Abstract: It proposes the design of the isolated speech recognition system, based on ARM, and then experiments with it. On the basis of ARM development board provided by Guangzhou Friendly Arm Corporation, in the design ARM Linux-2.6.32.2 has been adopted in the core board and Linux -2.6.32.2 in kernel to meet its hardware requirement. The A/D sampling and output of the voice was realized through the audio decoding system consisting of a UDA1341 chip and its peripheral circuit. MFCC algorithm was used to extract the feathers while HMM algorithm was used to match the patterns. Finally with the help of speech recognition software and speech synthesis software designed by IFLYTEK Corporation, the targeted speech was recognized and the result was put out. This design can find wide application in different systems, such as robot guide systems, intelligent home systems and the sound controlling system in cars.

Key words: ARM（Advanced RISC Machines）； speech recognition； HMM algorithm