Abstract: In this paper we try to explore various Text-to-Speech synthesis techniques developed and implemented by several speech synthesis researchers and research groups over the world during the last decades. Few Text-to-Speech synthesizer software and hardware’s are mentioned with its features. Today’s most popular device smart phone has capabilities to read a text and e-book aloud. A continues research is going on speech smoother with the help of one of the key approaches i.e. statistical parametric approach to speech synthesis. This paper aims to give an overview of speech synthesis in Indian languages, summarizes and compares the characteristics of various synthesis techniques used.

Keywords: Text processing, Text-To-Speech (TTS) synthesizer, Speech Enhancement.