Estimation of Mosquito Noise Level from Decoded Picture
Summary :
With DCT coding, block artifact and mosquito noise degradations appear in decoded pictures. The control of post filtering is important to reduce degradations without causing side effects. Decoding information is useful, if the filter is inside or close to the encoder; however, it is difficult to control with independent post filtering, such as in a display. In this case, control requires the estimation of the artifact from only the decoded picture. In this work, we describe an estimation method that determines the mosquito noise block and level. In this method, the ratio of spatial activity is taken between the mosquito block and the neighboring flat block. We test the proposed method using the reconstructed pictures which are coded with different quantization scales. We recognize that the results are mostly reasonable with the different quantizations.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E92-A No.12 pp.3291-3296
- Publication Date
- 2009/12/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E92.A.3291
- Type of Manuscript
- Special Section PAPER (Special Section on Image Media Quality)
- Category
- Evaluation
Authors
Keyword
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Kenji SUGIYAMA, Naoya SAGARA, Yohei KASHIMURA, "Estimation of Mosquito Noise Level from Decoded Picture" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 12, pp. 3291-3296, December 2009, doi: 10.1587/transfun.E92.A.3291.
Abstract: With DCT coding, block artifact and mosquito noise degradations appear in decoded pictures. The control of post filtering is important to reduce degradations without causing side effects. Decoding information is useful, if the filter is inside or close to the encoder; however, it is difficult to control with independent post filtering, such as in a display. In this case, control requires the estimation of the artifact from only the decoded picture. In this work, we describe an estimation method that determines the mosquito noise block and level. In this method, the ratio of spatial activity is taken between the mosquito block and the neighboring flat block. We test the proposed method using the reconstructed pictures which are coded with different quantization scales. We recognize that the results are mostly reasonable with the different quantizations.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.3291/_p
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@ARTICLE{e92-a_12_3291,
author={Kenji SUGIYAMA, Naoya SAGARA, Yohei KASHIMURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Estimation of Mosquito Noise Level from Decoded Picture},
year={2009},
volume={E92-A},
number={12},
pages={3291-3296},
abstract={With DCT coding, block artifact and mosquito noise degradations appear in decoded pictures. The control of post filtering is important to reduce degradations without causing side effects. Decoding information is useful, if the filter is inside or close to the encoder; however, it is difficult to control with independent post filtering, such as in a display. In this case, control requires the estimation of the artifact from only the decoded picture. In this work, we describe an estimation method that determines the mosquito noise block and level. In this method, the ratio of spatial activity is taken between the mosquito block and the neighboring flat block. We test the proposed method using the reconstructed pictures which are coded with different quantization scales. We recognize that the results are mostly reasonable with the different quantizations.},
keywords={},
doi={10.1587/transfun.E92.A.3291},
ISSN={1745-1337},
month={December},}
Copy
TY - JOUR
TI - Estimation of Mosquito Noise Level from Decoded Picture
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 3291
EP - 3296
AU - Kenji SUGIYAMA
AU - Naoya SAGARA
AU - Yohei KASHIMURA
PY - 2009
DO - 10.1587/transfun.E92.A.3291
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 12
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - December 2009
AB - With DCT coding, block artifact and mosquito noise degradations appear in decoded pictures. The control of post filtering is important to reduce degradations without causing side effects. Decoding information is useful, if the filter is inside or close to the encoder; however, it is difficult to control with independent post filtering, such as in a display. In this case, control requires the estimation of the artifact from only the decoded picture. In this work, we describe an estimation method that determines the mosquito noise block and level. In this method, the ratio of spatial activity is taken between the mosquito block and the neighboring flat block. We test the proposed method using the reconstructed pictures which are coded with different quantization scales. We recognize that the results are mostly reasonable with the different quantizations.
ER -
English
