| 摘要 |
PROBLEM TO BE SOLVED: To improve the recognition rate of a voice input and to facilitate the input work. SOLUTION: An A/D converting device 2 multiplies an input signal from a microphone 1 by gain to make an A/D conversion and a voice recognition device 3 pattern-matches with a word of a syllable dictionary while dividing the input signal into prescribed units (syllable) when the input signal is voice, to output a suited word code to a CPU 4. At this time, a level measurement part 32 measures the sound pressure level of the prescribed unit to output it to the CPU 4. A level decision part 42 in the CPU 4 decides whether or not the measured level lies, within a prescribed range obtainable a high recognition rate, and when out of the range, the level decision part 42 outputs an input gain control signal to a gain adjustment part 22 to control so that the input voice lies within the prescribed range. |
