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- W172276452 abstract "Language models (LMs) are important in automatic speech recognition systems. In this paper, we propose a new approach to a topic dependent LM, where the topic is decided in an unsupervised manner. Latent Semantic Analysis (LSA) is employed to reveal hidden (latent) relations among nouns in the context words. To decide the topic of an event, a fixed size word history sequence (window) is observed, and voting is then carried out based on noun class occurrences weighted by a confidence measure. Experiments on the Wall Street Journal corpus and Mainichi Shimbun (Japanese newspaper) corpus show that our proposed method gives better perplexity than the comparative baselines, including a word-based/class-based n-gram LM, their interpolated LM, a cache-based LM, and the Latent Dirichlet Allocation (LDA)-based topic dependent LM. Index Terms: topic dependent, language model, latent semantic analysis, topic voting" @default.
- W172276452 created "2016-06-24" @default.
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- W172276452 date "2009-09-06" @default.
- W172276452 modified "2023-10-18" @default.
- W172276452 title "Topic dependent language model based on topic voting on noun history" @default.
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- W172276452 doi "https://doi.org/10.21437/interspeech.2009-124" @default.
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