Specifications

White Paper V800-Vodafone V802SE
24 August 2004
first play time as offset.
• SD – Separate Delivery
Encrypts and places the file in a shell with an
included ID. An additional file contains the same
type of license field as Combined Delivery with
a key. The file can only be unlocked for use
through WAP Push to a predefined server, com-
paring ID. The file is not allowed to be distrib-
uted.
It is possible to play unprotected files in the Media
player. However, all files provided by Vodafone
download services will be protected.
In Japan, only files with SD protection for playback
will be accepted in the media player.
Music
The Media player is a multi-format digital audio
player which enables the user to carry and play a
selection of favourite songs. A range of audio for-
mats are supported:
• AAC
Advanced Audio Coding. AAC is the latest
audio coding standard, defined in the MPEG-2
standard and is used for high-quality audio
compression. AAC provides higher quality than
MP3 at the same bit rate, or for the same audio
quality it uses a 30 per cent lower bit rate. It
supports the coding of multichannel audio, with
up to 48 main channels and 16 low-frequency
channels. The AAC offers three different profiles
to facilitate trade off between quality, memory
and processing power requirements. They
include: Main Profile (MP), Low Complexity (LC)
and Scalable Sampling Rate (SSR). AAC-LC is
also supported.
•AMR
Adaptive Multi Rate. A medium quality com-
pressed sound format. AMR-WB (Wide Band) is
supported.
•MIDI
Musical Instrument Digital Interface.
MIDI is not a recording of music, but a descrip-
tion which enables a local synthesizer to play
the music from the instructions included in the
MIDI file. Since a MIDI file only represents player
information, it is far more concise than formats
that store the sound directly. An advantage is
very small file sizes. A disadvantage is the lack
of specific sound control. MIDI is ideal for poly-
phonic ringtones.
•XMF
eXtended Music Format
XMF is a technology for collecting other music
and sound resources, such as Standard MIDI
Files, DLS instrument files, WAV or other digital
audio files. XMF does not describe musical
notes, notation, instrument sounds or audio
recordings. Instead, it allows content creators a
method to collect all those elements and put
them in a single file. In the end this means easier
handling and more consistent predictable play-
back.
•MP3
MP3 is the file extension for MPEG audio layer
3. Layer 3 is one of three coding schemes (layer
1, layer 2 and layer 3) for the compression of
audio signals. Layer 3 uses a very efficient com-
pression method, removing all irrelevant parts of
a sound signal that the human ear cannot per-
ceive. The result is, for example, CD digital
audio (CDDA) converted to MP3 with almost
untouched quality, compressed by a factor of
around 12. The high compression of audio in
MP3 files makes them relatively small, though
MP3 files can be created with different size and
quality compromises. The small file size,
together with the excellent sound quality, are
the main reasons for the MP3-format’s massive
popularity when sharing music over the Internet.
•WAV
Windows media audio video. A wave file is an
audio file format created by Microsoft, that has
become a standard PC audio file format for
everything from system and game sounds to
CD-quality audio. A wave file is identified by a
file name extension of WAV (.wav). Used prima-
rily in PCs, the wave file format has been
accepted as a viable interchange medium for
other computer platforms, such as Macintosh.
This allows content developers to freely move
audio files between platforms for processing, for
example.
In addition to the uncompressed raw audio
data, the wave file format stores information
about the file's number of tracks (mono or ste-
reo), sample rate, and bit depth.
• Windows Media Audio
The format used by Microsoft Windows Media
Technologies (or a third-party product that
incorporates a licensed Windows Media tech-
nology) to author, store, edit, distribute, stream,
or play timeline-based content.