Shpak Z. Methods and means for the slowdown playback of speech information in the interactive control systems

The dissertation presents the elaboration of theoretical bases, methods, algorithms and means for slowing down the voice-message delivery rate in the interactive control systems. Time-scale transformation regularity of Ukrainian language structural units at lower speech rates has been investigated. Non-linear analytic function presenting the temporal changes of sound duration have been plotted. A new time-domain slowdown method based on differentiated expansion of the speech unit sounding according to the plotted temporal functions has been developed. The algorithm of speech segmentation into phone sections and procedures of the adaptive transformations of different nature sound structures have been elaborated. The transformation processes in these procedures do not change the spectral composition of modified sounds. New solutions to linear methods of speech expansion have been found. The schemes for the machine real-time realisation of the said methods are presented. A many-functional programme comple x for the computer speech rate-change playback has been designed. The results of the dissertation have found practical implementation in various voice signals processing technologies.