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In this paper, we propose a spatially adaptive gradient-projection algorithm for the H.264 video coding standard to remove coding artifacts using local statistics. A hybrid method combining a new weighted constrained least squares (WCLS) approach and the projection onto convex sets (POCS) approach is introduced, where weighting components are determined on the basis of the human visual system (HVS) and projection set is defined by the difference between adjacent pixels and the quantization index (QI). A new visual function is defined to determine the weighting matrices controlling the degree of global smoothness, and a projection set is used to obtain a solution satisfying local smoothing constraints, so that the coding artifacts such as blocking and ringing artifacts can be simultaneously removed. The experimental results show the capability and efficiency of the proposed algorithm.

- Publication
- IEICE TRANSACTIONS on Information Vol.E94-D No.5 pp.1073-1081

- Publication Date
- 2011/05/01

- Publicized

- Online ISSN
- 1745-1361

- DOI
- 10.1587/transinf.E94.D.1073

- Type of Manuscript
- PAPER

- Category
- Image Processing and Video Processing

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Kwon-Yul CHOI, Min-Cheol HONG, "A Spatially Adaptive Gradient-Projection Algorithm to Remove Coding Artifacts of H.264" in IEICE TRANSACTIONS on Information,
vol. E94-D, no. 5, pp. 1073-1081, May 2011, doi: 10.1587/transinf.E94.D.1073.

Abstract: In this paper, we propose a spatially adaptive gradient-projection algorithm for the H.264 video coding standard to remove coding artifacts using local statistics. A hybrid method combining a new weighted constrained least squares (WCLS) approach and the projection onto convex sets (POCS) approach is introduced, where weighting components are determined on the basis of the human visual system (HVS) and projection set is defined by the difference between adjacent pixels and the quantization index (QI). A new visual function is defined to determine the weighting matrices controlling the degree of global smoothness, and a projection set is used to obtain a solution satisfying local smoothing constraints, so that the coding artifacts such as blocking and ringing artifacts can be simultaneously removed. The experimental results show the capability and efficiency of the proposed algorithm.

URL: https://global.ieice.org/en_transactions/information/10.1587/transinf.E94.D.1073/_p

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@ARTICLE{e94-d_5_1073,

author={Kwon-Yul CHOI, Min-Cheol HONG, },

journal={IEICE TRANSACTIONS on Information},

title={A Spatially Adaptive Gradient-Projection Algorithm to Remove Coding Artifacts of H.264},

year={2011},

volume={E94-D},

number={5},

pages={1073-1081},

abstract={In this paper, we propose a spatially adaptive gradient-projection algorithm for the H.264 video coding standard to remove coding artifacts using local statistics. A hybrid method combining a new weighted constrained least squares (WCLS) approach and the projection onto convex sets (POCS) approach is introduced, where weighting components are determined on the basis of the human visual system (HVS) and projection set is defined by the difference between adjacent pixels and the quantization index (QI). A new visual function is defined to determine the weighting matrices controlling the degree of global smoothness, and a projection set is used to obtain a solution satisfying local smoothing constraints, so that the coding artifacts such as blocking and ringing artifacts can be simultaneously removed. The experimental results show the capability and efficiency of the proposed algorithm.},

keywords={},

doi={10.1587/transinf.E94.D.1073},

ISSN={1745-1361},

month={May},}

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TY - JOUR

TI - A Spatially Adaptive Gradient-Projection Algorithm to Remove Coding Artifacts of H.264

T2 - IEICE TRANSACTIONS on Information

SP - 1073

EP - 1081

AU - Kwon-Yul CHOI

AU - Min-Cheol HONG

PY - 2011

DO - 10.1587/transinf.E94.D.1073

JO - IEICE TRANSACTIONS on Information

SN - 1745-1361

VL - E94-D

IS - 5

JA - IEICE TRANSACTIONS on Information

Y1 - May 2011

AB - In this paper, we propose a spatially adaptive gradient-projection algorithm for the H.264 video coding standard to remove coding artifacts using local statistics. A hybrid method combining a new weighted constrained least squares (WCLS) approach and the projection onto convex sets (POCS) approach is introduced, where weighting components are determined on the basis of the human visual system (HVS) and projection set is defined by the difference between adjacent pixels and the quantization index (QI). A new visual function is defined to determine the weighting matrices controlling the degree of global smoothness, and a projection set is used to obtain a solution satisfying local smoothing constraints, so that the coding artifacts such as blocking and ringing artifacts can be simultaneously removed. The experimental results show the capability and efficiency of the proposed algorithm.

ER -