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MICROPHONE ARRAY STRUCTURE ABLE TO REDUCE NOISE AND IMPROVE SPEECH QUALITY AND METHOD THEREOF
MICROPHONE ARRAY STRUCTURE ABLE TO REDUCE NOISE AND IMPROVE SPEECH QUALITY AND METHOD THEREOF
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机译:可降低噪声并提高语音质量的麦克风阵列结构及其方法
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摘要
The present invention discloses a microphone array structure able to reduce noise and improve speech quality and a method thereof. The method of the present invention comprises steps: using at least two microphone to receive at least two microphone signals each containing a noise signal and a speech signal; using FFT modules to transform the microphone signals into frequency-domain signals; calculating an included angle between a speech signal and a noise signal of the microphone signal, and selecting a phase difference estimation algorithm, a noise reduction algorithm or both to reduce noise according to the included angle; if the phase difference estimation algorithm is used, calculating phase difference of the microphone signals to obtain a time-space domain mask signal; and multiplying the mask signal and the average of the microphone signals to obtain the speech signals of the microphone signals. Thereby is eliminated noise and improve speech quality.
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