AUDIO PROCESSING APPARATUS AND METHOD
First Claim
1. An audio processing apparatus, comprising:
- a main microphone for receiving sounds from a source and noises from non-source sources and generating a main input;
a reference microphone for receiving the sounds and the noises and generating a reference input;
a short-time Fourier transformation (STFT) unit for applying short time Fourier transformation to convert the main input of a time domain signals into a main signal of a frequency domain and convert the reference input of the time domain signals into a reference signal of the frequency domain;
a sensitivity calibrating unit for performing sensitivity calibration on the main signal and the reference signal and generating a main calibrated signal and a reference calibrated signal;
a voice active detector (VAD) for generating a voice active signal according to the main calibrated signal, the reference calibrated signal and a direction of arrival (DOA) signal; and
a beamformer for converting the main calibrated signal into a main channel and converting the reference calibrated signal into a reference channel according to the voice active signal.
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Abstract
An audio processing apparatus is provided, comprising: a main microphone for receiving sounds from a source and noises from non-source sources and generating a main input; a reference microphone for receiving the sounds and the noises and generating a reference input; a short-time Fourier transformation (STFT) unit for applying short time Fourier transformation to convert the main input of a time domain signals into a main signal of a frequency domain and convert the reference input of the time domain signals into a reference signal of the frequency domain; a sensitivity calibrating unit for performing sensitivity calibration on the main signal and the reference signal and generating a main calibrated signal and a reference calibrated signal; and a voice active detector (VAD) for generating a voice active signal according to the main calibrated signal, the reference calibrated signal and a direction of arrival (DOA) signal.
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Citations
26 Claims
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1. An audio processing apparatus, comprising:
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a main microphone for receiving sounds from a source and noises from non-source sources and generating a main input; a reference microphone for receiving the sounds and the noises and generating a reference input; a short-time Fourier transformation (STFT) unit for applying short time Fourier transformation to convert the main input of a time domain signals into a main signal of a frequency domain and convert the reference input of the time domain signals into a reference signal of the frequency domain; a sensitivity calibrating unit for performing sensitivity calibration on the main signal and the reference signal and generating a main calibrated signal and a reference calibrated signal; a voice active detector (VAD) for generating a voice active signal according to the main calibrated signal, the reference calibrated signal and a direction of arrival (DOA) signal; and a beamformer for converting the main calibrated signal into a main channel and converting the reference calibrated signal into a reference channel according to the voice active signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An audio processing method, comprising:
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receiving sounds from a source and noises from non-source sources and generating a main input; receiving the sounds and the noises and generating a reference input; applying short time Fourier transformation to convert the main input of a time domain signals into a main signal of a frequency domain and convert the reference input of the time domain signals into a reference signal of the frequency domain; performing sensitivity calibration on the main signal and the reference signal and generating a main calibrated signal and a reference calibrated signal; generating a voice active signal according to the main calibrated signal, the reference calibrated signal and a direction of arrival (DOA) signal; and converting the main calibrated signal into a main channel and converting the reference calibrated signal into a reference channel according to the voice active signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification