| 摘要 |
Chroma upsampling is performed by setting a chroma of a target pixel according to luma of neighboring pixels. When a luma of the target pixel differs from the luma of both of the reference pixels, the chroma of the target pixel is set to a value of (k*C 1+ (m-k)*C 3+ m/2) shifted n bits to the right. In this formula, n is an integer, m is equal to 2<SUP>n</SUP>, and k is equal to {0~m, min(abs(abs(Y 1- Y 2 )*k-abs(Y 2 -Y 3 )*(m-k)))}. Since luma are considered, and a precise calculation is used in this method, the calculations required are simplified and reduced, and video quality is improved.
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