at last compared two hardware realizing project : embedded project and dsp project . base the need of this system, i choose the dsp project . the dsp project adopted tms320vc5409-80 as main chip, match with ad converter tlc2558, power chip tps73hd318, to be the whole hardware circuit . at the same time realized the interface between speech recognition system and safety testing equipment . because there was some differences between voltage of dsp system and mega128 system, so i discussed how to convert voltage and get the speech recognition sub-system which can suited for original system . because the system get limit speech samples, and in order to ensure the stability of the system, so i add speech identification chip rsc364 as a sub system to ensure the stability of the system 同時實現(xiàn)該語音識別系統(tǒng)與原電器安全性測試系統(tǒng)接口,由于dsp系統(tǒng)與mega128系統(tǒng)存在電平轉換的問題,就又將電平轉換的方法進行了討論,得到與原系統(tǒng)匹配的語音識別系統(tǒng),由于本系統(tǒng)的識別算法獲得的語音樣本有限,為了確保本語音識別系統(tǒng)的穩(wěn)定可靠,在語音識別系統(tǒng)中最后加入語音識別專用芯片rsc364作為輔助的語音識別子系統(tǒng)來保證系統(tǒng)的可靠性。