Multimedia; Audio Formats - Sony Ericsson P900 White Paper

Multimedia

Multimedia
The P900 has extensive multimedia capability in many applications. This section explains the different
standards supported and provides a summary of capability by application.

Audio Formats

The table below explains the various audio formats supported by the P900, together with indicative file sizes
for 60 seconds of playback.
Format Example
File Size
AAC 800 KB
(128 Kbps)
AMR 94 KB
(12.2 Kbps)
AU 5.2 MB
(22 kHz)
iMelody 6 KB
MIDI 20 KB
MP3 960 KB
(128 Kbps)
RMF 72 KB
WAV 5.2 MB
(22.05 kHz)
Description
Advanced Audio Coding. This is one of the audio compression formats
defined within the MPEG-2 and MPEG-4 standards. Compared to MP3 it
has more advanced features and is more efficient. AAC is commonly
used as an audio component of an MPEG-4 video file or stream. The
P900 Video Player can play AAC format audio, which is encoded into an
MPEG-4 file or stream.
Adaptive Multi Rate. AMR is a speech compression format that is highly
optimized for the mobile environment, requiring as little as 4.75 Kbps
bandwidth. AMR is used to convey voice recordings in MMS, 3GPP video
clips or streams. P900 records AMR using 12.2 Kbps with a sample rate
of 8kHz.
Similar to WAV, this is an audio format commonly used in the Macintosh,
Unix and Java worlds. It is not commonly used for content on mobile
devices.
A format commonly used for monophonic ringtones.
MIDI means Musical Instrument Digital Interface. MIDI specifies a format,
which describes music in a binary format, which may then be stored as a
file. Unlike the other formats, MIDI is not a recording of music but a
description, which enables a local synthesizer to play the music from the
instructions included in the MIDI file. MIDI is ideal for polyphonic
ringtones.
The P900 includes the Beatnik mini-BAE
providing support for General MIDI Level 1.
MPEG1 Layer 3 audio compression. MP3 is a very popular format for
portable players and downloading songs from the internet due to its
smaller file size. The compression achieved with MP3 files is a question
of size/quality compromises; a factor of 12 compression is typical.
TM
Rich Music Format . A file format developed by Beatnik combining the
compact size of MIDI files with the high quality of sampled sound.
This is typically used for short 'alert' sounds. The size of files is
determined by sample rate, bits-per-sample and mono/stereo.
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P900/P908 White Paper, December 2003
TM
(Beatnik Audio Engine)
LZT 108 6643 R1G