Advanced video debanding
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Conference PaperDate:
2014Access:
openAccessCitation:
Gary Baugh, Anil Kokaram, François Pitié, Advanced video debanding, CVMP '14: Proceedings of the 11th European Conference on Visual Media Production, CVMP '14: Proceedings of the 11th European Conference on Visual Media Production, ACM, 2014, a7-Download Item:
Abstract:
High efficiency video coding has made it possible to stream video
over bandwidth constrained communication networks. Depending
on bit rate requirements, a video encoder sacrifices some image de-
tails which can then introduce visual artefacts. Due to aggressive
encoding a contouring staircase artefact called banding can be ob-
served in image regions with very low texture. This paper presents
a solution for removing banding artefacts using image filtering and
dithering techniques. A new banding index (BI) metric is also pre-
sented for quantitatively measuring the amount of banding in an im-
age. Using this BI metric, we assess how much banding YouTube
video encoding introduces in a video test dataset. There is a de-
banding filter in
ffmpeg
called
gradfun
. We compare the results
of our debanding technique with those of
gradfun
on the YouTube
test dataset.
Author's Homepage:
http://people.tcd.ie/akokaramhttp://people.tcd.ie/pitief
Description:
PUBLISHED
Author: PITIE, FRANCOIS; KOKARAM, ANIL
Other Titles:
CVMP '14: Proceedings of the 11th European Conference on Visual Media ProductionCVMP '14: Proceedings of the 11th European Conference on Visual Media Production
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ACMType of material:
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High efficiency video codingMetadata
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