Journal
IET IMAGE PROCESSING
Volume 17, Issue 2, Pages 439-449Publisher
WILEY
DOI: 10.1049/ipr2.12644
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This paper proposes an in-loop filtering algorithm based on a dynamic convolutional capsule network, which adapt well to local features and improves the efficiency of video coding, and shows outstanding performance in terms of time efficiency.
Recently, several in-loop filtering algorithms based on convolutional neural network (CNN) have been proposed to improve the efficiency of HEVC (High Efficiency Video Coding). Conventional CNN-based filters only apply a single model to the whole image, which cannot adapt well to all local features from the image. To solve this problem, an in-loop filtering algorithm based on a dynamic convolutional capsule network (DCC-net) is proposed, which embeds localized dynamic routing and dynamic segmentation algorithms into capsule network, and integrate them into the HEVC hybrid video coding framework as a new in-loop filter. The proposed method brings average 7.9% and 5.9% BD-BR reductions under all intra (AI) and random access (RA) configurations, respectively, as well as, 0.4 dB and 0.2 dB BD-PSNR gains, respectively. In addition, the proposed algorithm has an outstanding performance in terms of time efficiency.
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