The handset, made by Fujitsu Ltd, contains new & proprietary technology to enter e-mail text using remote speech recognition. If the "voice input" button in the e-mail editing display is pressed, software that extracts the characteristics of the user's speech (and performs Analog-to-Digital conversion) will start, and access the DoCoMo's i-mode site.
When users say what they want transcribed into an email, the in-box software sends the dictation to the i-mode server. There, speech recognition software manufactured by Advanced Media Inc outputs transcribed text. The F884i receives the transcribed text, displays it in the email's text display interface.
As best we can tell, without a direct response from DoCoMo or Advanced Media - This appears to be DSR (Distributed Speech Recognition) which we've blogged about in the past; and we are tremendous fans of DSR as a global answer to near-perfect mobile speech recognition.
We've also emailed David Pearce, founder and Chief Developer of this emerging technology to see if he has any information on whether this may, in fact be DSR..
Check back later for details!