TV show promotions, music artist promotions, lot- tery results, food and drink pictures and recipes,
Corporate
Flight schedules,
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
The development of mobile phones did not stop with iMelodies, and today, many Sony Ericsson phones (the J200 for example), come with
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
21 | November 2004 |