Study of Entity-Topic Models for OOV Proper Name Retrieval
Identifieur interne : 000341 ( Main/Exploration ); précédent : 000340; suivant : 000342Study of Entity-Topic Models for OOV Proper Name Retrieval
Auteurs : Imran Sheikh [France] ; Irina Illina [France] ; Dominique Fohr [France]Source :
English descriptors
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Abstract
Retrieving Proper Names (PNs) relevant to an audio documentcan improve speech recognition and content based audio-videoindexing. Latent Dirichlet Allocation (LDA) topic model hasbeen used to retrieve Out-Of-Vocabulary (OOV) PNs relevant toan audio document with good recall rates. However, retrieval ofOOV PNs using LDA is affected by two issues, which we studyin this paper: (1)Word Frequency Bias (less frequent OOV PNsare ranked lower); (2) Loss of Specificity (the reduced topicspace representation loses lexical context). Entity-Topic modelshave been proposed as extensions of LDA to specifically learnrelations between words, entities (PNs) and topics. We studyOOV PN retrieval with Entity-Topic models and show that theyare also affected by word frequency bias and loss of specificity.We evaluate our proposed methods for rare OOV PN re-rankingand lexical context re-ranking for LDA as well as for Entity-Topic models. The results show an improvement in both Recalland the Mean Average Precision.
Url:
Affiliations:
- France
- Grand Est, Lorraine (région)
- Metz, Nancy
- Institut national polytechnique de Lorraine, Université Nancy 2, Université de Lorraine
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Le document en format XML
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<front><div type="abstract" xml:lang="en">Retrieving Proper Names (PNs) relevant to an audio documentcan improve speech recognition and content based audio-videoindexing. Latent Dirichlet Allocation (LDA) topic model hasbeen used to retrieve Out-Of-Vocabulary (OOV) PNs relevant toan audio document with good recall rates. However, retrieval ofOOV PNs using LDA is affected by two issues, which we studyin this paper: (1)Word Frequency Bias (less frequent OOV PNsare ranked lower); (2) Loss of Specificity (the reduced topicspace representation loses lexical context). Entity-Topic modelshave been proposed as extensions of LDA to specifically learnrelations between words, entities (PNs) and topics. We studyOOV PN retrieval with Entity-Topic models and show that theyare also affected by word frequency bias and loss of specificity.We evaluate our proposed methods for rare OOV PN re-rankingand lexical context re-ranking for LDA as well as for Entity-Topic models. The results show an improvement in both Recalland the Mean Average Precision.</div>
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