Topic segmentation of TV-streams by watershed transform and vectorization. (January 2015)

• Record Type: Journal Article
• Authors: Claveau, Vincent; Lefèvre, Sébastien
• Is Part Of: Computer speech & language. Volume 29(2015)
• Page Start: 63
• Page End: 80
• Publication Date: 2015-01
• Subjects: Watershed transform -- Image segmentation -- Vectorization -- Topic segmentation; Speech processing systems -- Periodicals; Automatic speech recognition -- Periodicals; Computers -- Periodicals; Linguistics -- Periodicals; Speech-Language Pathology -- Periodicals; Traitement automatique de la parole -- Périodiques; Reconnaissance automatique de la parole -- Périodiques; Automatic speech recognition; Speech processing systems; Electronic journals; Periodicals; 006.454
• DOI: 10.1016/j.csl.2014.04.006
• Languages: English
• ISSNs: 0885-2308

Abstract

Abstract: A fine-grained segmentation of radio or TV broadcasts is an essential step for most multimedia processing tasks. Applying segmentation algorithms to the speech transcripts seems straightforward. Yet, most of these algorithms are not suited when dealing with short segments or noisy data. In this paper, we present a new segmentation technique inspired from the image analysis field and relying on a new way to compute similarities between candidate segments called vectorization. Vectorization makes it possible to match text segments that do not share common words; this property is shown to be particularly useful when dealing with transcripts in which transcription errors and short segments makes the segmentation difficult. This new topic segmentation technique is evaluated on two corpora of transcripts from French TV broadcasts on which it largely outperforms other existing approaches from the state-of-the-art.