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KMID : 0917520030100020065
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Journal of Speech Sciences
2003 Volume.10 No. 2 p.65 ~ p.75
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Real-time Implementation of G.723.1A Speech Coder Using a TMS320VC5402 DSP
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Lee Song-Chan
Chung Ik-Joo
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Abstract
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This paper describes the issues associated with the real-time implementation of G.723.1A dual-rate speech coder on a TMS320VC5402 DSP. Firstly, the main features of the G.723.1A speech coder and the procedure involved in the implementation using assembly and C languages are discussed. Various real-time implementation issues such as memory/MIPS tradeoffs are also presented. For fixed-point implementation, we converted the ITU-T fixed-point ANSI C code into TMS320VC5402 code in the bit-exact way through verification using the test vectors. Finally, as the result of implementation, we present the MIPS and memory requirement for the real-time operation.
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KEYWORD
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G.723.1A, Speech Coder, TMS320VC5402
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