The objective of this work is to investigate the influence of the different time-scale modification (TSM) methods on the quality of the speech stretched up using the designed non-uniform real-time speech time-scale modification algorithm (NU-RTSM). The algorithm provides a combination of the typical TSM algorithm with the vowels, consonants, stutter, transients and silence detectors. Based on the information about the content and on the estimated value of the rate of speech (ROS), the algorithm adapts to the scaling factor value, and removes the redundant signal i.e. silence, stutter and transients. TSM algorithms named: SOLA, PSOLA and WSOLA were examined in order to assess the quality of the stretched speech, the complexity of the calculation and the possibility of their usage in the NU-RTSM algorithm. Subjective tests were performed in order to compare the quality of various time-scaling meth-ods.
Authors
Additional information
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2011
