Filter banks for less ringing artifacts

Wataru Asano, Tomoaki Takeuchi, Masaaki Ikehara

研究成果: Article

抄録

In image compression using a filter bank, blocking can be reduced by overlapping the basis functions in the lapped orthogonal transform or the lapped biorthogonal transform, whereas ringing can be conspicuous. In this paper, two methods are proposed to suppress ringing while blocking is reduced. One of them uses an unequal length linear phase biorthogonal filter bank. This is an extension of the unequal length orthogonal transform to the biorthogonal type and a generalization of the filter length in the lapped biorthogonal transform. This filter bank can be realized with a lattice structure. By reducing the length of the high-frequency filter on the synthesis side, ringing is compressed to the edge so that it is less visible. Another method introduces the peak-to-peak ratio into the performance criterion of the filter bank design. In this method, ringing can be suppressed by restricting the impulse response of the filter. By means of these methods, ringing can be reduced while coding performance is retained in comparison with the conventional equal length filter banks.

元の言語English
ページ(範囲)1-10
ページ数10
ジャーナルElectronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi)
85
発行部数6
DOI
出版物ステータスPublished - 2002 6

Fingerprint

Filter banks
Image compression
Impulse response

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

これを引用

@article{021e5159188e4301aefa2e56a4d24632,
title = "Filter banks for less ringing artifacts",
abstract = "In image compression using a filter bank, blocking can be reduced by overlapping the basis functions in the lapped orthogonal transform or the lapped biorthogonal transform, whereas ringing can be conspicuous. In this paper, two methods are proposed to suppress ringing while blocking is reduced. One of them uses an unequal length linear phase biorthogonal filter bank. This is an extension of the unequal length orthogonal transform to the biorthogonal type and a generalization of the filter length in the lapped biorthogonal transform. This filter bank can be realized with a lattice structure. By reducing the length of the high-frequency filter on the synthesis side, ringing is compressed to the edge so that it is less visible. Another method introduces the peak-to-peak ratio into the performance criterion of the filter bank design. In this method, ringing can be suppressed by restricting the impulse response of the filter. By means of these methods, ringing can be reduced while coding performance is retained in comparison with the conventional equal length filter banks.",
keywords = "Biorthogonal filter bank, Image processing, Ringing, Unequal length",
author = "Wataru Asano and Tomoaki Takeuchi and Masaaki Ikehara",
year = "2002",
month = "6",
doi = "10.1002/ecjc.1096",
language = "English",
volume = "85",
pages = "1--10",
journal = "Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi)",
issn = "1042-0967",
publisher = "John Wiley and Sons Inc.",
number = "6",

}

TY - JOUR

T1 - Filter banks for less ringing artifacts

AU - Asano, Wataru

AU - Takeuchi, Tomoaki

AU - Ikehara, Masaaki

PY - 2002/6

Y1 - 2002/6

N2 - In image compression using a filter bank, blocking can be reduced by overlapping the basis functions in the lapped orthogonal transform or the lapped biorthogonal transform, whereas ringing can be conspicuous. In this paper, two methods are proposed to suppress ringing while blocking is reduced. One of them uses an unequal length linear phase biorthogonal filter bank. This is an extension of the unequal length orthogonal transform to the biorthogonal type and a generalization of the filter length in the lapped biorthogonal transform. This filter bank can be realized with a lattice structure. By reducing the length of the high-frequency filter on the synthesis side, ringing is compressed to the edge so that it is less visible. Another method introduces the peak-to-peak ratio into the performance criterion of the filter bank design. In this method, ringing can be suppressed by restricting the impulse response of the filter. By means of these methods, ringing can be reduced while coding performance is retained in comparison with the conventional equal length filter banks.

AB - In image compression using a filter bank, blocking can be reduced by overlapping the basis functions in the lapped orthogonal transform or the lapped biorthogonal transform, whereas ringing can be conspicuous. In this paper, two methods are proposed to suppress ringing while blocking is reduced. One of them uses an unequal length linear phase biorthogonal filter bank. This is an extension of the unequal length orthogonal transform to the biorthogonal type and a generalization of the filter length in the lapped biorthogonal transform. This filter bank can be realized with a lattice structure. By reducing the length of the high-frequency filter on the synthesis side, ringing is compressed to the edge so that it is less visible. Another method introduces the peak-to-peak ratio into the performance criterion of the filter bank design. In this method, ringing can be suppressed by restricting the impulse response of the filter. By means of these methods, ringing can be reduced while coding performance is retained in comparison with the conventional equal length filter banks.

KW - Biorthogonal filter bank

KW - Image processing

KW - Ringing

KW - Unequal length

UR - http://www.scopus.com/inward/record.url?scp=0036604850&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036604850&partnerID=8YFLogxK

U2 - 10.1002/ecjc.1096

DO - 10.1002/ecjc.1096

M3 - Article

AN - SCOPUS:0036604850

VL - 85

SP - 1

EP - 10

JO - Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi)

JF - Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi)

SN - 1042-0967

IS - 6

ER -