12.17.0 Release 12 5 ETSI TS 126 114 V12.17.0 (2019-10)
10.2.1 RTCP-APP with codec control requests . 73
10.2.1.1 General . 73
10.2.1.2 General Format of RTCP-APP packet with codec control requests . 74
10.2.1.2a Padding . 75
10.2.1.3 Redundancy Request . 75
10.2.1.4 Frame Aggregation Request . 75
10.2.1.5 Codec Mode Request . 76
10.2.1.6 Generation of RTP payloads for multiple codec control requests . 77
10.2.1.7 EVS Primary Rate Request . 78
10.2.1.8 EVS Bandwidth Request . 79
10.2.1.9 EVS Channel Aware Request . 79
10.2.1.10 EVS Primary mode to EVS AMR-WB IO mode Switching Request . 80
10.2.1.11 EVS AMR-WB IO mode to EVS Primary mode Switching Request . 81
10.2.2 Example use cases . 81
10.2.3 SDP negotiation for RTCP-APP . 83
10.3 Video . 85
10.3.1 General . 85
10.3.2 Signaling mechanisms . 85
10.3.3 Adaptation triggers . 86
10.3.4 Sender behavior, downswitching . 86
10.3.4.1 Downswitching divided into phases . 86
10.3.4.2 Rate reduction phase . 87
10.3.4.3 Delay recovery phase . 88
10.3.5 Sender behavior, up-switching. 88
10.3.6 Receiver behavior, down-switching . 88
10.3.7 Receiver behavior, up-switch. 88
10.3.8 ECN triggered adaptation . 88
10.4 Text . 89
10.5 Explicit Congestion Notification . 90
11 Front-end handling . 90
11.1 General . 90
12 Inter-working . 91
12.1 General . 91
12.2 3G-324M . 92
12.2.1 General . 92
12.2.2 Codec usage . 92
12.2.2.1 General . 92
12.2.2.2 Text . 92
12.2.3 Payload format . 92
12.2.4 MTSI media gateway trans-packetization . 92
12.2.4.1 General . 92
12.2.4.2 Speech de-jitter buffer . 92
12.2.4.3 Video bi
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