| Abstract: | In this paper we describe our research work in GSM half-rate coding system for the pan-Europeandigital mobile cellular radio system. The system consists of a speech coder and a channel coder. An overview of thespeech coding algorithm is given. The channel coder uses CRC check and a convolutional code. Interleaving is usedto randomize the channel bursts. The proposed half-rate codec is implemented with a single TMS320C30. Theinformal tests (based on MOS score) prove that our speech coder is of higher quality. |
