LOW POWER AUDIO DETECTION
First Claim
1. A method of detecting a predetermined audio signal in audio signals of a device, the device including a processor, the method comprising the steps of:
- controlling a clock rate provided to the processor, to operate the device in a low power mode having a relatively low power consumption;
detecting, in the low power mode, probable presence of the predetermined audio signal in the audio signals; and
switching the device from the low power mode to a normal power mode responsive to the detected presence of the predetermined audio signal, by adjusting the clock rate provided to the processor, the normal power mode having a relatively high power consumption.
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Accused Products
Abstract
Devices and methods of detecting a predetermined audio signal in audio signals are provided. A device includes a processor coupled to a clock signal generator, a power controller and an audio detector. The power controller controls a clock rate provided to the processor by the clock signal generator, to control the device to operate in a low power mode having a relatively low power consumption or in a normal power mode having a relatively high power consumption. The audio detector receives audio signals and detects, in the low power mode, probable presence of a predetermined audio signal in the audio signals. The power controller controls the device to switch from the low power mode to the normal power mode responsive to the detected presence of the predetermined audio signal by the audio detector.
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Citations
27 Claims
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1. A method of detecting a predetermined audio signal in audio signals of a device, the device including a processor, the method comprising the steps of:
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controlling a clock rate provided to the processor, to operate the device in a low power mode having a relatively low power consumption; detecting, in the low power mode, probable presence of the predetermined audio signal in the audio signals; and switching the device from the low power mode to a normal power mode responsive to the detected presence of the predetermined audio signal, by adjusting the clock rate provided to the processor, the normal power mode having a relatively high power consumption. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device comprising:
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a processor coupled to a clock signal generator; a power controller configured to control a clock rate provided to the processor by the clock signal generator, to control the device to operate in a low power mode having a relatively low power consumption or in a normal power mode having a relatively high power consumption; and an audio detector coupled to the power controller, the audio detector configured to receive audio signals and to detect, in the low power mode, probable presence of a predetermined audio signal in the audio signals, wherein the power controller controls the device to switch from the low power mode to the normal power mode responsive to the detected presence of the predetermined audio signal by the audio detector. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification