Analog voice activity detection
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United States of America
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Jan 14, 2020
Grant Date -
Jan 10, 2019
app pub date -
Aug 27, 2018
filing date -
Aug 27, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
According to some embodiments, an analog processing portion may receive an audio signal from a microphone. The analog processing portion may then convert the audio signal into sub-band signals and estimate an energy statistic value, such as a Signal-to-Noise Ratio (“SNR”) value, for each sub-band signal. A classification element may classify the estimated energy statistic values with analog processing such that a wakeup signal is generated when voice activity is detected. The wakeup signal may be associated with, for example, a battery-powered, always-listening audio application.
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