Sound Recorder; Polyphonic Ringtones; Video Clips - Sony Ericsson D750i White Paper

The media player is intelligently aware of other
applications in the phone:
• Playback is paused when a telephone call is
made or received.
• Playback is paused if the user starts another
application which requires the audio channels to
be dedicated to it.
• Playback of MP3 files continues if the user
switches to another application, providing
music whilst using other applications such as
the calendar or contacts, or playing games.

Polyphonic ringtones

Background
The word "polyphony" means pro-
ducing several tones at the same
time. Almost all music that we listen
to consists of polyphonic melodies.
Early Ericsson mobile phones supported a proprie-
tary non-polyphonic format called eMelody. Due to
the musical limitations of eMelody, and the popu-
larity of creating, sending and downloading ring
melodies, Ericsson and Sony Ericsson, together
with other manufacturers, created the more
advanced but non-polyphonic sound format – iMel-
ody.
The introduction of the MIDI format revolutionized
sound quality. MIDI files are small, and perfect for
mobile devices, which have limited storage capac-
ity.
MIDI is a specification for a communications proto-
col principally used to control electronic musical
instruments. MIDI is today a well known standard
used by many musicians, composers and arrang-
ers.
A MIDI signal or file does not contain any music. It
contains binary data (information) of how a melody
is played and when this data reaches a synthesizer,
the synthesizer will translate the binary data to
music, when connected to an amplifier with speak-
ers so that the sound becomes audible.
Please visit www.midi.org for more information.
SP-MIDI
SP-MIDI stands for Scalable Polyphony MIDI. SP-
MIDI is based on the MIDI format and adapted for
mobile phones and other portable products. The
objective is to secure inter operability between
products with different sound capabilities.

Sound recorder

The sound recorder can record both voice memos
and call conversations. Sound recorder saves
recordings directly to memory. The size and length
of recordings are limited by available storage
space.
Sounds are recorded in AMR format and saved in
Sounds. Recorded sounds can also be set as ring-
tones.

Video clips

Moments can easily be shared with friends and
family in other geographical sites by capturing the
moment with the video recorder and then sending
the video clip in a picture message. The video
recorder supports QCIF.
The media player supports download and playback
of MPEG-4 and H.263 formats for viewing video
clips in the phone.
Video clips may be downloaded from the Internet
or copied from a connected computer.
Files must be of types MP4 or 3GP, having video
encoded in MPEG-4 Simple Visual Profile and
audio in AAC or AMR format. Video can be
encoded in H.263. The phone encodes video in
H.263 Profile 0 Level 10 format.
Streaming support
The media player can be launched from hyperlinks
in the WAP browser, SDP files in the file manager or
in messages through hyperlinks. Content is
streamed using RTSP (Real Time Streaming Proto-
col) session control.
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White Paper D750i
March 2005