UNIFIED MESSAGING SYSTEM WITH AUTOMATIC LANGUAGE IDENTIFICATION FOR TEXT-TO-SPEECH CONVERSION

摘要

A unified messaging system includes a voice gateway server coupled to an electronics mail system and a private branch exchange (PBX). The voice gateway s erver provides voice messaging services to a set of subscribers. Within the voice gate way server, a trigraph analyzer sequentially examines 3-character combinations withi n a text message; determines occurrence frequencies for the character combinations; compa res the occurrence frequencies with reference occurrence statistics modeled from tex t samples written in particular languages; and generates a language identifier and a likelihood value for the text message. Based upon the language identifier, a mes sage inquiry unit selects an appropriate text-to-speech engine for converting the tex t message into computer-generated speech that is played to a subscriber.