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In order to simplify the complexity of the algorithm structure of G.729 protocol and make the speech transmitted real-time on the ARM 9 platform, the present paper analyzes the G.729 protocol and designs the hard and software of the ARM 9 platform. Optimization and upgrading of Language C and algorithm based on the ARM 9 platform are conducted. The result of the research shows that the optimized complexity of the algorithm structure of G.729 protocol is obviously reduced and the requirements of real-time transmissions are met. KeywordsARM9; G.729; speech coding; optimization

Optimization and Realization of G.729 Protocol Based on ARM 9 Platform