ETSI TS 126 114 V14.11.0 (2019-10)

Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114 version 14.11.0 Release 14)

RTS/TSGS-0426114veb0

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 V14.11.0 (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 14.11.0 Release 14)

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3GPP TS 26.114 version 14.11.0 Release 14 1 ETSI TS 126 114 V14.11.0 (2019-10)



Reference
RTS/TSGS-0426114veb0
Keywords
LTE,UMTS
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3GPP TS 26.114 version 14.11.0 Release 14 2 ETSI TS 126 114 V14.11.0 (2019-10)
Intellectual Property Rights
Essential patents
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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
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
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Modal verbs terminology
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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 14.11.0 Release 14 3 ETSI TS 126 114 V14.11.0 (2019-10)
Contents
Intellectual Property Rights . 2
Legal Notice . 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 . 34
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 . 54
6.2.5.3 Video . 56
6.2.6 The Synchronization Info attribute "3gpp_sync_info" . 57
6.2.7 Negotiated QoS parameters . 58
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3GPP TS 26.114 version 14.11.0 Release 14 4 ETSI TS 126 114 V14.11.0 (2019-10)
6.2.7.1 General . 58
6.2.7.2 Alignment of negotiated QoS parameters and b=AS bandwidth modifier . 58
6.2.7.3 Alignment of negotiated QoS parameters and a=bw-info attribute . 59
6.3 Session control procedures . 59
7 Data transport . 60
7.1 General . 60
7.2 RTP profiles . 60
7.3 RTCP usage . 60
7.3.1 General . 60
7.3.2 Speech . 61
7.3.3 Video . 62
7.3.4 Real-time text . 63
7.3.5 Void . 63
7.3.6 Reduced-Size RTCP . 63
7.3.7 Video Region-of-Interest (ROI) Signaling . 64
7.4 RTP payload formats for MTSI clients . 67
7.4.1 General . 67
7.4.2 Speech . 67
7.4.3 Video . 68
7.4.4 Real-time text . 68
7.4.5 Coordination of Video Orientation . 69
7.4.6 RTP Retransmission . 71
7.4.7 Forward Error Correction (FEC) . 71
7.5 Media flow . 71
7.5.1 General . 71
7.5.2 Media specific . 71
7.5.2.1 Speech . 71
7.5.2.1.1 General . 71
7.5.2.1.2 Default operation . 71
7.5.2.1.2.1 General . 71
7.5.2.1.2.2 Codec Mode Requests. 72
7.5.2.1.2.3 Frame aggregation and redundancy . 72
7.5.2.1.3 HSPA . 72
7.5.2.1.4 EGPRS. 73
7.5.2.1.5 GIP . 73
7.5.2.1.6 Initial codec mode for AMR and AMR-WB . 73
7.5.2.1.7 E-UTRAN . 74
7.5.2.1.8 Initial codec mode for EVS . 74
7.5.2.1.9 Dual-mono . 74
7.5.2.2 Video . 74
7.5.2.3 Text . 74
7.5.3 Media synchronization . 75
7.5.3.1 General . 75
7.5.3.2 Text . 75
7.5.4 ECN usage in RTP sessions . 75
7.5.5 Handling of bit-rate variations . 75
7.5.5.1 General . 75
7.5.5.2 Video . 76
7.5.5.3 Speech . 76
8 Jitter buffer management in MTSI clients in terminals . 76
8.1 General . 76
8.2 Speech . 76
8.2.1 Terminology . 76
8.2.2 Functional requirements for jitter-buffer management . 78
8.2.3 Minimum performance requirements for jitter-buffer management . 78
8.2.3.1 General . 78
8.2.3.2 Objective performance requirements . 79
8.2.3.2.1 General . 79
8.2.3.2.2 Jitter buffer delay criteria . 79
8.2.3.2.3 Jitter induced concealment operations . 80
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3GPP TS 26.114 version 14.11.0 Release 14 5 ETSI TS 126 114 V14.11.0 (2019-10)
8.2.3.3 Delay and error profiles . 81
8.2.3.4 Speech material for JBM minimum performance evaluation . 81
8.3 Video . 81
8.4 Text . 81
9 Packet-loss handling . 82
9.1 General . 82
9.2 Speech . 82
9.2.1 General . 82
9.2.2 Transmitting redundant frames . 82
9.2.3 Receiving redundant frames . 85
9.3 Video . 86
9.3.1 General . 86
9.3.2 Receiver behaviour . 86
9.3.3 Sender behaviour . 86
9.3.4 Recommendations for packet loss recovery mechanisms usage . 87
9.4 Text . 88
10 Adaptation . 88
10.1 General . 88
10.2 Speech . 88
10.2.0 General . 88
10.2.1 RTCP-APP with codec control requests . 90
10.2.1.1 General . 90
10.2.1.2 General Format of RTCP-APP packet with codec control requests . 90
10.2.1.2a Padding . 91
10.2.1.3 Redundancy Request . 91
10.2.1.4 Frame Aggregation Request . 92
10.2.1.5 Codec Mode Request . 92
10.2.1.6 Generation of RTP payloads for multiple codec control requests . 93
10.2.1.7 EVS Primary Rate Request . 94
10.2.1.8 EVS Bandwidth Request . 95
10.2.1.9 EVS Channel Aware Request . 95
10.2.1.10 EVS Primary mode to EVS AMR-WB IO mode Switching Request . 96
10.2.1.11 EVS AMR-WB IO mode to EVS Primary mode Switching Request . 97
10.2.2 Example use cases . 97
10.2.3 SDP negotiation for RTCP-APP . 99
10.3 Video . 101
10.3.1 General . 101
10.3.2 Signaling mechanisms . 101
10.3.3 Adaptation triggers . 102
10.3.4 Sender behavior, downswitching . 103
10.3.4.1 Downswitching divided into phases . 103
10.3.4.2 Rate reduction phase . 103
10.3.4.3 Delay recovery phase .
...