APPARATUS AND METHOD FOR SELECTIVELY ADDING NOISE TO TEMPLATE TO BE USED IN VOICE RECOGNITION SYSTEM

摘要

PURPOSE: To obtain a speech recognition system adapted automatically to a noise environment by providing the device with a first means which applies a signal to indicate a noise signal and a means which is coupled to the first means and forms a template to be modulated according to the predicted noise signal in response with the predicted noise signal. CONSTITUTION: The central position of a switch 13 is a modulation template mode position and the output of a spectrum analyzer 12 enters as estimated value noise statistical module 162. The function of the module 162 is to basically execute a noise analysis or to estimate noise statistics by processing the noise. As a result, the template is formed by selectively adding the noise and the speech recognition is executed. Namely, the recognition is executed by changing over a switch 100 according to whether the template of the state having the noise or the template of the state having the noise of an extremely low level or having no noise. As a result, the use in the state having the noise is possible.