Systems and methods of frequency response correction for consumer electronic devices
First Claim
1. A method of correcting frequency response of an electronic device, the method comprising:
- capturing an audio signal output by an electronic device, the capturing comprising converting the audio signal into a plurality of sound intensity values;
capturing an ambient noise signal;
smoothing the captured audio signal to attenuate one or more signal distortions, the smoothing comprising;
dividing the captured audio signal into a plurality of blocks;
determining a plurality of mean audio signal intensities corresponding to the plurality of blocks; and
adjusting the audio signal to produce a smoothed captured audio signal based on the determined plurality of mean audio signal intensities, said adjusting comprising subtracting each of the mean audio signal intensities from sample values of a corresponding one of the plurality of blocks;
smoothing the ambient noise signal to produce a smoothed noise signal;
subtracting the smoothed noise signal from the smoothed captured audio signal to produce a corrected smoothed signal;
clipping the corrected smoothed signal to produce a clipped smoothed signal;
determining, based at least in part on the clipped smoothed signal, one or more frequency response correction parameters, the one or more frequency response correction parameters comprising finite impulse response filter parameters; and
electronically transmitting the one or more frequency response correction parameters to the electronic device, thereby enabling the electronic device to apply the one or more frequency response correction parameters to a subsequent audio signal,wherein at least said smoothing is performed by one or more processors.
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Accused Products
Abstract
Frequency response correction systems and methods for consumer electronic (CE) devices are disclosed. Applying one or more of disclosed techniques can improve a consumer'"'"'s listening experience. The frequency response of a CE device can be corrected to remove or attenuate salient, undesirable features of with minimal user interaction. Audio quality can be tuned for optimal or near optimal performance even at maximum or near maximum volume levels substantially without fluctuations, clipping, or any other distortions. In some embodiments, audio response of the CE device can be captured, smoothed, and corrected. Correction parameters can be stored on the CE device.
19 Citations
24 Claims
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1. A method of correcting frequency response of an electronic device, the method comprising:
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capturing an audio signal output by an electronic device, the capturing comprising converting the audio signal into a plurality of sound intensity values; capturing an ambient noise signal; smoothing the captured audio signal to attenuate one or more signal distortions, the smoothing comprising; dividing the captured audio signal into a plurality of blocks; determining a plurality of mean audio signal intensities corresponding to the plurality of blocks; and adjusting the audio signal to produce a smoothed captured audio signal based on the determined plurality of mean audio signal intensities, said adjusting comprising subtracting each of the mean audio signal intensities from sample values of a corresponding one of the plurality of blocks; smoothing the ambient noise signal to produce a smoothed noise signal; subtracting the smoothed noise signal from the smoothed captured audio signal to produce a corrected smoothed signal; clipping the corrected smoothed signal to produce a clipped smoothed signal; determining, based at least in part on the clipped smoothed signal, one or more frequency response correction parameters, the one or more frequency response correction parameters comprising finite impulse response filter parameters; and electronically transmitting the one or more frequency response correction parameters to the electronic device, thereby enabling the electronic device to apply the one or more frequency response correction parameters to a subsequent audio signal, wherein at least said smoothing is performed by one or more processors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for correcting frequency response of an electronic device, the apparatus comprising:
a correction determination module comprising one or more processors, the correction determination module configured to; convert an audio signal into a plurality of sound intensity values; smooth the audio signal to attenuate one or more signal distortions to produce a smoothed audio signal by at least;
dividing the audio signal into a plurality of blocks, determining a plurality of mean audio signal intensities corresponding to the plurality of blocks, and adjusting the audio signal to produce a smoothed captured audio signal based on the determined plurality of mean audio signal intensities;smooth an ambient noise signal to produce a smoothed noise signal; subtract the smoothed noise signal from the smoothed captured audio signal to produce a corrected smoothed signal; receive correction input from a user, the correction input comprising one or more parameters for a magnitude correction of at least a portion of the frequency response of the smoothed audio signal; calculate, based at least in part on the corrected smoothed signal and the correction input, one or more frequency response correction parameters; and provide the one or more frequency response correction parameters to the electronic device. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
Specification