Discrete lattice wavelet transform

Juuso Olkkonen, H. Olkkonen

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

The discrete wavelet transform (DWT) has gained a wide acceptance in denoising and compression coding of images and signals.
In this work we introduce a discrete lattice wavelet transform (DLWT). In the analysis part, the lattice structure contains two parallel transmission channels, which exchange information via two crossed lattice filters. For the synthesis part we show that the similar lattice structure yields a perfect reconstruction (PR) property.
The PR condition can be used to design half-band filters, which effectively eliminate aliasing in decimated tree structured wavelet transform.
The DLWT can be implemented directly to any of the existing DWT algorithms
Original languageEnglish
Pages (from-to)71-75
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume54
Issue number1
DOIs
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed

Keywords

  • FIR filters
  • data compression
  • discrete wavelet transforms
  • filtering theory
  • image coding
  • lattice filters
  • QMF
  • finite-impulse response filters
  • image denoising
  • lattice structure
  • parallel transmission channels
  • perfect reconstruction property
  • quadrature mirror filters
  • signal denoising

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