Realization of speech processing and recognition system based on digital signal processor

Abstract

16-bit fixed-point high-speed chip TMS320VC5402 and audio interface chip TLV320AIC10 are adopted in this paper, by which collecting, filtering and compressing data are processed. Final data are put into computer through serial port and received by MATLAB to complete playback, coding, recognition and simulation. Floating-point operation is realized on fixed-point digital signal processor, which has higher precision in calculation and wider signal processing dynamic range comparing with fixed-point realization. The experimental results show that rate of continuous word speech recognition is more than 92%. The new system has advantage of small size, low cost and high scalability, which can be applied to many specific occasions, such as the speech controlling toys and access control system.