arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.12475cs.CL
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用于自动语音评分的深度神经专家混合模型

Mixtures of Deep Neural Experts for Automated Speech Scoring

Fondazione Bruno Kessler (FBK)(布鲁诺·凯斯勒基金会)

Sara Papi, Edmondo Trentin, Roberto Gretter, Marco Matassoni, Daniele Falavigna

AI总结:

本文提出一种结合自动语音识别与深度学习多分类器的两模块方法,利用多种文本表示和专家混合模型,在 Spoken CALL Shared Task 挑战赛数据上取得了三项评估指标迄今最高值。

摘要:

本文处理根据语言学习者对测试提示的口语回答来自动评估第二语言熟练度的任务。该任务对计算机辅助语言学习领域具有重要意义。本文提出的方法依赖于两个独立的模块:(1)一个自动语音识别系统,用于生成所涉及口语交互的文本转录;(2)一个基于深度学习器的多分类器系统,用于将转录文本排序到不同的熟练度类别。不同的深度神经网络架构(前馈和循环网络)在文本的多种表示上进行了专门化,这些表示包括:参考语法、概率语言模型的输出、多个词嵌入以及两个词袋模型。单个分类器的组合通过概率伪联合模型或神经专家混合模型来实现。使用第三届 Spoken CALL Shared Task 挑战赛的数据,在三项流行的评估指标上获得了迄今为止的最高值。

英文摘要:

The paper copes with the task of automatic assessment of second language proficiency from the language learners' spoken responses to test prompts. The task has significant relevance to the field of computer assisted language learning. The approach presented in the paper relies on two separate modules: (1) an automatic speech recognition system that yields text transcripts of the spoken interactions involved, and (2) a multiple classifier system based on deep learners that ranks the transcripts into proficiency classes. Different deep neural network architectures (both feed-forward and recurrent) are specialized over diverse representations of the texts in terms of: a reference grammar, the outcome of probabilistic language models, several word embeddings, and two bag-of-word models. Combination of the individual classifiers is realized either via a probabilistic pseudo-joint model, or via a neural mixture of experts. Using the data of the third Spoken CALL Shared Task challenge, the highest values to date were obtained in terms of three popular evaluation metrics.

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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