Systems and methods for adaptive signal equalization
AssigneeAudience, Inc.
InventorsSangnam Choi, Chad Seguin
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Abstract
The present technology minimizes undesirable effects of multi-level noise suppression processing by applying an adaptive equalization. A noise suppression system may apply different levels of noise suppression based on the (user-perceived) signal-to-noise-ratio (SNR). 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 cell phone user is moving in and out of noisy environments.
Claims24
A method for audio processing in a communication device, comprising:
- receiving a first signal including a noise component and having a signal-to-noise ratio;
- automatically determining an adjusted signal-to-noise ratio based on characteristics of the first signal;
- suppressing, using a processor executing instructions stored in memory, a noise component of a second signal;
- and
- performing equalization on the noise-suppressed second signal based on the adjusted signal-to-noise ratio of the first signal.
A method for audio processing in a communication device, comprising:
- estimating, using a processor executing instructions stored in memory, an amount of echo return loss based on a far-end signal in the communication device;
- 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 the far-end signal;
- and
- performing equalization on the noise-suppressed first signal based on the estimated amount of echo return loss.
A system for audio processing in a communication device, comprising:
- a microphone that receives a near-end acoustic signal, the near-end acoustic signal including a noise component and having a signal-to-noise ratio;
- a receiver that receives a far-end signal, the far-end signal including a noise component and having a signal-to-noise ratio;
- a first executable module that determines an adjusted signal-to-noise ratio of a first signal based on characteristics of the first signal;
- a second executable module that suppresses a noise component in a second signal;
- and
- an equalizer that equalizes the noise-suppressed second signal based on the adjusted signal-to-noise-ratio of the first signal.
A system for audio processing in a communication device, comprising:
- a first executable module that estimates an amount of echo return loss based on a far-end signal in the communication device;
- a second executable module that suppresses a noise component in a first signal, wherein the first signal is selected from a group consisting of a near-end acoustic signal and the far-end signal;
- and
- a processor to equalize the noise-suppressed first signal based on the estimated amount of echo return loss.
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:
- receiving a first signal including a noise component and having a signal-to-noise ratio;
- automatically determining an adjusted signal-to-noise ratio based on characteristics of the first signal;
- suppressing a noise component of a second signal;
- and
- performing equalization on the noise-suppressed second signal based on the adjusted signal-to-noise ratio of the first signal.
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:
- estimating an amount of echo return loss based on a far-end signal in the communication device;
- 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 the far-end signal;
- and
- performing equalization on the noise-suppressed first signal based on the estimated amount of echo return loss.
Dependencies are inferred from the claim text.