Sony Ericsson Walkman W580c, White Paper

Page: 53 / 58

White paper W580
53 June 2008
Abbreviations
3GPP™
3rd Generation Partnership Project
AAC
Advanced Audio Coding
AMR
Adaptive Multi Rate.
Audio format for speech sounds.
API
Application Programming Interface
ARPU
Average Revenue Per User
CS
Circuit Switched
CSD
Circuit Switched Data
CSS
Cascading Style Sheet
DRM
Digital Rights Management; controlling copying
and distribution of contents, with respect to intel-
lectual property rights.
DTMF or Touch Tone
Dual Tone Multi-Frequency signal – codes sent as
tone signals. Used for telephone banking, access-
ing an answering machine, etc.
EDGE
Enhanced Data rates for Global Evolution.
eAAC+
Enhanced Advanced Audio Coder, formerly known
as Enhanced Mpeg-4 AAC
e-GSM
Extended GSM. New frequencies specified by the
European Radio Communications Committee
(ERC) for GSM use when additional spectrum is
needed (Network-dependent). It allows operators
to transmit and receive just outside GSM’s core
900 frequency band. This extension gives
increased network capability.
EFR
Enhanced Full Rate, speech coding.
EMS
Enhanced Messaging Service. Allows the user to
add simple pixel pictures and animations, sounds
and melodies to a text message. The EMS 3GPP™
standard also includes text formatting.
ETSI
European Telecommunications Standards Institute.
FM
Frequency Modulation of the (radio) carrier wave.
FR
Full Rate, speech coding.
GIF
Graphics Interchange Format
GPRS
General Packet Radio Services