Efficient postprocessor for blocky effect removal based on transform characteristics

Author

Hsia, Shih-Chang ; Yang, Jar-Ferr ; Liu, Bin-Da

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

7

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

924

Lastpage

929

Abstract

In this paper, we propose transform-domain algorithms to effectively classify the characteristics of blocks and estimate the strength of the blocky effect. The transform-domain algorithms require much lower computational complexity and much less memory than the spatial ones. Along with the estimated blocky strength, we also propose an adaptive finite impulse response (FIR) filter to effectively remove the blocky effect. Simulation results show that the proposed algorithms sharply preserve the edge information and greatly improve the decoded image quality

Keywords

FIR filters; adaptive codes; adaptive filters; computational complexity; data compression; discrete cosine transforms; estimation theory; transform coding; video coding; DCT; FIR filter; adaptive finite impulse response filter; blocky effect removal; computational complexity; decoded image quality; edge information; efficient postprocessor; simulation; strength estimation; transform characteristics; transform coding; transform-domain algorithms; video signal processing; Adaptive filters; Computational complexity; Decoding; Discrete cosine transforms; Finite impulse response filter; Frequency; Image quality; Iterative algorithms; Signal processing algorithms; Transform coding;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/76.644073

Filename

644073