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The Automatic Content Linking Device is a just-in-time document retrieval system which monitors an ongoing conversation or a monologue and enriches it with potentially related documents, including multimedia ones, from local repositories or from the Internet. The documents are found using keyword-based search or using a semantic similarity measure between documents and the words obtained from automatic speech recognition. | A Speech-based Just-in-Time Retrieval System using Semantic Search Andrei Popescu-Belis Majid Yazdani Alexandre Nanchen and Philip N. Garner Idiap Research Institute Rue Marconi 19 CP 592 1920 Martigny Switzerland apbelis myazdani ananchen pgarner @idiap.ch Abstract The Automatic Content Linking Device is a just-in-time document retrieval system which monitors an ongoing conversation or a monologue and enriches it with potentially related documents including multimedia ones from local repositories or from the Internet. The documents are found using keyword-based search or using a semantic similarity measure between documents and the words obtained from automatic speech recognition. Results are displayed in real time to meeting participants or to users watching a recorded lecture or conversation. 1 Introduction Enriching a monologue or a conversation with related content such as textual or audio-visual documents on the same topic is a task with multiple applications in the field of computer-mediated humanhuman communication. In this paper we describe the Automatic Content Linking Device ACLD a system that analyzes spoken input from one or more speakers using automatic speech recognition ASR in order to retrieve related content in real-time from a variety of repositories. These include local document databases or archives of multimedia recordings as well as websites. Local repositories are queried using a keyword-based search engine or using a semantic similarity measure while websites are queried using commercial search engines. We will first describe the scenarios of use of the ACLD in Section 2 and review previous systems for 80 just-in-time retrieval in Section 3. The ACLD components will be outlined in Sections 4.1 to 4.5. Four types of evaluation results obtained with our system will finally be summarized in Sections 5.1 to 5.4. 2 Content Linking Scenarios of Use Just-in-time information retrieval i.e. finding useful documents without the need for a user to .
