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arXiv 2203.14867eess.AScs.SD
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连续度量学习用于跨低资源语言的可迁移语音情感识别和嵌入

Continuous Metric Learning For Transferable Speech Emotion Recognition and Embedding Across Low-resource Languages

Technical University of Denmark(丹麦技术大学);Copenhagen University Hospital(哥本哈根大学医院);Copenhagen University(哥本哈根大学)

Sneha Das, Nicklas Leander Lund, Nicole Nadine Lønfeldt, Anne Katrine Pagsberg, Line H. Clemmensen

摘要:

语音情感识别是指从语音信号中推断出个体情感状态的技术。SER由于其广泛的适用性而继续引起人们的兴趣。尽管该领域主要建立在信号处理、机器学习和深度学习的基础上,但在语言上进行推广仍然是一个挑战。然而,由于在最常用语言之外的数据和标签方面缺乏足够的资源,开发可推广和可转移的模型至关重要。为了提高语言的性能,我们提出了一个半监督的去噪自动编码器,使用基于激活或效价的连续度量损失。这项工作的新颖之处在于我们提出了连续度量学习的建议,这是我们所知的关于该主题的第一个建议。此外,为了解决传输数据集中缺乏激活和效价标签的问题,我们用对应于情绪维度模型的激活和效价水平来注释信号样本,然后将其用于评估传输数据集上的嵌入质量。我们表明,所提出的半监督模型始终优于基线无监督方法,这是一个传统的去噪自动编码器,在情感分类精度以及相关性方面的维度变量。进一步评估的分类精度相对于参考,一个BERT为基础的语音表示模型,表明所提出的方法是可比的参考方法在分类特定的情感类在一个低得多的复杂性。

英文摘要:

Speech emotion recognition~(SER) refers to the technique of inferring the emotional state of an individual from speech signals. SERs continue to garner interest due to their wide applicability. Although the domain is mainly founded on signal processing, machine learning, and deep learning, generalizing over languages continues to remain a challenge. However, developing generalizable and transferable models are critical due to a lack of sufficient resources in terms of data and labels for languages beyond the most commonly spoken ones. To improve performance over languages, we propose a denoising autoencoder with semi-supervision using a continuous metric loss based on either activation or valence. The novelty of this work lies in our proposal of continuous metric learning, which is among the first proposals on the topic to the best of our knowledge. Furthermore, to address the lack of activation and valence labels in the transfer datasets, we annotate the signal samples with activation and valence levels corresponding to a dimensional model of emotions, which were then used to evaluate the quality of the embedding over the transfer datasets. We show that the proposed semi-supervised model consistently outperforms the baseline unsupervised method, which is a conventional denoising autoencoder, in terms of emotion classification accuracy as well as correlation with respect to the dimensional variables. Further evaluation of classification accuracy with respect to the reference, a BERT based speech representation model, shows that the proposed method is comparable to the reference method in classifying specific emotion classes at a much lower complexity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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