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The directional intra prediction (IP) in H.264/AVC and HEVC tends to cause the residue to be anisotropic. To transform the IP residue, Mode Dependent Directional Transform (MDDT) based on Karhunen Loève transform (KLT) can achieve better energy compaction than DCT, with one transform assigned to each prediction mode. However, due to the data variation, different residue blocks with the same IP mode...
The Discrete Cosine Transform is statistically optimal for first order Markov signals, which is widely used in image and video coding. However, in the intra frame coding of H.264/AVC, it is known that after directional intra prediction, there is still anisotropic features left in residue signals. And the features are related to the intra prediction modes. In order to represent the corresponding features,...
In this paper, a novel frame-level dependent bit allocation (DBA) method is proposed. Our contribution is two-fold: First, the dependency between adjacent frames is quantitatively measured by the introduced inter-frame dependency model(IFDM). The IFDM not only holds for slow video sequences, but remains valid for video sequences of median and high motion as well. Second, based on the IFDM, the conventional...
Accurate statistical distribution for estimating the transformed residues is greatly important for us to analyze the rate-distortion behavior of video encoders. However, the previous work pays more attention to those sequences of low-resolution. In this paper, we address the statistical characteristics of DCT coefficients of high-definition videos coded by H.264/AVC. The contribution of this paper...
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