Single-chip speech recognition system based on 8051 microcontroller core

Author

Yuanyuan, Shi ; Jia, Liu ; Runsheng, Liu

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

Volume

47

Issue

1

fYear

2001

fDate

2/1/2001 12:00:00 AM

Firstpage

149

Lastpage

153

Abstract

This paper describes a single-chip speech recognition system. It contains the speech functions of prompt, playback, speaker-dependent speech recognition, suitable for the voice activated systems in toys, games, consumer electronics, office devices, etc. The chip is designed based on the SOC (system on chip) philosophy and an 8-bit MCU, RAM, ROM, ADC/DAC, PWM, I/O ports and other peripheral circuits are all embedded in it. Software modules including control/communication, speech coding and speech recognition algorithms are implemented in an 8051 compatible microcontroller core, resulting in the extremely low cost of the chip. The speech recognition adopts the template matching technique. It recognizes up to 20 phrases with an average length of 1 second and the recognition accuracy reaches more than 95% with the background SNR above 10 dB. Speech coding uses continuous variable slope delta modulation (CVSD) algorithm. The bit rate is 16 kbits/s

Keywords

analogue-digital conversion; consumer electronics; delta modulation; digital-analogue conversion; microcontrollers; pulse width modulation; random-access storage; read-only storage; speech coding; speech recognition; 16 kbit/s; 8 bit; 8051 microcontroller core; ADC/DAC; CVSD algorithm; I/O ports; MCU; PWM; RAM; ROM; background SNR; consumer electronics; continuous variable slope delta modulation; games; office devices; peripheral circuits; playback; prompt; recognition accuracy; single-chip speech recognition system; software modules; speaker-dependent speech recognition; speech coding; speech functions; speech recognition algorithms; template matching; toys; voice activated systems; Circuits; Communication system control; Consumer electronics; Games; Microcontrollers; Pulse width modulation; Read only memory; Speech coding; Speech recognition; System-on-a-chip;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.920433

Filename

920433