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Improved universal chroma 4:2:2 subsampling for color filter array video coding in HEVC

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Abstract

Considering one color filter array (CFA) video whose CFA pattern can be any sort of ten well-known CFA patterns, prior to compression in High Efficient Video Coding, this paper presents an improved universal chroma 4:2:2 subsampling method for the CFA video. The proposed subsampling method has clear quality improvement merit because for any \(2\,\times \, 2\) YUV block, we take the influence of the U component and V component when converting them to B/G pixels and R/G pixels, respectively, into account when determining the two subsampled U and V chroma values. To further improve the quality, a luma modification strategy is performed after chroma subsampling. Based on four typical test CFA videos, the experimental results demonstrate that the proposed subsampling method outperforms the four related state-of-the-art methods in terms of the objective and subjective quality metrics and the trade-off between the quality and bitrate.

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Authors and Affiliations

  1. Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Taipei, 10672, Taiwan, ROC

    Kuo-Liang Chung & Chien-Hsiung Lin

  2. Department of Computer Science and Information Engineering, Jinwen University of Science and Technology, No. 99, AnChung Road, Hsin-Tien, New Taipei City, 23154, Taiwan, ROC

    Yong-Huai Huang

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  1. Kuo-Liang Chung
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  2. Yong-Huai Huang
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  3. Chien-Hsiung Lin
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Correspondence to Yong-Huai Huang.

Additional information

Kuo-Liang Chung, Chien-Hsiung Lin: Supported by the Ministry of Science and Technology under the contract MOST 104-2221-E-011-004-MY3.

Yong-Huai Huang: Supported by the National Science Council of R. O. C. under the contract MOST 104-2221-E228-006.

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Chung, KL., Huang, YH. & Lin, CH. Improved universal chroma 4:2:2 subsampling for color filter array video coding in HEVC. SIViP 11, 1041–1048 (2017). https://doi.org/10.1007/s11760-017-1055-1

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  • DOI: https://doi.org/10.1007/s11760-017-1055-1

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