Recently, human computer interaction system which involves speech recognition, synthesis etc. experiences tremendous growth, resulting in many applications being developed and commercialized. For instance, Microsoft recently launched the Microsoft Office that process the capability to pronounce (or read aloud)the input text using the speech synthesis engine. Indeed, speech synthesis is of important assisting human in various areas such as telephone speech, application in cars, public information systems, education assistance tools, email reading etc. Text to Speech (TTS) system is speech...