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• W3100604685 startingPage "107732" @default.
• W3100604685 abstract "The utterance can be easily affected by additive noise in a real environment. To decrease the additive noise, the noisy speech can be enhanced based on the spectrogram following with Nonnegative Matrix Factorization (NMF) and sparse NMF(SNMF) algorithm. More information can be obtained at a high sampling rate. The range of objective human vocal organs is limited to a low-frequency value compared to the high sampling rate; thus, higher resolution is required to describe the low frequencies. Traditional spectrogram based on short-time Fourier transform (STFT) may lack frequency resolution at lower frequencies. To this end, we propose to use a constant Q transform (CQT) in this paper, which can give high resolution for the low frequencies. The backend algorithm remains the NMF/SNMF algorithm. We evaluate the proposed method with the Perceptual Evaluation of Speech Quality (PESQ) and Short-Time Objective Intelligibility (STOI). The experimental results show that our proposed method shows better enhancement ability compared to the STFT baseline at low Signal to Noise Ratio (SNR)." @default.
• W3100604685 created "2020-11-23" @default.
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• W3100604685 date "2021-03-01" @default.
• W3100604685 modified "2023-09-24" @default.
• W3100604685 title "Speech enhancement based on nonnegative matrix factorization in constant-Q frequency domain" @default.
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• W3100604685 doi "https://doi.org/10.1016/j.apacoust.2020.107732" @default.
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