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Abstrakty
In this paper a new pitch shifter using a complex instantaneous frequency rescaler and direct digital synthesizer is presented aimed at au application in a handset calling signal composer. The pitch shifter introduced here exhibits an excellent performance as a gen-erator of different melodies, where the sound of each note in a melody, e.g., imitating a popular hit, is derived from a short recording of a voice of a chosen creature via complex dynamic representation processing.
Rocznik
Tom
Strony
499--504
Opis fizyczny
Bibliogr. 11 poz., rys., tab.
Twórcy
autor
autor
- Multimedia Systems Department, Faculty of Electronies, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Narutowicza St., 80-952 Gdańsk, Poland, hewa@eti.pg.gda.pl
Bibliografia
- [1] E. Chassande-Mottin and P. Flandrin, “On the time-frequency detection of chirps”, Applied and Computational Harmonic Analysis 2 (6), 252–281 (1998).
- [2] V.F. Kroupa (ed.) Direct Digital Frequency Synthesizers, IEEE Press, 1999.
- [3] J. Vankka, Direct Digital Synthesizers: Theory, Design and Applications, PhD Thesis, Helsinki Univ. of Technology, 2000.
- [4] E. Hermanowicz, M. Rojewski, and E. Blok, “A memoryless direct digital synthesizer based on Taylor series approach”, Proc. of III National Conference on Electronics I, 303–308 (2004).
- [5] E. Hermanowicz, M. Rojewski, G.D. Cain, and A. Tarczynski, “On an instantaneous frequency estimator with FIR filters having maximally flat frequency response error magnitude”, Signal Processing 81, 1491–1504 (2001).
- [6] S.L. Hahn, Hilbert Transforms in Signal Processing, Artech House, 1996.
- [7] D. Vakman, Signals, Oscillations and Waves. A Modern Approach, Artech House, 1998.
- [8] L. Cohen, Time-frequency Analysis, Prentice Hall, 1995.
- [9] J. H. Justice, “Analytical signal processing in music computation”, IEEE Trans. 6 (27), 670–684 (1979).
- [10] S. Wardle, “A Hilbert transformer frequency shifter for audio”, FirstWorkshop on Digital Audio Effects DAFx, Barcelona, Spain, 1998.
- [11] S. Disch and U. Zolzer, “Modulation and delay line based digital audio effects”, 2ndWorkshop on Digital Audio Effects DAFx, Trondheim, Norway, 1999.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPG5-0016-0036