Samsung S5PC110 Manual page 1580

S5PC110_UM
If the calculated vertical position is 10.45, for example, pixels of 9th, 10th, 11th, and 12th lines are used for poly-
phase filtering and the pixel phase is 7/16, which means the filter coefficients are vp_poly4_y0_ph7,
vp_poly4_y1_ph7, vp_poly4_y2_ph7, and vp_poly4_y3_ph7.
8-tap luminance horizontal poly-phase filter and 4-tap chrominance horizontal poly-phase filter use the exact same
scheme.
At the boundaries of pictures (top, bottom, left, and right), some pixels in filter window are not available. In this
case, value of the nearest pixel is repeated as shown in
a
a
1 Line
st
b
2 Line
nd
c
3 Line
rd
d
4 Line
th
e
Figure 8-10 Pixel Repetition at Picture Boundary
Figure 8-10.
8 7BVIDEO PROCESSOR
8-46