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Automatic speech recordings segmentation tool
 Santa, Roman ; Zvončák, Vojtěch (oponent) ; Kováč, Daniel (vedoucí práce)
Automatic Segmentation tool processes recordings in order to extract voiced parts. It is important for further speech analysis to work only with extracted speech and not noise. For analysis of the difference between syllables of patients with parkinson disease and heatlhy ones, this segmentation tool should help with processing recordings. Goal of this thesis is to implement and test voice detectors with Google WebRTC detector and pick the best speech detector with minimal error rate. Also, develop a segmentation tool for given recordings and test voice recognition with dymanic time warping. Database from the Brain Diseases Analysis Laboratory was used. It contains czech and hungarian recordings with equal number of male and female as well as heathy and diseased patients. Energy detector performed as the best detetor in the tests. There was no significant difference in error rates between male and female or healthy and diseased patients. Recordings with lower Signal-to-Noise ratio were harder to process with an error rate starting at 12\%. Based on the results, new detector for the segmentation tool was proposed to process examined recordings. Finally, dynamic time warping algorithm was tested with mel frequency cepstral coefficients to recognize similarities between speakers.
Úplný záznam
Automatic speech recordings segmentation tool
 Santa, Roman ; Zvončák, Vojtěch (oponent) ; Kováč, Daniel (vedoucí práce)
Automatic Segmentation tool processes recordings in order to extract voiced parts. It is important for further speech analysis to work only with extracted speech and not noise. For analysis of the difference between syllables of patients with parkinson disease and heatlhy ones, this segmentation tool should help with processing recordings. Goal of this thesis is to implement and test voice detectors with Google WebRTC detector and pick the best speech detector with minimal error rate. Also, develop a segmentation tool for given recordings and test voice recognition with dymanic time warping. Database from the Brain Diseases Analysis Laboratory was used. It contains czech and hungarian recordings with equal number of male and female as well as heathy and diseased patients. Energy detector performed as the best detetor in the tests. There was no significant difference in error rates between male and female or healthy and diseased patients. Recordings with lower Signal-to-Noise ratio were harder to process with an error rate starting at 12\%. Based on the results, new detector for the segmentation tool was proposed to process examined recordings. Finally, dynamic time warping algorithm was tested with mel frequency cepstral coefficients to recognize similarities between speakers.
Úplný záznam

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