An adaptive short-term postfilter based on pseudo-cepstral representation of line spectral frequencies

Hong Kook Kim, Hong Goo Kang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We propose an adaptive short-term postfilter for speech coders by incorporating the properties of the pseudo-cepstrum [IEEE Trans. Speech Audio Process. 8 (2) (2000) 195]. Since the proposed postfilter implicitly has a characteristic of tilt compensation, it does not require an additional tilt compensation filter as conventional techniques. We derive a relationship between the postfilter parameters so that the postfilter has a minimum phase distortion, which helps simplify the tuning procedure for the parameters. We also show that the postfilter can be successfully implemented with a lower order. By applying this postfilter to several international speech coding standards, we reduce the complexity while obtaining a comparable performance to conventional approaches.

Original languageEnglish
Pages (from-to)335-348
Number of pages14
JournalSpeech Communication
Volume37
Issue number3-4
DOIs
Publication statusPublished - 2002 Jul

All Science Journal Classification (ASJC) codes

  • Software
  • Modelling and Simulation
  • Communication
  • Language and Linguistics
  • Linguistics and Language
  • Computer Vision and Pattern Recognition
  • Computer Science Applications

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