Article

Article title DEVELOPMENT OF THE METHOD OF FEATURE VECTORS CHARACTERISTICS IN SPEAKER RECOGNITION PROCESS
Authors I.I. Ivanov
Section SECTION I. INFORMATION SECURITY
Month, Year 07, 2015 @en
Index UDC 004.934
DOI
Abstract This paper presents the method allowing use the reconstructed components of state vectors for the identifying users of highly reliable computing systems by coefficients for systems of biometric authentication. The existing identifiable characteristics extraction from the speech signals methods such as method of identifiable feature extraction from speech signals: mel-frequency cepstral coefficient method, a method the cepstral coefficients of a linear prediction are described. The objective of this paper is to present the method allowing to use the reconstructed components of state vectors as the identifying coefficients for systems of biometric authentication of users of highly reliable computing systems. Shortcomings of authentication systems applying spectral characteristics in time-frequency localization (area) are emphasized. The quality of these systems is in direct relationship to speech sample volume of the estimated selection, external noise has a very significant effect on these systems. To solve this problem we developed a method that takes into account the non-stationary and nonlinear dynamics of inner speech production apparatus based on the components of the state of the reconstructed model of the speech process. The numerical experiment was conducted and its results are presented with use of the described model. The object of the research is the speech signals; the samples of words and phonemes from pronunciation database recorded by one speaker were used as an experimental material. For the solution of the task next lines of the experiment were determined: experimental evidence of coefficient consistency obtained from reconstructed state –vector component for [o] and [i] phonemes; experimental evidence of possible use of state vectors obtained from reconstruction coefficient. Numerical experiment evidences were summarized: the obtained state vectors represents individual characteristics of a speaker; near live environment testing (experimenting) indicates the possibility of further practical use; no-need for spectral characteristics application in time frequency localization for identifying feature extraction allows to decrease some negative impact of the environment and avoid pre filtration requirement. Some suggestions for further use of obtained state vectors for authentification systems: clusterization to find average state vector, with the use k-average method, affinity measure identification rectangular metric.

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Keywords Speaker recognition; voice identification; personality state vector; mfcc; mel frequiency cepstral coefficients; lpcc linear prediction cepstral coefficients; components of vector-state model of the speech process.
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