A generalized lapped transform with unequal length filters based on first-order linear-phase filter banks

Taichi Yoshida, Yuichi Tanaka, Masaaki Ikehara

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

Abstract

In this paper, we propose design methods for biorthogonal linear-phase filter banks (BOLPFBs) which have unequal length filters in their synthesis banks or in their both (analysis and synthesis) banks based on first-order linear-phase filter banks (FOLPFBs). First, we indicate that the building blocks in FOLPFBs can be used as those in variable-order LPFBs (VOLPFBs). Second, we propose a VOLPFB which have unequal length filters in its synthesis bank (UVLPFB). Long highpass filters of a synthesis bank often generate the ringing artifacts. Ringing artifacts are a main disadvantage in image coding based on FOLPFBs. Since UVLPFBs have long lowpass filters and short highpass filters in their synthesis bank, they can reduce the ringing artifacts as well as approximate smooth regions well.

Original languageEnglish
Title of host publicationConference Record of the 41st Asilomar Conference on Signals, Systems and Computers, ACSSC
Pages1083-1087
Number of pages5
DOIs
Publication statusPublished - 2007 Dec 1
Event41st Asilomar Conference on Signals, Systems and Computers, ACSSC - Pacific Grove, CA, United States
Duration: 2007 Nov 42007 Nov 7

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other41st Asilomar Conference on Signals, Systems and Computers, ACSSC
CountryUnited States
CityPacific Grove, CA
Period07/11/407/11/7

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Keywords

  • Biorthogonal filter banks
  • First-order linear-phase filter banks
  • Image coding
  • Unequal length filter banks

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

Cite this

Yoshida, T., Tanaka, Y., & Ikehara, M. (2007). A generalized lapped transform with unequal length filters based on first-order linear-phase filter banks. In Conference Record of the 41st Asilomar Conference on Signals, Systems and Computers, ACSSC (pp. 1083-1087). [4487389] (Conference Record - Asilomar Conference on Signals, Systems and Computers). https://doi.org/10.1109/ACSSC.2007.4487389