Datasheet

980
SAM9G15 [DATASHEET]
11052D–ATARM–31-Oct-12
Figure 44-5. 4:2:0 Upsampling Algorithm
Y sample
Cr Cb calculated at encoding time
Cr Cb interpolated from 2 Chroma Component
Cr Cb interpolated from 4 Chroma Component
Vertical and Horizontal upsampling 4:2:0 to 4:4:4 conversion
C[0,0]
C[x/2,0] C[x,0]
C[0,y/2]
C[x/2,y/2]
C[x,y/2]
C[0,y]
C[x/2,y]
C[x,y]
Chroma
x
2
---
0,
Cr 00,[]Cr 0 x,[]+
2
------------------------------------------------=
Chroma 0
y
2
---
,
Cr 00,[]C 0 y,[]+
2
--------------------------------------------- -=
Chroma
x
2
---
y
2
---
,
Cr 00,[]Cr x 0,[]Cr y 0,[]Cr x y,[]+++
4
------------------------------------------------------------------------------------------------------=
Chroma x
y
2
---
,
Cr x 0,[]Cr x y,[]+
2
-----------------------------------------------=
Chroma
x
2
---
y,
Cr 0 y,[]Cr x y,[]+
2
-----------------------------------------------=