ETSI TS 126 114 V13.8.0 (2019-05)

Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114 version 13.8.0 Release 13)

RTS/TSGS-0426114vd80

General Information

• Status: Published
• Publication Date: 02-May-2019
• Technical Committee: 3GPP SA 4 - Codec
• Current Stage: 12 - Completion
• Completion Date: 03-May-2019

Standards Content (Sample)

ETSI TS 126 114 V13.8.0 (2019-05)






TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
IP Multimedia Subsystem (IMS);
Multimedia telephony;
Media handling and interaction
(3GPP TS 26.114 version 13.8.0 Release 13)

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3GPP TS 26.114 version 13.8.0 Release 13 1 ETSI TS 126 114 V13.8.0 (2019-05)



Reference
RTS/TSGS-0426114vd80
Keywords
LTE,UMTS
ETSI
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3GPP TS 26.114 version 13.8.0 Release 13 2 ETSI TS 126 114 V13.8.0 (2019-05)
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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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
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 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 26.114 version 13.8.0 Release 13 3 ETSI TS 126 114 V13.8.0 (2019-05)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 15
Introduction . 15
1 Scope . 16
2 References . 16
3 Definitions and abbreviations . 23
3.1 Definitions . 23
3.2 Abbreviations . 24
4 System description . 26
4.1 System . 26
4.2 Client . 26
4.3 MRFP and MGW . 28
5 Media codecs . 28
5.1 Media components . 28
5.2 Codecs for MTSI clients in terminals . 29
5.2.1 Speech . 29
5.2.1.1 General codec requirements . 29
5.2.1.2 Detailed codec requirements, AMR . 29
5.2.1.3 Detailed codec requirements, AMR-WB . 29
5.2.1.4 Detailed codec requirements, EVS . 30
5.2.1.5 Offering multiple audio bandwidths and multiple channels . 30
5.2.1.6 Codec preference order . 30
5.2.2 Video . 30
5.2.3 Real-time text . 32
6 Media configuration . 32
6.1 General . 32
6.2 Session setup procedures . 33
6.2.1 General . 33
6.2.1a RTP profile negotiation . 33
6.2.1a.1 General . 33
6.2.1a.2 Using SDPCapNeg in SDP offer . 33
6.2.1a.3 Answering to an SDP offer using SDPCapNeg . 34
6.2.2 Speech . 34
6.2.2.1 General . 34
6.2.2.2 Generating SDP offers . 35
6.2.2.3 Generating SDP answer . 38
6.2.3 Video . 46
6.2.3.1 Introduction . 46
6.2.3.2 Common Session Setup Procedures . 47
6.2.3.3 Coordination of Video Orientation (CVO) . 48
6.2.3.4 Video Region-of-Interest (ROI) . 48
6.2.3.5 RTP Retransmission . 51
6.2.3.6 Forward Error Correction (FEC) . 51
6.2.4 Text . 51
6.2.5 Bandwidth negotiation . 52
6.2.5.1 General . 52
6.2.5.2 Speech . 53
6.2.5.3 Video . 55
6.2.6 The Synchronization Info attribute "3gpp_sync_info" . 56
6.2.7 Negotiated QoS parameters . 57
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3GPP TS 26.114 version 13.8.0 Release 13 4 ETSI TS 126 114 V13.8.0 (2019-05)
6.2.7.1 General . 57
6.2.7.2 Alignment of negotiated QoS parameters and b=AS bandwidth modifier . 57
6.2.7.3 Alignment of negotiated QoS parameters and a=bw-info attribute . 58
6.3 Session control procedures . 58
7 Data transport . 59
7.1 General . 59
7.2 RTP profiles . 59
7.3 RTCP usage . 59
7.3.1 General . 59
