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;
wherein the voice trigger circuit is arranged to receive first detection signals from a first sensor 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; and
wherein the first sensor is a bone conduction sensor or a vibration sensor.
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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.
77 Citations
21 Claims
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1. A voice activated device, comprising:
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a voice trigger circuit, an automatic speech recognition circuit; wherein the voice trigger circuit is arranged to receive first detection signals from a first sensor 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; and wherein the first sensor is a bone conduction sensor or a vibration sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19, 20)
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14. A voice activated device, comprising:
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a first sensor; a signal processor; wherein the signal processor is arranged to; receive first detection signals from the first sensor and to detect a voice trigger when operating in a first power mode; upon a detection of the voice trigger enter a second power mode and detect, by applying automatic speech recognition, an audio activation command; wherein a power consumption of the signal processor when operating in the second power mode exceeds a power consumption of the signal processor when operating in the first power mode; and wherein the first sensor is a bone conduction sensor or a vibration sensor.
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15. A method for activating a voice activated device, the method comprises:
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generating by a first sensor 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 an 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 (16, 17, 18)
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21. A kit, comprising a voice trigger circuit and an automatic speech recognition circuit;
- wherein the voice trigger circuit is arranged to receive first detection signals from a first sensor 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; and
wherein the first sensor is a bone conduction sensor or a vibration sensor.
- wherein the voice trigger circuit is arranged to receive first detection signals from a first sensor 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;
Specification