Non-speech section detecting method and non-speech section detecting device

A non-speech section detecting device generating a plurality of frames having a given time length on the basis of sound data obtained by sampling sound, and detecting a non-speech section having a frame not including voice data based on speech uttered by a person, the device comprising:

• a first calculating part configured to calculate, for each frame of the plurality of frames, a value, wherein the value is one of a power of sound data, a pitch of sound data, or a bias of a spectrum obtained by converting sound data into components on a frequency axis;
• a second calculating part configured to calculate, for a pair of consecutive frames, a variation between the calculated values calculated for the frames in the pair and configured to judge whether the calculated variation is smaller than or equal to a given threshold, and performing, for each pair of consecutive frames in the plurality of frames, the calculating of a variation and the judging;
• a counting part configured to count a number of variations judged as smaller than or equal to the threshold;
• a count judging part configured to judge whether the counted number is greater than or equal to a given value;
• and
• a detecting part configured to detect, when the counted number is judged as greater than or equal to the given value, a section of the sound data as a non-speech section.