Polyphonic ringtones, Protocol, Corporate

TV show promotions, music artist promotions, lot- tery results, food and drink pictures and recipes, mood-related pictures.

Corporate

Flight schedules, pre-installed corporate logos, map snippets and travel info, company branded icons and ring tones, corporate e-mail notifications, affinity programmes where companies notify cus- tomers of product updates, banks notifying cus-

White Paper J200

tomers about new services and interest rates, call centres providing answers to questions about a product, vehicle positioning combining EMS with Global Positioning System (GPS) position informa- tion, job dispatch with delivery addresses for sales or courier package delivery, using EMS in a retail environment for credit card authorization, remote monitoring of machines for service and mainte- nance purposes.

Polyphonic ringtones

Early Ericsson mobile phones supported a proprie- tary non-polyphonic format called eMelody. Owing to the musical limitations of eMelody, and the pop- ularity of creating, sending, and downloading ring melodies, Ericsson and Sony Ericsson, together with other manufacturers created the more advanced non-polyphonic sound format – iMelody.

The development of mobile phones did not stop with iMelodies, and today, many Sony Ericsson phones (the J200 for example), come with built-in support for polyphonic sounds and ringtones, using the MIDI and SMAF formats.

MIDI – Musical Instrument Digital Interface – is a specification for a communications protocol princi- pally used to control electronic musical instru- ments. MIDI is today a well known standard used by musicians, composers, and arrangers.

A MIDI signal or file does not contain any music. It contains text information as binary data about what, when, and how an instrument or melody is played. When this data reaches a synthesizer, the synthesizer translates it into music.

The development from the iMelody format to the MIDI format is a revolution in the sound quality. The MIDI files are small, and perfect for mobile devices, which have limited storage capacity.

Protocol

The J200 has a hardware synthesizer chip, built into the mobile phone. The software controls the MIDI files, and makes sure they fit into the hard- ware chip. It is possible to modify the dynamics of the sound.

The J200 supports the MIDI 1.0 detailed specifica- tion. Please visit www.midi.com for more informa- tion.

Also, the SMF0, SMF1 and SMAF formats are sup- ported. SMAF, which is a multimedia data format invented by the YAMAHA® CORPORATION, stands for "Synthetic music Mobile Application

Format". The SMAF specification defines a format for multimedia files which can be played back on handheld portable devices. Please visit smaf-yamaha.com for more information.

21	November 2004