| 摘要 |
A method of intra mode prediction uses a block of pixels and their horizontal Hpos and vertical Vpos pixel positions and adjacent horizontal and vertical pixels within an input picture frame signal as inputs for a method for selecting a lowest Sum of Absolute Transformed Differences (SATD) intra mode among intra modes among the horizontal, vertical, and steady state (DC) intra modes for use in advanced video coding algorithms, such as MPEG-4 Part 10 and H.264/AVC. Associated costs are calculated for each of the intra modes are used to select the output of the best intra mode. The method reduces the unimproved computational cost of three 2D 4×4 Hadamard transformations (which is equivalent to 24 1D 4 point transformations) to just 4 1D 4 point transformations for a significant computational improvement. As horizontal and vertical panning is frequently used in video imagery, this improvement may reduce encoder processing by 80%.
|
