BULLETIN of the

POLISH ACADEMY of SCIENCES

TECHNICAL SCIENCES

BULLETIN of the POLISH ACADEMY of SCIENCES: TECHNICAL SCIENCES
Volume 54, Issue 4, December 2006

Civil Engineering and Electronics

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pp 499 - 504

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Pitch shifter based on complex dynamic representation rescaling and direct digital synthesis

E. HERMANOWICZ and M. ROJEWSKI
In this paper a new pitch shifter using a complex instantaneous frequency rescaler and direct digital synthesizer is presented aimed at an application in a handset calling signal composer. The pitch shifter introduced here exhibits an excellent performance as a generator 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.
  
Key words: 

pitch shifter, complex instantaneous frequency, direct digital synthesis


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