This paper is about the application of speech recognition in robot control system. The robot vocal commands are limited in fifty words, such as go origin, up, down, turn right, turn left etc. The means of speech signal processing, include by taking reciprocal spectrum of Linear Predicted Coefficient (LPC) as a eigenvector, the pattern-comparison technique and dynamic time warping (DTW), are used in the speech recognition. In a small acoustic vocabulary recognition application system, the pattern-comparison method based on reciprocal spectrum of LPC is more suitable than the other complex algorithm, especially in the recognition of isolated words. Recognition is realized on a personal computer. The recognized speech is converted to command, sent to the robot control system via the serial port RS232. The voice control system of robot is developed.
