US 2014/0236582 A1 · LOW POWER VOICE DETECTION

Abstract

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.

Claims25

Dependent claims

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, and
perform 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.

Dependencies are inferred from the claim text.

Facts

Application

13/997,070Filed 6 Dec 2011

Published

21 Aug 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

G10L 15/20
Speech recognition: speech recognition techniques specially adapted for robustness in adverse environments, e.g. in noise, of stress induced speech
G06F 17/142
Discrete Fourier transforms: fast Fourier transforms, e.g. using a Cooley-Tukey type algorithm
G10L 21/0208
Speech enhancement, e.g. noise reduction or echo cancellation: noise filtering
G10L 25/18
Characterised by the type of extracted parameters: the extracted parameters being spectral information of each sub-band

Low power voice detection

Life of this patent

Low power voice detection

Life of this patent

Abstract

Claims25