Adaptive signal equalization
First Claim
1. A method for audio processing in a communication device, comprising:
- based on the characteristics of a first acoustic signal, the first acoustic signal representing at least one captured sound and having a signal-to-noise ratio,automatically determining an adjusted signal-to-noise ratio;
suppressing, using at least one hardware processor, a noise component of a second acoustic signal, the second acoustic signal representing at least one captured sound; and
performing equalization on the noise-suppressed second acoustic signal based on the adjusted signal-to-noise ratio of the first acoustic signal.
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Accused Products
Abstract
The present technology substantially reduces undesirable effects of multi-level noise suppression processing by applying an adaptive signal equalization. A noise suppression system may apply different levels of noise suppression based on the (user-perceived) signal-to-noise-ratio (SNR) or based on an estimated echo return loss (ERL). The resulting high-frequency data attenuation may be counteracted by adapting the signal equalization. The present technology may be applied in both transmit and receive paths of communication devices. Intelligibility may particularly be improved under varying noise conditions, e.g., when a mobile device user is moving in and out of noisy environments.
370 Citations
18 Claims
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1. A method for audio processing in a communication device, comprising:
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based on the characteristics of a first acoustic signal, the first acoustic signal representing at least one captured sound and having a signal-to-noise ratio, automatically determining an adjusted signal-to-noise ratio; suppressing, using at least one hardware processor, a noise component of a second acoustic signal, the second acoustic signal representing at least one captured sound; and performing equalization on the noise-suppressed second acoustic signal based on the adjusted signal-to-noise ratio of the first acoustic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for audio processing in a communication device, comprising:
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suppressing a noise component of a first signal, wherein the first signal is selected from a group consisting of a near-end acoustic signal and a far-end signal; automatically determining, based on characteristics of the first signal, one of an estimated amount of echo return loss and an adjusted signal-to-noise ratio of the first signal; and performing equalization on the noise-suppressed first signal based on the one of the estimated amount of echo return loss and the adjusted signal-to-noise ratio of the first signal. - View Dependent Claims (10)
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11. A system for audio processing in a communication device, comprising:
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a first executable module that determines, using at least one hardware processor, an adjusted signal-to-noise ratio of a first acoustic signal based on characteristics of the first acoustic signal, the first acoustic signal representing at least one captured sound; a second executable module that suppresses a noise component in a second acoustic signal, the second acoustic signal representing at least one captured sound; and an equalizer that equalizes the noise-suppressed second acoustic signal based on the adjusted signal-to-noise-ratio of the first acoustic signal. - View Dependent Claims (12, 13, 14)
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15. A non-transitory computer readable storage medium having embodied thereon a program, the program being executable by a processor to perform a method for audio processing in a communication device, the method comprising:
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based on the characteristics of a first acoustic signal, the first acoustic signal representing at least one captured sound and having a signal-to-noise ratio, automatically determining an adjusted signal-to-noise ratio; suppressing, using at least one hardware processor, a noise component of a second acoustic signal, the second acoustic signal representing at least one captured sound; and performing equalization on the noise-suppressed second acoustic signal based on the adjusted signal-to-noise ratio of the first acoustic signal. - View Dependent Claims (16, 17, 18)
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Specification