An Improved SAO Scheme for Screen Content Coding

Mengmeng ZHANG; Chuan ZHOU; Jizheng XU

doi:10.1587/transfun.E99.A.1499

An Improved SAO Scheme for Screen Content Coding

Mengmeng ZHANG, Chuan ZHOU, Jizheng XU

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The High efficiency video coding (HEVC) standard defines two in-loop filters to improve the objective and subjective quality of the reconstructed frames. Through analyzing the effectiveness of the in-loop filters, it is noted that band offset (BO) process achieves much more coding gains for text region which mostly employ intra block copy (IntraBC) prediction mode. The intraBC prediction process in HEVC is performed by using the already reconstructed region for block matching, which is similar to motion compensation. If BO process is applied after one coding tree unit (CTU) encoded, the distortion between original and reconstructed samples copied by the IntraBC prediction will be further reduced, which is simple to operate and can obtain good coding efficiency. Experimental results show that the proposed scheme achieves up to 3.4% BD-rate reduction in All-intra (AI) for screen content sequences with encoding and decoding time no increase.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E99-A No.7 pp.1499-1502

Publication Date: 2016/07/01

Publicized

Online ISSN: 1745-1337

DOI: 10.1587/transfun.E99.A.1499

Type of Manuscript: LETTER

Category: Image

Authors

Mengmeng ZHANG
  the North China University of Technology
Chuan ZHOU
  the North China University of Technology
Jizheng XU
  Microsoft Research Asia

Keyword

high efficiency video coding (HEVC), sample adaptive offset, deblocking filter, screen content coding

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Mengmeng ZHANG, Chuan ZHOU, Jizheng XU, "An Improved SAO Scheme for Screen Content Coding" in IEICE TRANSACTIONS on Fundamentals, vol. E99-A, no. 7, pp. 1499-1502, July 2016, doi: 10.1587/transfun.E99.A.1499.
Abstract: The High efficiency video coding (HEVC) standard defines two in-loop filters to improve the objective and subjective quality of the reconstructed frames. Through analyzing the effectiveness of the in-loop filters, it is noted that band offset (BO) process achieves much more coding gains for text region which mostly employ intra block copy (IntraBC) prediction mode. The intraBC prediction process in HEVC is performed by using the already reconstructed region for block matching, which is similar to motion compensation. If BO process is applied after one coding tree unit (CTU) encoded, the distortion between original and reconstructed samples copied by the IntraBC prediction will be further reduced, which is simple to operate and can obtain good coding efficiency. Experimental results show that the proposed scheme achieves up to 3.4% BD-rate reduction in All-intra (AI) for screen content sequences with encoding and decoding time no increase.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/transfun.E99.A.1499/_p

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@ARTICLE{e99-a_7_1499,
author={Mengmeng ZHANG, Chuan ZHOU, Jizheng XU, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={An Improved SAO Scheme for Screen Content Coding},
year={2016},
volume={E99-A},
number={7},
pages={1499-1502},
abstract={The High efficiency video coding (HEVC) standard defines two in-loop filters to improve the objective and subjective quality of the reconstructed frames. Through analyzing the effectiveness of the in-loop filters, it is noted that band offset (BO) process achieves much more coding gains for text region which mostly employ intra block copy (IntraBC) prediction mode. The intraBC prediction process in HEVC is performed by using the already reconstructed region for block matching, which is similar to motion compensation. If BO process is applied after one coding tree unit (CTU) encoded, the distortion between original and reconstructed samples copied by the IntraBC prediction will be further reduced, which is simple to operate and can obtain good coding efficiency. Experimental results show that the proposed scheme achieves up to 3.4% BD-rate reduction in All-intra (AI) for screen content sequences with encoding and decoding time no increase.},
keywords={},
doi={10.1587/transfun.E99.A.1499},
ISSN={1745-1337},
month={July},}

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TY - JOUR
TI - An Improved SAO Scheme for Screen Content Coding
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1499
EP - 1502
AU - Mengmeng ZHANG
AU - Chuan ZHOU
AU - Jizheng XU
PY - 2016
DO - 10.1587/transfun.E99.A.1499
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E99-A
IS - 7
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - July 2016
AB - The High efficiency video coding (HEVC) standard defines two in-loop filters to improve the objective and subjective quality of the reconstructed frames. Through analyzing the effectiveness of the in-loop filters, it is noted that band offset (BO) process achieves much more coding gains for text region which mostly employ intra block copy (IntraBC) prediction mode. The intraBC prediction process in HEVC is performed by using the already reconstructed region for block matching, which is similar to motion compensation. If BO process is applied after one coding tree unit (CTU) encoded, the distortion between original and reconstructed samples copied by the IntraBC prediction will be further reduced, which is simple to operate and can obtain good coding efficiency. Experimental results show that the proposed scheme achieves up to 3.4% BD-rate reduction in All-intra (AI) for screen content sequences with encoding and decoding time no increase.
ER -