A channel vocoder using wavelet packets on a reconfigurable device

Cesar Daniel Salvador Castaneda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A channel vocoder using wavelet packets for computer music applications is proposed. The input audio signals are a modulating voice and a carrier melody. The wavelet packets channel vocoder transforms windowed frames of both signals to a subband domain, mixes the melody with the voice envelope, and transforms back the result to the original domain. Design is performed with Matlab/Simulink tools and real time implementations with Pure Data and Virtex II Pro FPGA board. Appropriate choices of frame length, wavelets, decomposition levels and envelope detector filter are proposed to achieve good quality sound effects. Finally, guidelines to improve transmission and compression rates in a future work are suggested.

Original languageEnglish
Title of host publicationAudio Engineering Society - 124th Audio Engineering Society Convention 2008
Pages966-974
Number of pages9
Volume2
Publication statusPublished - 2008 Dec 1
Externally publishedYes
Event124th Audio Engineering Society Convention 2008 - Amsterdam, Netherlands
Duration: 2008 May 172008 May 20

Other

Other124th Audio Engineering Society Convention 2008
CountryNetherlands
CityAmsterdam
Period08/5/1708/5/20

ASJC Scopus subject areas

  • Modelling and Simulation
  • Acoustics and Ultrasonics

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