Speech section detection apparatus
First Claim
1. A speech section detection apparatus comprising:
- preprocessing means for removing noise contained in a speech signal;
speech pitch extracting means for extracting a speech pitch signal from the speech signal from which noise has been removed by the preprocessing means;
gate signal generating means for generating a gate signal based on the speech pitch extracted by the speech pitch extracting means; and
speech section signal generating means for generating a speech section signal based on the gate signal generated by the gate signal generating means.
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Abstract
A speech section detection apparatus capable of reliably detecting a speech section even for a word containing a glottal stop sound or for a word containing a succession of “s” column sounds or “h” column sounds (sounds in the third column or the sixth column in the Japanese Goju-on Zu syllabary table). A speech signal detected by a microphone is amplified by a line amplifier, and converted by an analog/digital converter into a digital signal which is then stored in a memory. The stored speech signal is fetched into a pitch detector where a speech pitch is extracted by processing the speech signal in time domain. A gate signal generator controls the gate signal based on the speech pitch, and a speech section signal generator controls a speech section signal based on the gate signal. A word can be extracted by segmenting the speech signal stored in the memory in accordance with the speech section signal.
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13 Claims
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1. A speech section detection apparatus comprising:
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preprocessing means for removing noise contained in a speech signal;
speech pitch extracting means for extracting a speech pitch signal from the speech signal from which noise has been removed by the preprocessing means;
gate signal generating means for generating a gate signal based on the speech pitch extracted by the speech pitch extracting means; and
speech section signal generating means for generating a speech section signal based on the gate signal generated by the gate signal generating means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification