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Application of Mel Cepstral Representation of Voice Recordings for Diagnosing Vocal Disorders

Grygiel J., Strumiłło P., Niebudek-Bogusz E.

Przegląd Elektrotechniczny

2012

R. 88, nr 6

8-11

The aim of this study was to assess the applicability of Mel Frequency Cepstral Coefficients (MFCC) of voice samples in diagnosing vocal nodules and polyps. Patients’ voice samples were analysed acoustically with the measurement of MFCC and values of the first three formants. Classification of mel coefficients was performed by applying the Sammon Mapping and Support Vector Machines. For the tests conducted on 95 patients, voice disorders were detected with accuracy reaching approx. 80%.

Celem niniejszej pracy była ocena możliwości zastosowania analizy tzw. współczynników cepstralnych (ang. Mel Cepstral Coefficients (MFCC)) dla próbek rejestrowanego głosu pacjentów we wspomaganiu diagnozy guzów i polipów. Rejestracje mowy pacjentów poddane zostały analizie akustycznej, w której zastosowano parametry MFCC oraz wartości trzech pierwszych formantów. Do klasyfikacji współczynników cepstralnych zastosowano odwzorowanie Sammona oraz tzw. Maszynę Wektorów Nośnych. W testach wykonanych dla 95 rejestracji mowy pacjentów, zaburzenia głosu zostały wykryte z ok. 80% dokładnością.

Wspomaganie realizacji grupowego projektu IT w oparciu o system SVN

Mielcarek K., Pławiak-Mowna A.

Metody Informatyki Stosowanej

2011

nr 2

81-89

In the paper was presented a practical approach to application of example of version control system in educational process in University of Zielona Góra, Poland, Faculty of Electrical Engineering, Computer Science and Telecommunications. Competence in effective working with design documentation is one of the most important aspects of technical education of engineers. The presented tools [5, 6, 7] allows to monitor versions of project files of any type and to simulate real-life IT project development. There has been presented principles of group work (different phases, section 2, [1, 3]) with great stress on analysis of requirements, planning, designing and testing which fulfils guidelines of education standards for Group IT Project including preservation of details in documentation, team building and leader selection. Presented practical approach preserve guidelines of education standards including hierarchical structure of project teams, team’s leaders and superior role for teacher (superior access rights). There has been presented in a short way how to configure, create and manage repositories based on real life application on University of Zielona Góra servers. In addition to this, applying SVN gives ability of working with widely used version control system, increase mobility and simplifies creating and moving workspace. The same team division can be achieved in classes and outside University. All presented software is free of charge, is easy to obtain and simple to configure.