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Optimal decoder for block-transform based video coders

delete2003-06-01
delete1
PRE
AI
J
Joël Jung
M
Marc Antonini
M
M. Barlaud
DOI：10.1109/TMM.2003.811616delete
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Abstract

Abstract

En 中文
In this paper, we introduce a new decoding algorithm for DCT-based video encoders, such as Motion JPEG (M-JPEG), H26x, or MPEG. This algorithm considers not only the compression artifacts but also the ones due to transmission, acquisition or storage of the video. The novelty of our approach is to jointly tackle these two problems, using a variational approach. The resulting decoder is object-based, allowing independent and adaptive processing of objects and backgrounds, and considers available information provided by the bitstream, such as quantization steps, and motion vectors. Several experiments demonstrate the efficiency of the proposed method. Objective and subjective quality assessment methods are used to evaluate the improvement upon standard algorithms, such as the deblocking and deringing filters included in MPEG-4 postprocessing.
Keywords:
blocking effect
cell loss
dropout
M-JPEG
MPEG
object-based decoding
optimization
variational approach
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Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.

Journal

IEEE Transactions on Multimedia cover
IEEE Transactions on Multimedia
IF:
9.7
Papers:
4.5K
Citations:
2.4W

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