7.3.2 Speech . 60
7.3.3 Video . 61
7.3.4 Real-time text . 62
7.3.5 Void . 62
7.3.6 Reduced-Size RTCP . 62
7.3.7 Video Region-of-Interest (ROI) Signaling . 63
7.4 RTP payload formats for MTSI clients . 65
7.4.1 General . 65
7.4.2 Speech . 66
7.4.3 Video . 67
7.4.4 Real-time text . 67
7.4.5 Coordination of Video Orientation . 67
7.4.6 RTP Retransmission . 70
7.4.7 Forward Error Correction (FEC) . 70
7.5 Media flow . 70
7.5.1 General . 70
7.5.2 Media specific . 70
7.5.2.1 Speech . 70
7.5.2.1.1 General . 70
7.5.2.1.2 Default operation . 70
7.5.2.1.2.1 General . 70
7.5.2.1.2.2 Codec Mode Requests. 71
7.5.2.1.2.3 Frame aggregation and redundancy . 71
7.5.2.1.3 HSPA . 71
7.5.2.1.4 EGPRS. 71
7.5.2.1.5 GIP . 72
7.5.2.1.6 Initial codec mode for AMR and AMR-WB . 72
7.5.2.1.7 E-UTRAN . 72
7.5.2.1.8 Initial codec mode for EVS . 73
7.5.2.1.9 Dual-mono . 73
7.5.2.2 Video . 73
7.5.2.3 Text . 73
7.5.3 Media synchronization . 73
7.5.3.1 General . 73
7.5.3.2 Text . 74
7.5.4 ECN usage in RTP sessions . 74
7.5.5 Handling of bit-rate variations . 74
7.5.5.1 General . 74
7.5.5.2 Video . 74
7.5.5.3 Speech . 75
8 Jitter buffer management in MTSI clients in terminals . 75
8.1 General . 75
8.2 Speech . 75
8.2.1 Terminology . 75
8.2.2 Functional requirements for jitter-buffer management . 76
8.2.3 Minimum performance requirements for jitter-buffer management . 76
8.2.3.1 General . 76
8.2.3.2 Objective performance requirements . 77
8.2.3.2.1 General . 77
8.2.3.2.2 Jitter buffer delay criteria . 77
8.2.3.2.3 Jitter induced concealment operations . 78
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3GPP TS 26.114 version 13.8.0 Release 13 5 ETSI TS 126 114 V13.8.0 (2019-05)
8.2.3.3 Delay and error profiles . 79
8.2.3.4 Speech material for JBM minimum performance evaluation . 79
8.3 Video . 79
8.4 Text . 79
9 Packet-loss handling . 80
9.1 General . 80
9.2 Speech . 80
9.2.1 General . 80
9.2.2 Transmitting redundant frames . 80
9.2.3 Receiving redundant frames . 83
9.3 Video . 84
9.3.1 General . 84
9.3.2 Receiver behaviour . 84
9.3.3 Sender behaviour . 84
9.3.4 Recommendations for packet loss recovery mechanisms usage . 85
9.4 Text . 85
10 Adaptation . 86
10.1 General . 86
10.2 Speech . 86
10.2.0 General . 86
10.2.1 RTCP-APP with codec control requests . 87
10.2.1.1 General . 87
10.2.1.2 General Format of RTCP-APP packet with codec control requests . 88
10.2.1.2a Padding . 89
10.2.1.3 Redundancy Request . 89
10.2.1.4 Frame Aggregation Request . 89
10.2.1.5 Codec Mode Request . 90
10.2.1.6 Generation of RTP payloads for multiple codec control requests . 91
10.2.1.7 EVS Primary Rate Request . 92
10.2.1.8 EVS Bandwidth Request . 93
10.2.1.9 EVS Channel Aware Request . 93
10.2.1.10 EVS Primary mode to EVS AMR-WB IO mode Switching Request . 94
10.2.1.11 EVS AMR-WB IO mode to EVS Primary mode Switching Request . 95
10.2.2 Example use cases . 95
10.2.3 SDP negotiation for RTCP-APP . 97
10.3 Video . 99
10.3.1 General . 99
10.3.2 Signaling mechanisms . 99
10.3.3 Adaptation triggers . 100
10.3.4 Sender behavior, downswitching . 100
10.3.4.1 Downswitching divided into phases . 100
10.3.4.2 Rate reduction phase . 101
10.3.4.3 Delay recovery phase .
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