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- W2088857750 abstract "The efficiency of pattern recognition algorithms is highly conditioned to a proper definition of the patterns assumed to structure the data. The multigram model provides a statistical tool to retrieve sequential variable-length regularities within streams of data. In this paper, we present a general formulation of the model, applicable to single or multiple parallel strings of data having either discrete or continuous values. The model is first assessed to derive an inventory of variable-length sequences of letters from text data, where all spaces between the words have been removed. It turns out that the sequences of letters inferred during this fully unsupervised procedure clearly relate to the morphological structure of the text. The model is then used to infer a set of variable-length acoustic units, directly from speech data. Speech files containing examples of acoustic units are provided along with this paper in order to illustrate their consistency from an auditory point of view. We also report experiments using these acoustically defined units for continuous speech recognition. L'efficacité des algorithmes de reconnaissance des formes est fortement conditionnée par la définition adéquate des formes censées structurer les données. Le modèle multigramme fournit un outil statistique permettant de retrouver des régularités séquentielles de longueur variable dans des flux de données. Dans cet article, nous présentons une formulation générale de ce modèle, applicable à des flux, uniques ou multiples, de données, ayant des valeurs discrètes ou continues. La première évaluation du modèle concerne l'extraction, à partir de données textuelles, d'un répertoire de séquences de lettres de longueur variable, dans lesquelles tous les espaces entre mots ont été supprimés. Il apparaı̂t que les séquences de lettres inférées lors de cette procédure totalement non supervisée sont clairement liées à la structure morphologique du texte. Le modèle est ensuite utilisé pour inférer, directement à partir des données de parole, un ensemble d'unités acoustiques de longueur variable. Des fichiers audio contenant des exemples d'unités acoustiques sont fournis avec cet article afin de montrer leur consistance d'un point de vue auditif. Cet article rend également compte des résultats d'expériences utilisant ces unités, définies acoustiquement, pour la reconnaissance de parole continue." @default.
- W2088857750 created "2016-06-24" @default.
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- W2088857750 date "1997-11-01" @default.
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- W2088857750 title "Inference of variable-length linguistic and acoustic units by multigrams" @default.
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- W2088857750 doi "https://doi.org/10.1016/s0167-6393(97)00048-4" @default.
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