Abstract
The newest video coding standard--high efficiency video coding (HEVC) optimizes its coding efficiency in terms of sum of square error (SSE), which does not fully consider the perceptual characteristic of the input video. Thus, the HEVC is not effective in the sense of perceptual video coding. To address this problem, an efficient perceptual sensitivity-based rate control (PSRC) method for HEVC is proposed based on the human visual system (HVS) observation that the region with less perceptual sensitivity can tolerate more distortion. In the first stage, the proposed method develops a perceptual sensitivity measurement to evaluate the perceptual sensitivity of each coding tree unit (CTU) and each frame, which is then used to guide the bit allocation so that more bits will be allocated to those regions with higher perceptual sensitivity. To meet the target bits, an improved R-λ model is utilized to determine the quantization parameter (QP). Experimental results have shown that the proposed method is able to improve the perceptual coding performance, compared with the original rate control in HEVC.
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Acknowledgments
This work was supported in part by a grant from the Research Grants Council of the Hong Kong SAR, China (Project CUHK 415712), in part by the National Natural Science Foundation of China under the Grants 61372107 and 61401167, in part by the Xiamen Key Science and Technology Project Foundation under the Grant 3502Z20133024, in part by the Opening Project of State Key Laboratory of Digital Publishing Technology under the grant FZDP2015-B-001, and in part by the High-Level Talent Project Foundation of Huaqiao University under the Grants 14BS201 and 14BS204.
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Zeng, H., Yang, A., Ngan, K.N. et al. Perceptual sensitivity-based rate control method for high efficiency video coding. Multimed Tools Appl 75, 10383–10396 (2016). https://doi.org/10.1007/s11042-015-2997-3
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DOI: https://doi.org/10.1007/s11042-015-2997-3