Adaptive power saving for an audio device
First Claim
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1. A method for adaptive power control, comprising:
- monitoring noise level within a primary acoustic signal;
comparing the noise level to a threshold;
in response to the noise level being lower than the threshold;
deactivating a noise suppression system;
bypass filtering the primary acoustic signal, the bypass filtering substantially matching at least one of a magnitude and a phase response of a filter to produce a filtered primary acoustic signal; and
cross fading the filtered primary acoustic signal with an output of the noise suppression system such that the filtered primary acoustic signal is faded in and the output of the noise suppression system is faded out; and
activating the noise suppression system in response to the noise level being higher than the threshold.
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Abstract
An adaptive power control monitors the noise level within a primary acoustic signal and compares the noise level to a threshold. If the noise level is lower than the threshold, a noise suppression system is deactivated and bypass filtering and cross fading are enabled. If the noise level is higher than the threshold, the noise suppression system is activated.
59 Citations
23 Claims
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1. A method for adaptive power control, comprising:
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monitoring noise level within a primary acoustic signal; comparing the noise level to a threshold; in response to the noise level being lower than the threshold; deactivating a noise suppression system; bypass filtering the primary acoustic signal, the bypass filtering substantially matching at least one of a magnitude and a phase response of a filter to produce a filtered primary acoustic signal; and cross fading the filtered primary acoustic signal with an output of the noise suppression system such that the filtered primary acoustic signal is faded in and the output of the noise suppression system is faded out; and activating the noise suppression system in response to the noise level being higher than the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A non-transitory computer readable storage medium having embodied thereon a program, the program executable by a processor to perform a method for adaptive power control, the method comprising:
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monitoring noise level within a primary acoustic signal; comparing the noise level to a threshold; in response to the noise level being lower than the threshold; deactivating a noise suppression system; bypass filtering the primary acoustic signal, the bypass filtering substantially matching at least one of a magnitude and a phase response of a filter to produce a filtered primary acoustic signal; and cross fading the filtered primary acoustic signal with an output of the noise suppression system such that the filtered primary acoustic signal is faded in and the output of the noise suppression system is faded out; and activating the noise suppression system in response to the noise level being higher than the threshold. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for adaptive power control, the system comprising:
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a primary microphone configured to receive an acoustic signal; a noise suppression module configured to be executed by a processor to receive a noise estimate, the noise estimate being based on the acoustic signal, and process the acoustic signal based on the noise estimate; and a power management module configured to be executed by a processor to; in response to the noise estimate being lower than a threshold; deactivate the noise suppression module by the processor; bypass filter the primary acoustic signal by the processor, the bypass filter substantially matching at least one of a magnitude and a phase response of a filter to produce a filtered primary acoustic signal; and cross fade the filtered primary acoustic signal with an output of the noise suppression module by the processor such that the filtered primary acoustic signal is faded in and the output of the noise suppression module is faded out; and activate the noise suppression module by the processor in response to the noise estimate being higher than the threshold. - View Dependent Claims (23)
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Specification