Aiming at practical demand for speech recognition anti-noise

propose a secondary combination antinoise technology

design an anti-noise embedded speech recognition system

which uses digital signal processor（ DSP） as hardware platform and hidden Markov model（ HMM） as algorithm. The hardware platform of speech recognition system is constructed by TMS320VC5509 A DSP

and the system is matched with peripheral hardware circuit to form speech recognition system. Using discrete hidden Markov model（ DHMM） as recognition algorithm for software design and programming

system software include four modules

which are identification module

training module

learning module and USB module. Experimental results show that speech recognition system based on secondary combination anti-noise technology has better anti-noise effect.