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In this paper, a novel Saliency-JND (S-JND) model has been proposed which combines the visual attention model and the visual sensitivity model together. The visual attention model can discover the saliency region where our eyes focus when viewing a video. The visual sensitivity model can define a threshold for unperceived distortions. More perceptual redundancy can be removed by using visual saliency...
H.265/HEVC aims to provide significant improvement of compression performance compared with previous coding standards at cost of significant computation complexity. In this paper, an adaptive CU mode decision mechanism (ACMD) based on Bayesian decision theory is proposed to accelerate mode selection procedure. Specifically, the homogeneous determination is firstly utilized to filter out non-split...
High Efficiency Video Coding (HEVC) is the latest video coding standard. It aims to provide significant improvement of compression performance with considerable increment of computational complexity, compared with all exiting video coding standards. In this paper, we propose an adaptive CU depth selection mechanism (ACDSM) for inter mode decision. To avoid unnecessary CU partition by rate distortion...
In this paper, we propose a novel frame-level rate control algorithm for videos with complex scene in High Efficiency Video Coding(HEVC). To achieve a constant bitrate output and reduce the mismatch ratio of bitrate for time varying wireless links, the relationship of content complexity, QP and bitrate is utilized to adjust bit allocation for each GOP and frame via linear extrapolation. In addition,...
Rate-distortion optimization is widely used in modern video codecs to make various encoder decisions in order to optimize the trade-off between bit-rate and quality. The distortion models used in HEVC are mean squared error (MSE) and sum of absolute difference (SAD), both of which are not always reflective of perceptual quality. In this paper, we show that SSIM, which has been found to be a good indicator...
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