Microphone partial occlusion detector

摘要

Digital signal processing for microphone partial occlusion detection is described. In one embodiment, an electronic system for audio noise processing and for noise reduction, using a plurality of microphones, includes a first noise estimator to process a first audio signal from a first one of the microphones, and generate a first noise estimate. The electronic system also includes a second noise estimator to process the first audio signal, and a second audio signal from a second one of the microphones, in parallel with the first noise estimator, and generate a second noise estimate. A microphone partial occlusion detector determines a low frequency band separation of the first and second audio signals and a high frequency band separation of the first and second audio signals to generate a microphone partial occlusion function that indicates whether one of the microphones is partially occluded.

主权项

1. An electronic system for audio noise processing and for noise reduction, using a plurality of microphones, comprising:
a first noise estimator to process a first audio signal from a first one of the microphones, and generate a first noise estimate; a second noise estimator to process the first audio signal, and a second audio signal from a second one of the microphones, in parallel with the first noise estimator, and generate a second noise estimate; a microphone partial occlusion detector to determine a low frequency band separation of the first and second audio signals and a high frequency band separation of the first and second audio signals, to generate a microphone partial occlusion function that indicates whether one of the microphones is partially occluded; and a combiner-selector to receive the first and second noise estimates, and to generate an output noise estimate using the first and second noise estimates, wherein the combiner-selector is to generate its output noise estimate also based on the microphone partial occlusion function, wherein the combiner-selector selects the first noise estimate for its output noise estimate, and not the second noise estimate, when the microphone partial occlusion function indicates that the second one of the microphones is partially occluded.