Language modeling structures in audio transcription for retrieval of historical speeches

M. Kurimo, B. Zhou, R. Huang, J.H.L. Hansen

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    Abstract

    In this paper we apply speech recognition for automatic transcript generation for spoken document retrieval. The transcripts are used to compute an index for an archive of historical speeches and to provide the index, speech, and transcripts available for query based retrieval and browsing. In addition to acoustic variability, the task is challenging, because it covers a broad spectrum of different speaking styles and use of language. Language modeling is important for speech recognition to determine the prior probabilities of the compared word and sentence candidates in decoding. Various large text corpora are available in electronic format for language model training, but the open question is what and how should we include to improve the audio transcripts of this task. In this work we compare large overall language models to focused ones trained on selected subsets of the data, and to combinations between both. With respect to the potential index terms, improvements were obtained for transcripts that did not fit well to the scope of the large overall language model.

    Original languageEnglish
    Title of host publicationEuropean Signal Processing Conference, EUSIPCO 2004, Vienna, Austria, Sept. 6-10, 2004
    Pages557-560
    Number of pages4
    Volume06-10-September-2004
    ISBN (Electronic)9783200001657
    Publication statusPublished - 3 Apr 2004
    MoE publication typeA4 Article in a conference publication
    EventEuropean Signal Processing Conference - Vienna, Austria
    Duration: 6 Sep 200410 Sep 2004
    Conference number: 12

    Conference

    ConferenceEuropean Signal Processing Conference
    Abbreviated titleEUSIPCO
    CountryAustria
    CityVienna
    Period06/09/200410/09/2004

    Keywords

    • historical speeches
    • language modeling
    • speech recognition
    • speech retrieval

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