A development of the stand-alone Audiotex system

Audiotex is a general system that combines computers and telephones to deliver audio information by adopting text-to-speech (TTS) technology. The TTS is a technology that converts text messages into synthetic speech based on both linguistic analysis of the text and the acoustic knowledge of the production of speech sounds. This paper describes the architecture and features of the Korean stand-alone Audiotex system. In this system, we adopt the pitch synchronous overlap and add (PSOLA) algorithm as the synthesis method. The system is composed of a public switched telephone network interface unit, a main control unit, a data interface unit, and a TTS synthesis unit. It can be applied to a variety of reading services when connected to a host computer and a telephone network