{'fraction_non_alphanumeric': 0.021551724137931036, 'fraction_numerical': 0.0, 'mean_word_length': 5.588652482269503, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
NOISE-ADAPTIVE DEEP NEURAL NETWORK FOR SINGLE-CHANNEL SPEECH ENHANCEMENT

We introduce a noise-adaptive feed-forward deep neural network (DNN) for single-channel speech enhancement. The goal is to better exploit individual noise characteristics while training a spectral mapping DNN. To this end, we employ noise-dependent adaptation vectors, which are obtained based on the output of an auxiliary noise classification DNN, to adjust the weights and biases of the spectral mapping DNN. The parameters of the spectral mapping DNN, noise classification DNN and adaptation vectors are estimated jointly during the training stage. During the enhancement stage, we combine a classical unsupervised speech enhancement algorithm with the proposed DNN-based approach to further improve the enhanced speech quality. Experiments show that the proposed method provides better enhancement performance than the selected benchmark algorithms.