SINGLE-CHANNEL SUPPRESSION OF INTEFERING SOURCES

摘要

Techniques described herein are directed to performing back-end single-channel suppression of one or more types of interfering sources (e.g., additive noise) in an uplink path of a communication device. The back-end single-channel suppression techniques may suppress types(s) of additive noise using one or more suppression branches (e.g., a non-spatial (or stationary noise) branch, a spatial (or non-stationary noise) branch, a residual echo suppression branch, etc.). The non-spatial branch may be configured to suppress stationary noise from the single-channel audio signal, the spatial branch may be configured to suppress non-stationary noise from the single-channel audio signal and the residual echo suppression branch may be configured to suppress residual echo from the signal-channel audio signal. The spatial branch may be disabled based on an operational mode (e.g., single-user speakerphone mode or a conference speakerphone mode) of the communication device or based on a determination that spatial information is ambiguous.

主权项

1. A method, comprising:
receiving an audio signal that comprises at least a desired source component and at least one interfering source type; and determining a noise suppression gain based on a statistical modeling of at least one feature associated with the audio signal using a mixture model comprising a plurality of model mixtures, each of the plurality of model mixtures being associated with one of the desired source component or an interfering source type of the at least one interfering source type.