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Adaptive loop filter (ALF) is a newly introduced technique in high efficiency video coding (HEVC) that minimizes the distortion between the original frame and the coded frame. While ALF improves a coding efficiency as well as a visual quality in the video coding standard, the use of ALF increases the computational complexity at the decoder side substantially (e.g., 25 percent). This should be overcome...
In this paper, we propose a coding unit (CU) depth-based adaptive loop filter (ALF) decision method to reduce the encoder complexity. In high efficiency video coding (HEVC), ALF is designed based on Wiener filter to minimize the distortion between the original frame and the coded frame. In order to design the optimal filter for each CU, the filter design process is repeated 12 times per CU. The repetition...
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