3 Definitions, symbols and abbreviations

26.1413GPPIP Multimedia System (IMS) Messaging and PresenceMedia formats and codecsRelease 17TS

3.1 Definitions

Deferred delivery messaging: A type of IMS Messaging service by which the sender expects the network to deliver the message as soon as the recipient becomes available.

Immediate messaging: A type of IMS Messaging service by which the sender expects immediate message delivery in (near) real time fashion.

IMS Messaging services: A group of services, supported by capabilities of the 3GPP IP Multimedia Subsystem 3GPP TS 22.228 [54], that allows an IMS user to send and receive messages to other users. IMS messaging services comprise of one or more types: Immediate messaging, Session based messaging and Deferred delivery messaging.

Session based messaging: A type of IMS Messaging service by which the sender expects immediate message delivery in (near) real time fashion. In addition the sender(s) and the receiver(s) have to join to a messaging session e.g. chat room, before message exchange can take place.

continuous media: media with an inherent notion of time, in the present document speech, audio, synthetic audio and video.

static media: media that itself does not contain an element of time, in the present document all media not defined as continuous media.

scene description: description of the spatial layout and temporal behaviour of a presentation, it can also contain hyperlinks.

3.2 Abbreviations

3GP 3GPP file format

AAC Advanced Audio Coding

AMR Adaptive Multi-rate Codec

CC/PP Composite Capability/Preference Profiles

CSI Combination of CS and IMS services

DLS Downloadable Sounds

Enhanced aacPlus MPEG-4 High Efficiency AAC plus MPEG-4 Parametric Stereo

EXIF Exchangeable image file format

GIF Graphics Interchange Format

IP Internet Protocol

IMS IP Multimedia Subsystem

ITU-T International Telecommunications Union – Telecommunications

JFIF JPEG File Interchange Format

JPEG Joint Picture Expert Group

MIDI Musical Instrument Digital Interface

MIME Multipurpose Internet Mail Extensions

MM Multimedia Message

MMS Multimedia Messaging Service

MPEG Motion Picture Expert Group

MP4 MPEG-4 file format

MTSI Multimedia Telephony Service for IMS

PSS Packet-switched Streaming Service

SBR Spectral Band Replication

SP-MIDI Scalable Polyphony MIDI

SVG Scalable Vector Graphics

UTF-8 Unicode Transformation Format (the 8-bit form)

XMF Extensible Music Format