Noise Suppression for Sending Voice with Binaural Microphones
AssigneeSony Ericsson Mobile Communications AB
InventorMartin Nyström
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Abstract
Noise-suppressing techniques using a dual-microphone headset include methods in which first and second audio input signals are generated from first and second microphones placed in or near a user's ears, or on each side of the user's throat. These audio input signals are correlated, to produce a correlation signal, and are also combined, to produce an intermediate audio signal. An output audio signal is generated by selectively adjusting the amplitude of the intermediate audio signal, based on the correlation signal, to emphasize correlated components of the first and second audio input signals, relative to uncorrelated components.
Claims14
A method for suppressing noise using a dual-microphone headset, the method comprising:
- generating first and second audio input signals from first and second microphones placed in or near a user's ears, or placed on each side of the user's throat;
- correlating the first and second audio input signals to produce a correlation signal;
- combining the first and second audio input signals, to produce an intermediate audio signal;
- generating an output audio signal by selectively adjusting the amplitude of the intermediate audio signal, based on the correlation signal, to emphasize correlated components of the first and second audio input signals, relative to uncorrelated components.
A noise-suppression system, comprising:
- a dual-microphone headset configured to provide first and second audio input signals from first and second microphones configured for placement in or near a user's ears, or on each side of the user's throat;
- and
- an audio processing circuit comprising:
- a correlator circuit configured to correlate the first and second audio input signals to produce a correlation signal;
- a combiner circuit configured to combine the first and second audio input signals, to produce an intermediate audio signal;
- and
- a gain circuit configured to generate an output audio signal by selectively adjusting the amplitude of the intermediate audio signal, based on the correlation signal, to emphasize correlated components of the first and second audio input signals, relative to uncorrelated components.
Dependencies are inferred from the claim text.