In this thesis, hardware implementation of a digital audio response system has been studied. The study has proceeded in three steps as follows. First, linear predictive coding (LPC) and residual excited linear prediction(RELP) vocoding method have been studied. Second, system realization has been made using INTEL 8085 peripherals and AMD 2900 series bit slice microprocessors. The hardware consists of a I/O board, a controller board and a synthesizer board. Third, system firmware has been implemented by 8085 assembly language and microprogramming.
The audio response system is intended for use of answering telephone number inquires directly from computer, but it can be used for other purposes with minor software modification.
The quality of synthetic speech of the voice response system developed is excellent. In fact, it is far superior to other commercially available speech synthesizers.
