3 Definitions and abbreviations

26.2233GPPMedia handling and interactionRelease 18Telepresence using the IP Multimedia Subsystem (IMS)TS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].

Conference: An IP multimedia session with two or more participants. Each conference has a "conference focus". A conference can be uniquely identified by a user. Examples for a conference could be a Telepresence or a multimedia game, in which the conference focus is located in a game server.

IM session: An IP multimedia (IM) session is a set of multimedia senders and receivers and the data streams flowing from senders to receivers. IP multimedia sessions are supported by the IP multimedia CN Subsystem and are enabled by IP connectivity bearers (e.g. GPRS as a bearer). A user may invoke concurrent IP multimedia sessions.

Telepresence: A conference with interactive audio-visual communications experience between remote locations, where the users enjoy a strong sense of realism and presence between all participants by optimizing a variety of attributes such as audio and video quality, eye contact, body language, spatial audio, coordinated environments and natural image size.

Telepresence System: A set of functions, devices and network elements which are able to capture, deliver, manage and render multiple high quality interactive audio and video signals in a Telepresence conference. An appropriate number of devices (e.g. cameras, screens, loudspeakers, microphones, codecs) and environmental characteristics are used to establish Telepresence.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply.
An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].

AS Application Server

AVC Advanced Video Coding

BFCP Binary Floor Control Protocol

CBP Constrained Baseline Profile

CHP Constrained High Profile

CLUE ControLling mUltiple streams for tElepresence

DTLS Datagram Transport Layer Security

FIR Full Intra Request

HEVC High Efficiency Video Coding

ICE Interactivity Connectivity Establishment

IDR Instantaneous Decoding Refresh

IRAP Intra Random Access Point

MCC Multiple Content Capture

MIME Multipurpose Internet Mail Extensions

MRFC Multimedia Resource Function Controller

MRFP Multimedia Resource Function Processor

MTSI Multimedia Telephony Service for IMS

PPS Picture Parameter Set

RTP Real-time Transport Protocol

SCTP Stream Control Transmission Protocol

SDP Session Description Protocol

SEI Supplemental Enhancement Information

SPS Sequence Parameter Set

SSRC Synchronization Source Identifier

TP Telepresence

TP UE TelePresence User Equipment

VPS Video Parameter Set

XML EXtensible Markup Language