Searching for authors named "Nikos Fakotakis" – sorted by Relevance.
27 documents found, showing 1 through 10.
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Text Tokenization for Knowledge-free Automatic Extraction of Lexical Similarities
- …Previous studies on automatic extraction of lexical similarities have considered as semantic unit of text the word. However, the theory of contextual lexical semantics implies that larger segments of text, namely non-compositional multiwords, are more appropriate for this role. We experimentally tes…
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Impostor Modelling Techniques For Speaker Verification Based On Probabilistic Neural Networks
- …The impact of two different impostor modelling techniques on the performance of a Probabilistic Neural Networks (PNNs)-based text-independent speaker verification system is studied. Depending on the technique used for background codebook construction, two versions of the system are obtained: with on…
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Text-Independent Speaker Verification: The WCL-1 System
- …A text-independent Probabilistic Neural Network (PNN)-based speaker verification system, referred to as WCL-1, is presented. A modular structure, with a distinct PNN for each enrolled speaker, is employed. A gender -dependent universal background model is created to represent the world of possib…
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AUTOMATIC ACOUSTIC IDENTIFICATION OF CRICKETS AND CICADAS
- …The general problem addressed in this work is automatic identification of insects using only the acoustic modality. In particular, we discuss the characteristics of the acoustic profiles of two target groups of insects: crickets and cicadas. Subsequently, we employ advanced machine learning techniqu…
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Evaluation of speech parameterization methods for speaker recognition
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Speech Recognition using Wavelet Packet Features
- …In view of the growing use of automatic speech recognition in the modern society, we study various alternative representations of the speech signal that have the potential to contribute to the improvement of the recognition performance. Specifically, the main targets of the present article are to ov…
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Toward 2003 NIST Speaker Recognition Evaluation: The WCL-1 System
- …A detailed description of our text-independent speaker verification (SV) system, referred to as WCL-1, a participant in the one-speaker detection task of the 2003 NIST Speaker Recognition Evaluation (SRE) is presented. It is an improved version of our baseline system, which has successfully particip…
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Traffic Safety Facts 2000: A Compilation of Motor Vehicle Crash Data from the Fatality Analysis Reporting System and the General Estimates System
- …Abstract. Most feature extraction techniques involve in their primary stage a Discrete Fourier Transform (DFT) of consecutive, short, overlapping windows. The spectral resolution of the DFT representation is uniform and is given by Δf=2π/Ν where N is the length of the window The present paper invest…
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Text-Independent Speaker Verification Based on Probabilistic Neural Networks
- …In this paper , a text-independent Probabilistic Neural Network (PNN)-based Speaker Verification system is presented. Modular structure with a distinct PNN for each enrolled speaker is used. A gender-dependent universal background model is built to represent the impostor speakers. A detailed desc…
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Comparative evaluation of various MFCC implementations on the speaker verification task
- …Making no claim of being exhaustive, a review of the most popular MFCC (Mel Frequency Cepstral Coefficients) implementations is made. These differ mainly in the particular approximation of the nonlinear pitch perception of human, the filter bank design, and the compression of the filter bank output.…
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