NDLI: Low-complexity post-processing for artifact reduction in block-DCT based video coding

Content Provider	IEEE Xplore Digital Library
Author	Atzori, L. De Natale, F.G.B. Granelli, F.
Copyright Year	2000
Description	Author affiliation: DIEE, Cagliari Univ., Italy (Atzori, L.)
Abstract	Most widespread video coding algorithms (such as MPEG, H.261, H.263) employ DCT coding for data compression but introduce annoying artefacts due mainly to the independent quantization of the coefficients in each block, that are especially visible at medium and low bitrates. Within this framework, post-processing appears to be a practical solution for visual enhancement of compressed video. In this paper, an adaptive anisotropic spatial-variant FIR filtering procedure is proposed. The filter kernels are selected on the basis of a pixel classification procedure that performs a block-DCT coefficients energy analysis and an edge extraction. The analysis of the transform coefficients matrix allows one to extract information about spatial characteristics, while the edge information provide the basis for the estimation of the position of the local visual artifact. Accurate filtering results were obtained during experiments that outperform those obtained with other existing approaches.
Starting Page	668
Ending Page	671
File Size	420245
Page Count	4
File Format	PDF
ISBN	0780362977
ISSN	15224880
DOI	10.1109/ICIP.2000.899797
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-09-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Video coding Finite impulse response filter Filtering Data mining Transform coding Discrete cosine transforms Data compression Quantization Bit rate Video compression
Content Type	Text
Resource Type	Article

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