| 摘要 |
PURPOSE:To detect the presence of a voice at a high detection rate even when the amplitude of a noise is large by analyzing the frequency of an input signal by a preprocessing part, inputting the analysis result to a neural network, and deciding whether or not the input signal contains a voiced sound from the output of the neural network. CONSTITUTION:The preprocessing part 10 analyzes the frequency of the input signal which is inputted from a signal input part, the analysis result of the preprocessing part 10 is inputted to the nueral network 20, and a decision circuit 30 decides whether or not the input signal contains the voiced sound from the output of the neural network 20. Consequently, even when the amplitude of the noise is large and an influence upon the detection of a voice is large, the presence of the voice in noisy environment can be detected at a high detection rate and short-time processing is easily performed. |
