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This paper proposes a DC coefficient estimation algorithm for intra-predicted residual blocks in the High Efficiency Video Coding (HEVC) standard. Discarding the DC coefficient in the current coding block leads to a substantial bit-saving but produces at the same time strong discontinuities between this block and its neighboring reconstructed blocks. To overcome this problem, we propose an estimation...
This paper presents a new block-based coding method for HEVC intra coding. Pixels in each prediction block are divided into two parts: half pixels are coded by a smart padding technique together with a constrained quantization algorithm; whereas the other half are reconstructed by simple linear interpolations along the prediction direction utilizing the neighboring reference pixels and the first half...
Traditionally, any 2D transform (such as 2D DCT) is implemented through two separable 1D transforms along the vertical and horizontal dimensions. Such a framework is however not most suitable for a 2D directional source in which the dominant directional information is neither horizontal nor vertical. In this letter, we attempt to determine the R-D performance upper bound for block-based transform...
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