Phoneme sequence recognition via DTW-based classification
| Autor: | Abdullah Mueen, Amy T. Neel, Hossein Hamooni |
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| Rok vydání: | 2015 |
| Předmět: |
Sequence
Dynamic time warping Computer science business.industry Speech recognition Big data Pattern recognition 02 engineering and technology Task (project management) Human-Computer Interaction ComputingMethodologies_PATTERNRECOGNITION Artificial Intelligence Hardware and Architecture 020204 information systems Vowel Classifier (linguistics) 0202 electrical engineering electronic engineering information engineering 020201 artificial intelligence & image processing Segmentation Artificial intelligence Layer (object-oriented design) business Software Information Systems |
| Zdroj: | Knowledge and Information Systems. 48:253-275 |
| ISSN: | 0219-3116 0219-1377 |
| Popis: | Phonemes are the smallest units of sound produced by a human being. Automatic classification of phonemes is a well-researched topic in linguistics due to its potential for robust speech recognition. With the recent advancement of phonetic segmentation algorithms, it is now possible to generate datasets of millions of phonemes automatically. Phoneme classification on such datasets is a challenging data mining task because of the large number of classes (over a hundred) and complexities of the existing methods. In this paper, we introduce the phoneme classification problem as a data mining task. We propose a dual-domain (time and frequency) hierarchical classification algorithm. Our method uses a dynamic time warping (DTW)-based classifier in the top layers and time---frequency features in the lower layer. We cross-validate our method on phonemes from three online dictionaries and achieved up to 35 % improvement in classification compared with existing techniques. We further modify our vowel classifier by adopting DTW distance over time---frequency coefficients and gain an additional 3 % improvement. We provide case studies on classifying accented phonemes and speaker-invariant phoneme classification. Finally, we show a demonstration of how phoneme classification can be used to recognize speech. |
| Databáze: | OpenAIRE |
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