Method and system for laughter detection
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United States of America Patent
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Oct 29, 2013
Grant Date -
Aug 14, 2008
app pub date -
Feb 11, 2007
filing date -
Feb 11, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for laughter detection. Laughter is detected through the presence of a sequence of at least a predetermined number such as three consecutive bursts, each burst comprising a voiced portion and an unvoiced portion. After detecting bursts, n-tuples such as triplets are detected, and a likelihood of each burst N-tuple to represent laughter is provided by comparison to predetermined thresholds. Finally, a total score is assigned to the signal based on the grades associated with the triplets and parameters such as the distance between the N-tuples, the total score representing the probability that the audio signal comprises a laughter episode. The method and apparatus preferably comprise a training step and module for determining the thresholds according to manually marked audio signals.
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