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Factorized Sub-Space Estimation for Fast and Memory Effective I-vector Extraction
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DOI：10.1109/TASLP.2013.2290505.png)
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摘要
En 中文
Most of the state-of-the-art speaker recognition systems use a compact representation of spoken utterances referred to as i-vector. Since the standard i-vector extraction procedure requires large memory structures and is relatively slow, new approaches have recently been proposed that are able to obtain either accurate solutions at the expense of an increase of the computational load, or fast approximate solutions, which are traded for lower memory costs. We propose a new approach particularly useful for applications that need to minimize their memory requirements. Our solution not only dramatically reduces the memory needs for i-vector extraction, but is also fast and accurate compared to recently proposed approaches. Tested on the female part of the tel-tel extended NIST 2010 evaluation trials, our approach substantially improves the performance with respect to the fastest but inaccurate eigen-decomposition approach, using much less memory than other methods.
Keyword:
Dictionary
i-vector extraction
i-vectors
probabilistic linear discriminant analysis
speaker recognition.
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