Monaural Noise Suppression Based on Computational Auditory Scene Analysis

A system for performing noise reduction in an audio signal, the system comprising:

• a memory;
• an analysis module stored in the memory and executed by a processor to transform a time-domain acoustic to frequency-domain sub-band signals;
• a source inference engine stored in the memory and executed by a processor to track multiple sources of pitch within the sub-band signals and to generate a speech model and one or more noise models based on the tracked pitch sources;
• and
• a modifier module stored in the memory and executed by a processor to perform noise reduction on the sub-band signals based on the speech model and one or more noise models.

A non-transitory computer readable storage medium having embodied thereon a program, the program being executable by a processor to perform a method for reducing noise in an audio signal, the method comprising:

• transforming an acoustic signal from a time-domain signal to frequency-domain sub-band signals;
• tracking multiple sources of pitch within the sub-band signals;
• generating a speech model and one or more noise models based on the tracked pitch sources;
• and
• performing noise reduction on the sub-band signals based on the speech model and one or more noise models.