US Patent 9852729 Low latency and memory efficient keyword spotting
Patent 9852729 was granted and assigned to Amazon on December, 2017 by the United States Patent and Trademark Office.
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Features are disclosed for spotting keywords in utterance audio data without requiring the entire utterance to first be processed. Likelihoods that a portion of the utterance audio data corresponds to the keyword may be compared to likelihoods that the portion corresponds to background audio (e.g., general speech and/or non-speech sounds). The difference in the likelihoods may be determined, and keyword may be triggered when the difference exceeds a threshold, or shortly thereafter. Traceback information and other data may be stored during the process so that a second speech processing pass may be performed. For efficient management of system memory, traceback information may only be stored for those frames that may encompass a keyword; the traceback information for older frames may be overwritten by traceback information for newer frames.
US Patent 09852729 Low latency and memory efficient keyword spotting US Patent 9852729 Low latency and memory efficient keyword spotting
US Patent 09852729 Low latency and memory efficient keyword spotting
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