Adaptive environmental context sample and update for comparing speech recognition
First Claim
1. A method for operating a sound recognition sensor, the method comprising:
- receiving an analog signal that may contain a signature sound;
extracting sparse sound parameter information from the analog signal;
sampling the extracted sparse sound parameter information in a periodic manner and updating an environmental context value to indicate a current environmental condition; and
comparing the sparse sound parameter information to both the environmental context value and a signature sound parameter database stored locally with the sound recognition sensor to identify sounds or speech contained in the analog signal, such that identification of sound or speech is adaptive to the current environmental condition.
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Abstract
A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. Sparse sound parameter information is extracted from the analog signal. The extracted sound parameter information is sampled in a periodic manner and a context value is updated to indicate a current environmental condition. The sparse sound parameter information is compared to both the context value and a signature sound parameter database stored locally with the sound recognition sensor to identify sounds or speech contained in the analog signal, such that identification of sound or speech is adaptive to the current environmental condition.
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Citations
12 Claims
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1. A method for operating a sound recognition sensor, the method comprising:
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receiving an analog signal that may contain a signature sound; extracting sparse sound parameter information from the analog signal; sampling the extracted sparse sound parameter information in a periodic manner and updating an environmental context value to indicate a current environmental condition; and comparing the sparse sound parameter information to both the environmental context value and a signature sound parameter database stored locally with the sound recognition sensor to identify sounds or speech contained in the analog signal, such that identification of sound or speech is adaptive to the current environmental condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for recognizing a sound, the apparatus comprising:
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a microphone; an analog front end section comprising analog feature extraction circuitry configured to receive an analog signal from the microphone that may contain a signature sound and to extract sparse sound parameter information from the analog signal; a digital classification section coupled to the analog front end section; an environmental context value storage coupled to the digital classification section, wherein the digital classification section is operable to sample the extracted sparse sound parameter information in a periodic manner and to update the environmental context value storage to indicate a current environmental condition; and wherein the digital classification is configured to compare the sparse sound parameter information to both the environmental context value and a signature sound parameter database stored locally with the digital classification section to identify sounds or speech contained in the analog signal, such that identification of sound or speech is adaptive to the current environmental condition. - View Dependent Claims (9, 10, 11, 12)
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Specification