Method For Detecting Target Sound, Method For Detecting Delay Time In Signal Input, And Sound Signal Processor
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United States of America Patent
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Issued Date -
May 22, 2008
app pub date -
Mar 17, 2004
filing date -
Mar 17, 2003
priority date (Note) -
Abandoned
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Abstract
A sound signal processor includes first and second framing sections, first and second frequency analyzing sections, and a cross-spectrum calculating sections, for detecting the phase of a cross-spectrum between the sound signals input to first and second microphones, a phase extracting sections, a phase unwrap processing sections, a frequency band dividing section, and first through N-th inclination calculating sections, for detecting the inclinations of the phase of the cross-spectrum detected by the cross-spectrum calculating section with respect to the frequency, and a histogram calculating section and a voiced/voiceless determining section, for detecting a speech section in the sound received by the first and second microphones based on the inclination with respect to the frequency detected by the first through N-th inclination calculating sections.
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