Beyond bandlimited sampling of speech spectral envelope imposed by the harmonic structure of voiced sounds

Hideki Kawahara, Masanori Morise, Tomoki Toda, Ryuichi Nisimura, Toshio Irino

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

A new spectral envelope estimation procedure is proposed to recover details beyond band limitation imposed by the Shannon's sampling theory when interpreting periodic excitation of voiced sounds as the sampling operation in the frequency domain. The proposed procedure is a hybrid of STRAIGHT, a F0-adaptive spectral envelope estimation and the auto regressive model parameter estimation. Wavelet analyses of these spectral models on the frequency domain enabled objective evaluation of this recovery procedure. The proposed procedure provides better speech quality especially when parameter manipulation is introduced.

Original languageEnglish
Pages (from-to)34-38
Number of pages5
JournalProceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH
Publication statusPublished - 1 Jan 2013
Event14th Annual Conference of the International Speech Communication Association, INTERSPEECH 2013 - Lyon, France
Duration: 25 Aug 201329 Aug 2013

Keywords

  • Envelope spectrum
  • Sampling theory
  • Speech analysis
  • Speech modification
  • Transfer function

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