TR 26.980
SA4
★
Media Handling aspects
of Multi-Stream Multiparty Conferencing
for MTSI
use "3GPP‑Page" to get the Word version
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
V15.0.0 (PDF)
2018/06 86 p.
V14.2.0
2017/03 88 p.
V13.0.0
2015/12 63 p.
Rapporteur: Mr. Leung, Nikolai
This TR provides a study on the media handling aspects of Multi-stream Multiparty Conferencing for
MTSI. The study focuses on enabling
High-level use cases along with current limitations and recommendations are documented in the present document.
- support to receive multi-stream audio/video at the terminals in a multiparty conferencing,
- support for at least two video contents, e.g. one main and one presentation,
- talker ID provisioning,
- compatibility with MTSI TS 26.114 and GSMA IR.94 (Video over LTE) and GSMA IR.92 (VoLTE), and
- applicability to both mobile and fixed access terminals.
full Table of Contents for TR 26.980 Word version: 15.0.0
1 Scope Word-p. 7
2 References
3 Definitions and abbreviations Word-p. 9
4 Overview
5 Media Handling in Current 3GPP Conferencing
6 Use cases Word-p. 12
6.1 Overview
6.2 Use case A: Transcoding Free Continuous Presence
6.3 Use case B: Screen Sharing Word-p. 14
6.4 Use Case C: Bandwidth Handling Word-p. 17
6.17 Use Case P: Codec Migration [R14] Word-p. 60
7 Conclusion Word-p. 64
A SDP examples for Multi-stream Multiparty Conference Media Handling Word-p. 65
6.4.1 Problem Description
6.4.2 Proposed Solution
6.5 Use Case D: Active Speaker Override Word-p. 21
6.6 Use Case E: Pausing Unused Streams Word-p. 23
6.7 Use Case F: Conference Rate Adaptation Considerations Word-p. 26
6.8 Use Case G: Multi-stream Audio Steering or Panning Word-p. 29
6.9 Use Case H: De-jitter Buffer Handling Word-p. 30
6.10 Use Case I: Audio Spatialization based on head-tracking Word-p. 31
6.11 Use Case J: Mixing at the Rendering Device - Media Handling, Distribution via Multi-Unicast Word-p. 32
6.12 Use Case K: Mixing at the Rendering Device - Media Handling, Distribution via Multicast Word-p. 35
6.13 Use Case L: Mixing at the Rendering Device - Media Handling, Distribution via Single Source Multi-Unicast Word-p. 36
6.4.2.1 Single-stream to multi-stream Word-p. 18
6.4.2.2 Multi-stream to single-stream
6.4.2.3 Multi-stream to multi-stream without bandwidth restriction
6.4.2.4 Multi-stream to multi-stream with minor bandwidth restrictions Word-p. 19
6.4.2.5 Multi-stream to multi-stream with severe bandwidth restriction Word-p. 20
6.4.2.6 Multi-stream UE to multi-stream UE in point-to-point
6.4.2.4 Multi-stream to multi-stream with minor bandwidth restrictions Word-p. 19
6.4.2.5 Multi-stream to multi-stream with severe bandwidth restriction Word-p. 20
6.4.2.6 Multi-stream UE to multi-stream UE in point-to-point
6.13.1 Session Establishment Word-p. 38
6.13.2 Media Handling
6.13.3 Multi-stream Concurrent Encoding/Decoding Capabilities [R14]
6.14 Use Case M: Provisioning of Talker ID Word-p. 45
6.15 Use Case N: Mixing at the Rendering Device - Media Handling, Concurrent Codec Capabilities Exchange Word-p. 47
6.13.3 Multi-stream Concurrent Encoding/Decoding Capabilities [R14]
6.13.3.1 Querying and Capabilities Exchange - SIP OPTIONS Word-p. 39
6.13.3.2 Common/Preferred Codec Identification and Usage Word-p. 42
6.13.4 MSMTSI MRF Handling with Reduced m-lines [R14]
6.15.1 Format of the Concurrent Codec Capabilities Information
6.15.2 Protocol for Concurrent Codec Capabilities Exchange (CCCEx)
6.15.3 Examples of Concurrent Codec Capabilities (CCC) Usage
6.15.4 Compact CCC SDP Parameter for Session Initiation [R14] Word-p. 56
6.16 Use Case O: Media Distribution Without Conference Focus - Session Establishment Aspects
6.15.4.1 Introduction
6.15.4.2 Compression Gains
6.15.4.3 Offer-Answer Rules Word-p. 58
6.15.4.4 Conclusions Word-p. 59
6.17 Use Case P: Codec Migration [R14] Word-p. 60
A.1 General
A.2 MSMTSI video offer/answer examples
B QoS for Multi-stream Multiparty Conference Media Handling [R14] Word-p. 80
C Technical Background [R14] Word-p. 81
D Change history Word-p. 84
A.2.1 MSMTSI offer/answer towards an MTSI client
A.2.2 MSMTSI answer from an MSMTSI MRF Word-p. 67
A.2.3 MSMTSI answer from an MSMTSI client in terminal Word-p. 70
A.2.4 MSMTSI Offer and Answer Using Codec Simulcast [R14] Word-p. 71
A.3 MSMTSI audio offer/answer examples Word-p. 73
