Voice detection in audio signals
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United States of America Patent
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Nov 20, 2001
Grant Date -
N/A
app pub date -
Apr 27, 1999
filing date -
Apr 27, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The presence of a voice in an audio signal is detected by sampling frequency components of the audio signal during a window that starts when a power of the audio signal reaches a predetermined threshold and stops when the audio signal's power drops below the predetermined threshold. An array of elements is generated based on the sampled frequency components. Each element in the array corresponds to a time-based sum of frequency components. Whether the audio signal corresponds to a voice is determined using one or values calculated from the generated array. The value may correspond either to a frequency-based sum of array elements or to the window. The calculated values are analyzed using fuzzy logic which generates a measure of a likelihood that the audio signal is a voice.
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