Acoustic signal classification system
12 Assignments
0 Petitions
Accused Products
Abstract
A system classifies the source of an input signal. The system determines whether a sound source belongs to classes that may include human speech, musical instruments, machine noise, or other classes of sound sources. The system is robust, performing classification despite variation in sound level and noise masking. Additionally, the system consumes relatively few computational resources and adapts over time to provide consistently accurate classification.
126 Citations
24 Claims
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1. (canceled)
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2. A method for classifying an input signal, comprising:
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obtaining an input signal;
determining a time-frequency representation of the input signal;
detecting a harmonic present in the time-frequency representation; and
initiating spectrogram template matching in response to detecting the harmonic. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. An acoustic signal classification system comprising:
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a processor;
memory coupled to the processor, the memory comprising instructions operable to cause the processor to;
obtain an input signal;
determine a time-frequency representation of the input signal;
detect a harmonic present in the time-frequency representation; and
initiate spectrogram template matching in response to detecting the harmonic. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A product comprising:
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a machine readable medium; and
instructions stored on the machine readable medium that cause a processor in a signal processing system to;
obtain an input signal;
determine a time-frequency representation of the input signal;
detect a harmonic present in the time-frequency representation; and
initiate spectrogram template matching in response to detecting the harmonic. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification