A VOICE RECOGNITION SYSTEM

In a voice recognition system which can immediately recognize and analyze a voice input by an operator, the system includes: a microphone for converting a voice to an electrical voice signal having a voice sound portion and a non-voice portion; an acoustic processing unit for detecting a power and spectrum of the electrical voice signal in accordance with a predetermined sampling time interval, and outputting a power time-series data and a spectrum time-series data at the predetermined sampling time interval to produce a feature time-series data; voice section detection unit for receiving the power time-series data from the acoustic processing unit, detecting a start point and an end point of the voice sound portion, and outputting an end decision signal when the end of the voice sound portion is decided; a word dictionary for storing word labels, word numbers corresponding to the word labels, and word templates constituted by the feature time-series data corresponding to the word labels, the word labels being ordered in accordance with frequency of use of the word; a verification unit for receiving the feature time-series data of the voice to be verified, verifying the feature time-series data with the word template stored in the word dictionary, and calculating a degree of similarity between the voice and the word template; sorting unit for sorting data calculated in the verification unit in accordance with the degree of similarity, the data being sorted in order of the higher degree of similarity; selection unit for selecting one or more words having higher degree of similarity from words sorted in the sorting unit, and outputting these words to a display unit; a word frequency dictionary for storing word labels, word numbers corresponding to each word label, word templates constituted by the feature time-series data corresponding to each word label, and frequency data attached to each word label; and word dictionary sorting unit provided between the word dictionary and the word frequency dictionary, and for sorting the word label of the word frequency dictionary in accordance with order of higher frequency degree, and outputting sorted words to the word dictionary.