Audible alarm signal detectors
AssigneeThe ADT Security Corporation
InventorMichael A. Arnao
Life of this patent
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Abstract
A device is provided. The device includes processing circuitry configured to detect an audio signal associated with an alarm event, generate a spectrogram using a plurality of input samples of the audio signal where the spectrogram includes a plurality of spectral bins, select one of the plurality of spectral bins associated with a predefined frequency range, perform edge detection on the selected one of the plurality of spectral bins, perform pattern detection based on the edge detection, determine the audio signal corresponds to an audio alarm signal based on the pattern detection, and trigger an action in response to determining that the audio signal corresponds to an audio alarm signal.
Claims16
A device, comprising:
- processing circuitry configured to:
- detect an audio signal associated with an alarm event;
- generate a spectrogram using a plurality of input samples of the audio signal;
- generate a plurality of spectral bins based on the spectrogram, each spectral bin being a time-magnitude bin corresponding to a respective frequency range over a predefined time period in the spectrogram;
- select one of the plurality of spectral bins associated with a predefined frequency range;
- determine a plurality of pulse-edge characteristics of the selected one of the plurality of spectral bins by at least performing edge detection on the selected one of the plurality of spectral bins;
- perform pattern detection based on the plurality of pulse-edge characteristics of the selected one of the plurality of spectral bins;
- determine the audio signal corresponds to an audio alarm signal based on the pattern detection;
- and
- trigger an action in response to determining that the audio signal corresponds to an audio alarm signal.
A method implemented by a device, the method comprising:
- detecting an audio signal associated with an alarm event;
- generating a spectrogram using a plurality of input samples of the audio signal;
- generating a plurality of spectral bins based on the spectrogram, each spectral bin being a time-magnitude bin corresponding to a respective frequency range over a predefined time period in the spectrogram;
- selecting one of the plurality of spectral bins associated with a predefined frequency range;
- determining a plurality of pulse-edge characteristics of the selected one of the plurality of spectral bins by at least performing edge detection on the selected one of the plurality of spectral bins;
- performing pattern detection based on the plurality of pulse-edge characteristics of the selected one of the plurality of spectral bins;
- determining the audio signal corresponds to an audio alarm signal based on the pattern detection;
- and
- triggering an action in response to determining that the audio signal corresponds to an audio alarm signal.
Dependencies are inferred from the claim text.