Non-coherent noise reduction for audio enhancement on mobile device

A method, comprising:

• receiving, by a processor, a plurality of signals from a plurality of audio sensors corresponding to a plurality of channels responsive to sensing by the plurality of audio sensors;
• performing non-coherent noise reduction, by a non-coherent noise estimator in the processor, on one or more signals of the plurality of signals to suppress at least one non-coherent noise in each of the one or more signals by:
• individually estimating a respective non-coherent noise corresponding to each frequency band of a plurality of frequency bands of each channel of the plurality of channels;
• and
• determining, for each frequency band of each channel, a respective gain control parameter to provide a plurality of gain control parameters each of which corresponding to a respective frequency band of a plurality of frequency bands of each channel of the plurality of channels such that the respective non-coherent noise associated with a first frequency band of a first channel of the plurality of channels which is worse than the respective non-coherent noise associated with a second frequency band of the first channel is suppressed;
• combining, by the processor, the plurality of signals subsequent the noise reduction to generate an output signal;
• and
• performing beamforming on the plurality of signals using:
• the plurality of signals subsequent filtering by all-pass filters;
• and
• an output of the non-coherent noise estimator to generate the output signal.

An apparatus, comprising:

• a plurality of audio sensors configured to sense a plurality of channels;
• and
• a processor coupled to the plurality of audio sensors, the processor configured to perform operations comprising:
• receiving a plurality of signals from the plurality of audio sensors responsive to sensing by the plurality of audio sensors;
• performing a non-coherent noise reduction, by a non-coherent noise estimator in the processor, on one or more signals of the plurality of signals to suppress at least one non-coherent noise in each of the one or more signals based on a respective signal-to-noise ratio (SNR) associated with each of the one or more signals;
• combining the plurality of signals subsequent the noise reduction to generate an output signal;
• performing beamforming on the plurality of signals using:
• the plurality of signals subsequent filtering by all-pass filters;
• and
• an output of the non-coherent noise estimator to generate the output signal;
• and
• performing artificial-intelligence (AI) noise reduction on the plurality of signals subsequent the beamforming to generate the output signal.