Low power activation of a voice activated device
First Claim
1. A voice activated device, comprising:
- a voice trigger circuit,an automatic speech recognition circuit;
a controller;
a set of detectors;
wherein the voice trigger circuit is arranged to receive first detection signals from a first sensor of the set of detectors and to trigger an activation of the automatic speech recognition circuit in response to a detection of a voice trigger, while the automatic speech recognition device is in a first power mode;
wherein the automatic speech recognition circuit is arranged to detect, while operating in a second power mode, an audio activation command;
wherein a power consumption of the automatic speech recognition circuit when operating in the second power mode exceeds a power consumption of the automatic speech recognition when operating in the first power mode;
wherein the first sensor is a bone conduction sensor or a vibration sensor; and
wherein the controller is arranged to determine which sub-set of detectors to activate when the automatic speech recognition device is in the first power mode, in response to previous voice trigger detections and automatic speech recognition detections;
wherein the sub-set of detectors belongs to the set of detectors.
1 Assignment
0 Petitions
Accused Products
Abstract
In a mobile device, a bone conduction or vibration sensor is used to detect the user'"'"'s speech and the resulting output is used as the source for a low power Voice Trigger (VT) circuit that can activate the Automatic Speech Recognition (ASR) of the host device. This invention is applicable to mobile devices such as wearable computers with head mounted displays, mobile phones and wireless headsets and headphones which use speech recognition for the entering of input commands and control. The speech sensor can be a bone conduction microphone used to detect sound vibrations in the skull, or a vibration sensor, used to detect sound pressure vibrations from the user'"'"'s speech. This VT circuit can be independent of any audio components of the host device and can therefore be designed to consume ultra-low power. Hence, this VT circuit can be active when the host device is in a sleeping state and can be used to wake the host device on detection of speech from the user. This VT circuit will be resistant to outside noise and react solely to the user'"'"'s voice.
-
Citations
15 Claims
-
1. A voice activated device, comprising:
-
a voice trigger circuit, an automatic speech recognition circuit; a controller; a set of detectors; wherein the voice trigger circuit is arranged to receive first detection signals from a first sensor of the set of detectors and to trigger an activation of the automatic speech recognition circuit in response to a detection of a voice trigger, while the automatic speech recognition device is in a first power mode; wherein the automatic speech recognition circuit is arranged to detect, while operating in a second power mode, an audio activation command; wherein a power consumption of the automatic speech recognition circuit when operating in the second power mode exceeds a power consumption of the automatic speech recognition when operating in the first power mode; wherein the first sensor is a bone conduction sensor or a vibration sensor; and wherein the controller is arranged to determine which sub-set of detectors to activate when the automatic speech recognition device is in the first power mode, in response to previous voice trigger detections and automatic speech recognition detections;
wherein the sub-set of detectors belongs to the set of detectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method for activating a voice activated device, the method comprises:
-
determining which sub-set of detectors to activate when an automatic speech recognition process is deactivated in response to previous voice trigger detections and automatic speech recognition detections;
wherein the sub-set of detectors belongs to a set of detectors;generating, by a first sensor of the set of detectors, first detection signals;
wherein the first sensor is a bone conduction sensor or a vibration sensor;detecting a voice trigger in response to the first detection signals; triggering the automatic speech recognition process in response to the detecting of the voice trigger; and detecting, by the automatic speech recognition process, an audio activation command; and deactivating the speech recognition process; wherein power consumption associated with the automatic speech recognition process exceeds a power consumption associated with the detecting of the voice trigger. - View Dependent Claims (14, 15)
-
Specification