Text to speech for Bangla language using festival

Abstract

In this paper, we present a Text to Speech (TTS) synthesis system for Bangla language using the open-source Festival TTS engine. Festival is a complete TTS synthesis system, with components supporting front-end processing of the input text, language modeling, and speech synthesis using its signal processing module. The Bangla TTS system proposed here, creates the voice data for festival, and additionally extends festival using its embedded scheme scripting interface to incorporate Bangla language support. Festival is a oncatenative TTS system using diphone or other unit selection speech units. Our TTS implementation uses two different kinds of these concatenative methods supported in Festival: unit selection and multisyn unit selection. The function of a Text-to-Speech system is to convert some language text into its spoken equivalent by a series of modules. These modules, constituting the TTS system are described in detail which is very much helpful for future development. Finally, the quality of synthesized speech is assessed in terms of acceptability and intelligibility.