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US 8,300,846 B2Granted
Appratus and method for preventing noise
AssigneeSamusung Electronics Co., Ltd.
InventorsKyu-hong Kim, Kwang-cheol Oh
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Abstract
Provided are an apparatus and method for preventing noise. The apparatus estimates a noise signal from a signal transformed into a frequency domain, uses the estimated noise signal to estimate the amplitude of the frequency-domain signal according to a frequency band, and then calculates a phase difference according to a frequency band and eliminates or prevents noise from the amplitude-estimated frequency-domain signal based on the calculated phase difference according frequency band.
Claims19
A noise preventing apparatus comprising:
- a noise power estimator to estimate a noise signal from a sound signal transformed into a frequency-domain signal;
- an amplitude estimator to estimate an amplitude of the frequency-domain signal according to a frequency band using the estimated noise signal;
- and a phase filter to calculate a phase difference according to a frequency band from the amplitude-estimated frequency-domain signal and eliminate or prevent noise based on the phase difference according to the frequency band, wherein the phase difference is between two microphone signals corresponding to microphones which receive the sound signal.
A method for preventing noise, the method comprising:
- receiving a sound signal and transforming the sound signal into a frequency-domain signal;
- estimating a noise signal from the frequency-domain signal;
- estimating an amplitude of the frequency-domain signal according to a frequency band using the estimated noise signal;
- calculating a phase difference according to a frequency band from the amplitude-estimated frequency-domain signal and eliminating or preventing noise based on the phase difference according to the frequency band;
- and transforming the frequency-domain signal from which the noise has been eliminated or prevented into a time-domain signal, wherein the phase difference is between two microphone signals corresponding to microphones which receive the sound signal.
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Dependencies are inferred from the claim text.