Digital Signal Processing Reference
In-Depth Information
Y1
Y1
Y0
Y0
Y1
Y1
Cb
Cb
Cr
Cr
Y2
Y2
Y3
Y3
Fig. 7.21.
Macroblock Structure with 4:2:0
173
6
0
0
-1
0
2
0
- 2
0
0
0
0
0
0
- 1
0
0
0
0
0
0
0
0
0
0
0
0
0
- 1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
QFS(v,u)
Fig. 7.22.
Zig-zag scanning
In the case of I frames, all macroblocks are coded in the manner de-
scribed above. In the case of P and B frames, however, the pixel differ-
ences are transform coded from macroblock in one frame to macroblock in
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