Digital filtering method, digital filter device, readable recording medium in the digital filter program and computer

摘要

I detect a vowel and consonant parts parts only [problem] integer arithmetic. [MEANS FOR SOLVING PROBLEMS] An amplitude calculation unit 22 determines the amplitude of the input audio signal, quantizing the amplitude, extracts the digital filter device, the amplitude calculator a feature from the voice signal for speech recognition is performed based on the sound signal input each data of each point which has been quantized at 22, the division value calculation for obtaining the division value centered on the data by dividing the number of data to be added to the amplitude value of the data in a predetermined range adjacent, by adding this a unit 24, a comparison unit 26 for each data, and compares the division value calculated by the quotient calculation unit 24, and an amplitude value calculated by the amplitude calculation unit 22, and outputs the authenticity of the comparison result, compare and a conversion unit 28 on the basis of the output of the unit, converts uneven waveform amplitude waveform. This enables the extraction of the feature is made possible in comparison operations with integer addition, to perform high-speed, low cost can be extremely simplified calculation process. [Selection Figure] Figure 25