Abbreviations - Sony Ericsson Walkman W380 White Paper

Abbreviations

3GPP
3rd Generation Partnership Project
AAC
Advanced Audio Coding, a lossy audio coding
scheme. AAC+ and eAAC is high efficiency audio
coding.
AMR
Adaptive Multi-Rate, a lossy coding scheme.
API
Application Programming Interface
DRM
Digital Rights Management. Controlling copying
and distribution of contents, with respect to
intellectual property rights.
DTMF or Touch Tone
Dual Tone Multi-Frequency signal. Codes sent as
tone signals. Used for telephone banking,
accessing an answering machine and so on.
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 provides increased
network capability.
EDR
Enhanced Data Rate
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
GSM
Global System for Mobile Communications. GSM
is the world's most widely used digital mobile
phone system, now operating in over 100 countries
around the world, particularly in Europe and Asia-
Pacific.
The GSM system family includes GSM 850, GSM
900, GSM 1800 and GSM 1900. There are different
phases of roll-out for the GSM system and GSM
phones are either phase 1 or phase 2 compliant.
HR
Half Rate, speech coding.
HTML
HyperText Markup Language
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White paper W380
April 2008