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arXiv 1601.02539cs.CLcs.NE
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用于语音合成的门控循环神经网络研究

Investigating gated recurrent neural networks for speech synthesis

The Centre for Speech Technology Research, University of Edinburgh, United Kingdom(英国爱丁堡大学语音技术研究中心)

Zhizheng Wu, Simon King

摘要:

最近,循环神经网络(RNN)作为强大的序列模型已经重新出现,作为一个潜在的声学模型的统计参数语音合成(SPSS)。长短期记忆(LSTM)架构特别有吸引力,因为它解决了标准RNN中的梯度消失问题,使它们更容易训练。尽管最近的研究表明,LSTM在SPSS上的性能明显优于深度前馈神经网络,但人们对其中的原因知之甚少。在这里,我们试图回答两个问题:a)为什么LSTM作为SPSS的序列模型工作得很好; b)哪个组件(例如,输入门、输出门、遗忘门)是最重要的。我们提出了一个可视化的分析,以及一系列的实验,从而在一个简化的架构的建议。简化的架构具有比LSTM少得多的参数,因此在不降低质量的情况下大大降低了生成复杂度。

英文摘要:

Recently, recurrent neural networks (RNNs) as powerful sequence models have re-emerged as a potential acoustic model for statistical parametric speech synthesis (SPSS). The long short-term memory (LSTM) architecture is particularly attractive because it addresses the vanishing gradient problem in standard RNNs, making them easier to train. Although recent studies have demonstrated that LSTMs can achieve significantly better performance on SPSS than deep feed-forward neural networks, little is known about why. Here we attempt to answer two questions: a) why do LSTMs work well as a sequence model for SPSS; b) which component (e.g., input gate, output gate, forget gate) is most important. We present a visual analysis alongside a series of experiments, resulting in a proposal for a simplified architecture. The simplified architecture has significantly fewer parameters than an LSTM, thus reducing generation complexity considerably without degrading quality.

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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