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This work presents an efficient low-complexity method to compute a 2-D inverse transform flexibly adapted to its end-of-block (EOB) point and corner coefficients. First, the EOB point is obtained from a bitstream or derived from the other parameters. Second, the values of bottom-left and/or top-right corner coefficients before an EOB point are verified as zero or not. Third, the operational mode,...
In H.264/AVC, multiple reference frames are adopted to enhance inter-predictive coding efficiency of motion estimation/compensation. However, memory cost is also increased with the number of used reference frames. This work presents a size-controllable memory reduction method to accommodate multiple reference frames at a limited memory size. This scheme is to store some of Macro-Blocks (MBs) as compressed...
This work develops an efficiently low-complexity method to compute a 2-dimensional inverse integer transform in H.264/AVC. First, the end-of-block points in 4 × 4 and 8 × 8 blocks are computed and then used to select one of 7 and 15 operation modes for each block, respectively. Second, the computation order of row-after-column and column-after-row used for 1-dimensional inverse integer transforms...
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