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arXiv 1606.07136cs.SD
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一个用于研究同伴领导的团队学习小组的发言人日记系统

A Speaker Diarization System for Studying Peer-Led Team Learning Groups

University of Texas at Dallas(德克萨斯大学达拉斯分校)

Harishchandra Dubey, Lakshmish Kaushik, Abhijeet Sangwan, John H. L. Hansen

摘要:

同伴领导的团队学习(PLTL)是一种STEM课程教学模式,小型学生团体定期会面,共同讨论课程。对PLTL会话的自动分析将有助于教育研究人员深入了解学习成果如何受到个人参与,群体行为,团队动力等的影响。为此,语音和语言技术可以提供帮助,而说话人日记技术将为分析奠定基础。在这项研究中,一个新的语料库被称为CRSS-PLTL,包含语音数据从5个PLTL团队在一个学期(10个会话,每个团队5至8名参与者)。在CRSS-PLTL中,每个参与者都佩戴一个LENA设备(便携式录音机),该设备提供事件的多个音频记录。我们提出的解决方案是无监督的,并包含一个新的在线说话人变化检测算法,称为G 3算法结合Hausdorff距离为基础的聚类,以提供更高的检测精度。此外,我们还利用跨渠道的信息来完善我们的日记化假设。所提出的系统提供了良好的改善,在日志出错率(DER)的基线LIUM系统。我们还提出了更高层次的分析,如会话中的会话轮数,以及每个发言者的发言时间(参与)。

英文摘要:

Peer-led team learning (PLTL) is a model for teaching STEM courses where small student groups meet periodically to collaboratively discuss coursework. Automatic analysis of PLTL sessions would help education researchers to get insight into how learning outcomes are impacted by individual participation, group behavior, team dynamics, etc.. Towards this, speech and language technology can help, and speaker diarization technology will lay the foundation for analysis. In this study, a new corpus is established called CRSS-PLTL, that contains speech data from 5 PLTL teams over a semester (10 sessions per team with 5-to-8 participants in each team). In CRSS-PLTL, every participant wears a LENA device (portable audio recorder) that provides multiple audio recordings of the event. Our proposed solution is unsupervised and contains a new online speaker change detection algorithm, termed G 3 algorithm in conjunction with Hausdorff-distance based clustering to provide improved detection accuracy. Additionally, we also exploit cross channel information to refine our diarization hypothesis. The proposed system provides good improvements in diarization error rate (DER) over the baseline LIUM system. We also present higher level analysis such as the number of conversational turns taken in a session, and speaking-time duration (participation) for each speaker.

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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