LOW-POWER VOICE COMMAND DETECTOR

摘要

A low-power voice command detection method uses an audio monitoring device to capture sound. The captured sound is analyzed in steps to determine if it fulfills a number of criteria regarding sound level, voice content and identifiable voice commands. For each step the processing is more complex and power demanding. A threshold between the first and subsequent steps is used to gate further processing. This threshold is dynamically adjusted, based on the outcome of the analysis, to avoid unnecessary processing and increase system performance.

主权项

1. An electronic device, comprising:
audio circuitry for capturing ambient sound; voice command detection circuitry for determining voice commands provided by a user, the voice command detection circuitry configured to disregard sound captured by the audio circuitry that does not exceed a first sound threshold level, analyze sound captured by the audio module that exceeds the first sound threshold level for the presence of speech or ambient noise, and dynamically adjust the first sound threshold level based on the analysis of the captured sound.