LOW POWER VOICE DETECTION

摘要

Methods of enabling voice processing with minimal power consumption includes recording time-domain audio signal at a first clock frequency and a first voltage, and performing Fast Fourier Transform (FFT) operations on the time-domain audio signal at a second clock frequency to generate frequency-domain audio signal. The frequency domain audio signal may be enhanced to obtain better signal to noise ratio, through one or multiple filtering and enhancing techniques. The enhanced audio signal may be used to generate the total signal energy and estimate the background noise energy. Decision logic may determine from the signal energy and the background noise, the presence or absence of the human voice. The first clock frequency may be different from the second clock frequency.

主权项

1. An apparatus comprising:
logic to,
store a time-domain audio signal in a memory configured to operate based on a first clock frequency and a first voltage, andperform Fast Fourier Transform (FFT) operations on the time-domain audio signal based on a second clock frequency and a second voltage to generate a frequency-domain audio signal.