Detecting emotions using voice signal analysis
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United States of America Patent
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Dec 1, 2009
Grant Date -
Jul 12, 2007
app pub date -
Mar 8, 2007
filing date -
Aug 31, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system and method are provided for detecting emotional states using statistics. First, a speech signal is received. At least one acoustic parameter is extracted from the speech signal. Then statistics or features from samples of the voice are calculated from extracted speech parameters. The features serve as inputs to a classifier, which can be a computer program, a device or both. The classifier assigns at least one emotional state from a finite number of possible emotional states to the speech signal. The classifier also estimates the confidence of its decision. Features that are calculated may include a maximum value of a fundamental frequency, a standard deviation of the fundamental frequency, a range of the fundamental frequency, a mean of the fundamental frequency, and a variety of other statistics.
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