Speech Enhancement Combining NMF Weighted by Speech Presence Probability and Statistical Model

Hu, Yonggang; Zhang, Xiongwei; Zou, Xia; Min, Gang; Sun, Meng; Zheng, Yunfei

doi:10.1587/transfun.e98.a.2701

Cited by 3 publications

(1 citation statement)

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“…Duong et al [23] used temporal annotations as weights to highlight frames with less active sources, while a particular type of perceptually motivated weight was introduced in the literature [24] to model the loudness perception of the human auditory system. A very similar work to ours is the one in the literature [25], which used NMF weighted by speech presence probability for speech enhancement.…”

Section: Introductionmentioning

confidence: 83%

Adaptive Noise Reduction for Sound Event Detection Using Subband-Weighted NMF

Zhou

Feng

Benetos

2019

Sensors

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Sound event detection in real-world environments suffers from the interference of non-stationary and time-varying noise. This paper presents an adaptive noise reduction method for sound event detection based on non-negative matrix factorization (NMF). First, a scheme for noise dictionary learning from the input noisy signal is employed by the technique of robust NMF, which supports adaptation to noise variations. The estimated noise dictionary is used to develop a supervised source separation framework in combination with a pre-trained event dictionary. Second, to improve the separation quality, we extend the basic NMF model to a weighted form, with the aim of varying the relative importance of the different components when separating a target sound event from noise. With properly designed weights, the separation process is forced to rely more on those dominant event components, whereas the noise gets greatly suppressed. The proposed method is evaluated on a dataset of the rare sound event detection task of the DCASE 2017 challenge, and achieves comparable results to the top-ranking system based on convolutional recurrent neural networks (CRNNs). The proposed weighted NMF method shows an excellent noise reduction ability, and achieves an improvement of an F-score by 5%, compared to the unweighted approach.

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Section: Introductionmentioning

confidence: 83%