Apparatus and method for echo suppression
AssigneeContinental Automotive Systems, Inc.
InventorsDavid Barron, Suat Yeldener
Life of this patent
Estimating the term…
Abstract
An input signal from the input source is received. An attenuation of an echo canceller filter is calculated using at least the input signal. A spectral component of a frequency band of an echo suppressor is adjusted to perform enhanced suppression using the calculated attenuation. A comfort noise factor is calculated using at least the input signal and the calculated attenuation. The comfort noise to the output of the echo suppressor is adjusted to obtain a modified input signal.
Claims20
A method for providing echo suppression for signals received from an input source, the method comprising:
- receiving an input signal from the input source;
- calculating an attenuation of an echo canceller filter using at least the input signal;
- adjusting a spectral component of a frequency band of an echo suppressor to perform enhanced suppression using the calculated attenuation;
- calculating a comfort noise factor using at least the input signal and the calculated attenuation;
- applying the comfort noise to the output of the echo suppressor to obtain a modified input signal.
An apparatus for providing echo suppression for signals received from an input source, the apparatus comprising:
- an interface having an input and output, the input configured to receive an input signal from the input source;
- a controller coupled to the interface, the controller configured to calculate an attenuation of an echo canceller filter using at least the input signal that is effective to adjust a spectral component of a frequency band of an echo suppressor to perform enhanced suppression using the calculated attenuation, the controller further configured to calculate a comfort noise factor using at least the input signal and the calculated attenuation and to apply the comfort noise to the output of the echo suppressor, the application of the comfort noise being effective to obtain a modified input signal at the output of the echo suppressor.
A system for providing echo suppression for signals received from an input source, the apparatus comprising:
- an echo suppressor;
- a echo suppression adjustment device coupled to the echo suppressor, the echo suppression device comprising:
- an interface having an input and output, the input configured to receive a microphone signal;
- a controller coupled to the interface, the controller configured to calculate an attenuation of an echo canceller filter using at least the microphone signal and adjust a spectral component of a frequency band of the echo suppressor to perform enhanced suppression using the calculated attenuation, the controller further configured to calculate a comfort noise factor using at least the microphone signal and the calculated attenuation, the controller further configured to add the comfort noise to the output of the echo suppressor to obtain a modified microphone signal at the output of the echo suppressor.
Dependencies are inferred from the claim text.