Low power voice trigger for acoustic apparatus and method
First Claim
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1. A method comprising:
- receiving an analog signal from an acoustic transducer;
converting the analog signal into digital data;
determining whether acoustic activity exists within the digital data;
in response to determining acoustic activity exists, storing the digital data in a temporary memory storage device and maintaining a count of an amount of digital data in the temporary memory storage device;
in response to the count exceeding a threshold, sending a processor wake-up signal and transmitting at least some of the digital data from the temporary memory storage device.
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Abstract
An analog signal is received from an acoustic transducer. The analog signal is converted into digital data. A determination is made as to whether acoustic activity exists within the digital data. The digital data is stored in a temporary memory storage device and a count is maintained of an amount of digital data in the temporary memory storage device. When the count exceeds a predetermined threshold, at least some of the digital data is transmitted from the temporary memory storage device to a processor.
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Citations
18 Claims
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1. A method comprising:
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receiving an analog signal from an acoustic transducer; converting the analog signal into digital data; determining whether acoustic activity exists within the digital data; in response to determining acoustic activity exists, storing the digital data in a temporary memory storage device and maintaining a count of an amount of digital data in the temporary memory storage device; in response to the count exceeding a threshold, sending a processor wake-up signal and transmitting at least some of the digital data from the temporary memory storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A microphone apparatus comprising:
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an acoustic transducer configured to convert acoustic energy into an analog signal; a converter coupled to the acoustic transducer and configured to convert the analog signal into digital data; an acoustic activity detection (AAD) module coupled to the converter and configured to determine whether acoustic activity exists within the digital data; a buffer coupled to the converter and configured to store the digital data while the AAD determines whether acoustic activity exists within the digital data; a temporary memory storage device; a controller configured to; cause the digital data stored in the buffer to be stored in the temporary memory storage device upon determining that acoustic activity exists within the digital data, maintain a count of an amount of digital data stored in the temporary memory storage device, and send a processor wake-up signal and transmit at least some of the digital data from the temporary memory storage device when the count exceeds a threshold. - View Dependent Claims (10, 11, 12, 13)
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14. A method of operating an acoustic device, comprising:
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sensing sound energy and converting the sound energy into data; in response to acoustic activity being detected in the data, storing the data in a temporary memory storage device; in response to the amount of data stored in the temporary memory storage device exceeding a threshold, waking up a digital signal processor and transmitting at least some of the data in a burst from the temporary memory storage device to the digital signal processor; and at the digital signal processor, determining whether a keyword is present in the data. - View Dependent Claims (15, 16, 17, 18)
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Specification