VOICE RECOGNITION DEVICE AND LEARNING METHOD AND LEARNING DEVICE TO BE USED IN THE SAME DEVICE AND RECORDING MEDIUM ON WHICH THE SAME METHOD IS PROGRAMMED AND RECORDED

摘要

PROBLEM TO BE SOLVED: To use a bone-conduction microphone for voice recognition by improving the frequency characteristic of the microphone and also to enhance a recognition performance under a noisy environment. SOLUTION: The feature vector of a voice (air-conduction sound) which is gatherer in a second microphone 112 whose sound receiving sensitivity is secured in a frequency band broader than that of a first microphone 101 is estimated by inputting a voice input pattern (bone-condition sound) gathered in the first microphone 101 to an analog-to-digital converter 102 and by selecting and outputting the feature vector while using a first code book 110 and by selecting a correction vector which corresponds to its index and is stored in a second code book 121 and by adding both vectors and by connecting them. Moreover, the estimated voice is used as a voice recognition object and voice parameters stored in a voice dictionary are successively applied to this object as patterns for reference and then both patterns of the voice pattern of the recognition object and the pattern for reference are collated in this device.