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arXiv 1907.01302cs.CL
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基于潜在Dirichlet分配的自动语音识别声学数据选择

Latent Dirichlet Allocation Based Acoustic Data Selection for Automatic Speech Recognition

Microsoft(微软);University of Sheffield(谢菲尔德大学)

Mortaza, Doulaty, Thomas Hain

摘要:

从大量的不同的域外数据中选择域内数据是一个重要的问题。在大多数情况下,简单地使用所有可用数据将导致次优性能,在某些情况下,与仔细选择匹配集相比,甚至更差。即使对于数据效率低下的神经模型也是如此。声学潜在狄利克雷分配(aLDA)是有用的,在各种语音技术相关的任务,包括领域自适应的声学模型自动语音识别和实体标记的信息检索。在本文中,我们建议使用aLDA作为数据选择框架中的数据相似性标准。给定大量的域外和潜在不匹配的数据,任务是选择最佳匹配的训练数据到从目标域采样的一组代表性话语。我们的目标数据包括大约32小时的会议数据(远场和近距离通话),池中包含2000小时的会议、谈话、语音搜索、听写、命令和控制、有声读物、讲座、通用媒体和电话语音数据。所提出的用于训练数据选择的技术显著优于随机选择、基于后验的选择以及使用所有可用数据。

英文摘要:

Selecting in-domain data from a large pool of diverse and out-of-domain data is a non-trivial problem. In most cases simply using all of the available data will lead to sub-optimal and in some cases even worse performance compared to carefully selecting a matching set. This is true even for data-inefficient neural models. Acoustic Latent Dirichlet Allocation (aLDA) is shown to be useful in a variety of speech technology related tasks, including domain adaptation of acoustic models for automatic speech recognition and entity labeling for information retrieval. In this paper we propose to use aLDA as a data similarity criterion in a data selection framework. Given a large pool of out-of-domain and potentially mismatched data, the task is to select the best-matching training data to a set of representative utterances sampled from a target domain. Our target data consists of around 32 hours of meeting data (both far-field and close-talk) and the pool contains 2k hours of meeting, talks, voice search, dictation, command-and-control, audio books, lectures, generic media and telephony speech data. The proposed technique for training data selection, significantly outperforms random selection, posterior-based selection as well as using all of the available data.

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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