Donald Bren School of Information and Computer Sciences

This report describes the design of a voice encoder/decoder (vocoder) based on the European GSM standard employing the system-level design methodology developed at UC Irvine. The project is a result of a cooperation between UCI and Motorola to demonstrate the SpecC methodology. Starting from the abstract executable specification written in SpecC different design alternatives concerning the system architecture (components and communication) are explored and the vocoder specification is gradually refined and mapped to a final HW/SW implementation such that the constraints are satisfied optimally. The final code for downloading onto the processors and the RTL hardware descriptions for synthesis of the ASICs are generated for the software and hardware parts, respectively.