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A real-time visual postprocessor for MPEG-coded video sequences

✍ Scribed by L Atzori; F.G.B De Natale; F Granelli

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
255 KB
Volume
16
Category
Article
ISSN
0923-5965

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✦ Synopsis

A novel content-adaptive enhancement "lter is described, which aims at reducing compression artifacts in MPEGcoded video streams. The "lter locally selects the most appropriate kernel among a set of pre-de"ned masks, based upon a classi"cation of the pixels to be processed. The features used in the classi"cation phase take into account the distribution of transform coe$cients and the presence of nearby contour pixels, previously detected by an edge extractor. An important aspect of the proposed approach is the low computational complexity, very appealing in the scenario of a typical low-cost consumer application (video communication over the Internet, set-top-box DVB receiver, etc.). Experimental results show that the proposed algorithm outperforms existing approaches with similar level of complexity.

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