Content for TR 26.862 Word version: 17.0.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
3.1 Terms
3.2 Symbols
3.3 Abbreviations
...
...
1 Scope p. 5
The present document collects information regarding the "support of Immersive Teleconferencing and Telepresence for Remote Terminals" (ITT4RT) in 3GPP MTSI. The primary scope of the present document is the documentation of the following aspects:
2 References p. 5
The following documents contain provisions which, through reference 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. 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]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 26.071: "Mandatory Speech Codec speech processing functions; AMR Speech CODEC; General description".
[3]
TS 26.190: "Speech codec speech processing functions; Adaptive Multi-Rate - Wideband (AMR-WB) speech codec; Transcoding functions".
[4]
TS 26.441: "Codec for Enhanced Voice Services (EVS); General Overview".
[5]
TS 26.171: "Speech codec speech processing functions; Adaptive Multi-Rate - Wideband (AMR-WB) speech codec; General description".
[6]
TS 26.118: "3GPP Virtual reality profiles for streaming applications".
[7]
TS 26.114: "IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction".
[8]
TS 26.223: "Telepresence using the IP Multimedia Subsystem (IMS); Media handling and interaction".
[9]
RFC 7728 (2016): "RTP Stream Pause and Resume".
[10]
TS 26.238: "Uplink streaming".
[11]
draft-ietf-rtcweb-data-channel-13 (2015) "WebRTC Data Channels" (WORK IN PROGRESS)
[12]
ISO/IEC 23008-12: Information technology - MPEG systems technologies - Part 12: Image File Format
[13]
ISO/IEC 23090-8: "Information technology -- Coded representation of immersive media -- Part 8: Network-based media processing".
3 Definitions of terms, symbols and abbreviations p. 6
3.1 Terms p. 6
For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
360-degree video:
A real-world visual scene captured by a set of cameras or a camera device with multiple lenses and sensors covering the sphere in all directions around the centre point of the camera set or camera device.
Bitstream:
A bitstream that conforms to a video or audio encoding format.
bitstream:
A sequence of bits that forms the representation of one or more coded video or audio sequences.
CHEM:
The Coverage and Handoff Enhancements using Multimedia error robustness feature.
Field of View:
The extent of visible area expressed with vertical and horizontal angles, in degrees in the 3GPP 3DOF reference system as defined in TS 26.118.
ITT4RT client:
MTSI client supporting the Immersive Teleconferencing and Telepresence for Remote Terminals (ITT4RT) feature, as defined in Annex Y.
ITT4RT-Tx client:
ITT4RT client only capable of sending immersive video.
ITT4RT-Rx client:
ITT4RT client only capable of receiving immersive video
ITT4RT MRF:
An ITT4RT client implemented by functionality included in the MRFC and the MRFP.
ITT4RT client in terminal:
An ITT4RT client that is implemented in a terminal or UE. The term "ITT4RT client in terminal" is used in this document when entities such as ITT4RT MRF is excluded.
MSMTSI client:
A multi-stream capable MTSI client supporting multiple streams as defined in Annex S. An MTSI client may support multiple streams, even of the same media type, without being an MSMTSI client. Such an MTSI client may, for example, add a second video to an ongoing video telephony session as shown in Annex A.11. In that case, the MTSI client is an MSMTSI client only if it is fully compliant with Annex S.
MSMTSI MRF:
An MSMTSI client implemented by functionality included in the MRFC and the MRFP.
Omnidirectional media:
Media such as image or video and its associated audio that enable rendering according to the user's viewing orientation, if consumed with a head-mounted device, or according to user's desired viewport, otherwise, as if the user was in the spot where and when the media was captured.
Overlay:
A piece of visual media, rendered over omnidirectional video or image, or a viewport.
Pose:
Position and rotation information associated to a viewport.
Projected picture:
Picture that has a representation format specified by an omnidirectional video projection format.
Projection:
Inverse of the process by which the samples of a projected picture are mapped to a set of positions identified by a set of azimuth and elevation coordinates on a unit sphere.
Viewport:
Region of omnidirectional image or video suitable for display and viewing by the user.
3.2 Symbols p. 6
3.3 Abbreviations p. 7
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
ITT4RT
Immersive Teleconferencing and Telepresence for Remote Terminals
AR
Augmented Reality
AS
Application Server
DTLS
Datagram Transport Layer Security
FLUS
Framework for Live Uplink Streaming
FoV
Field of View
FFS
For future study
GSM
Global System for Mobile Communications
HEIF
High Efficiency Image File Format
HEVC
High Efficiency Video Coding
HMD
Head-Mounted Display
IMS
IP Multimedia Subsystem
IP
Internet Protocol
ITT4RT
Immersive Teleconferencing and Telepresence for Remote Terminals
LTE
Long-Term Evolution
MCU
Multipoint Control Unit
MEF
Maintenance Entity Function
MPEG
Moving Picture Experts Group
MRF / MRFC
Multimedia Resource Function Controller
MSMTSI
Multi-Stream Multimedia Telephony Service for IMS
MTSI
Multimedia Telephony Service for IMS
NAL
Network Abstraction Layer
NBMP
Network-based Media Processing
OMAF
Omnidirectional Media Format
RTP / RTCP
Real-Time Transport (Control) Protocol
SCTP
Stream Control Transmission Protocol
SDP
Session Description Protocol
SEI
Supplemental Enhancement Information message
SIP
Session Initiation Protocol
SMS
Short Message Service
UE
User Equipment
UMTS
Universal Mobile Telecommunications System
VR
Virtual Reality
