GDC21D401B Datasheet, PDF (19/28 Pages) Hynix Semiconductor – Video Decoder

5.14 Video Data Output Format
Video decoder transmits decoded macroblock data
to the VDP via 32-bit bus. This bus consists of 4
adjacent pixel components. For a macroblock data,
the number of 32-bit data is 96. The order of
output data is the same of decoded block in the
MPEG-2 Video bitstream syntax. For this reason,
output sequence depends on the DCT_TYPE of
decoded macroblock. Except for the macroblock
GDC21D401B
whose parameter is Frame picture and Field DCT,
all macroblock outputs have the sequence of below
figure(MBFI=0) in Fig 8. The top field data of the
macroblock whose DCT_TYPE is field
type(MBFI=1) is transmitted before the
macroblock bottom field data for the luminance
data. But the chrominance data has always the
same sequence.
0
1
16
17
2
3
18
19
4
5
20
21
6
7
22
23
8
9
24
25
10
11
26
27
12
13
28
29
14
15
30
31
32
33
48
49
34
35
50
51
36
37
52
53
38
39
54
55
40
41
56
57
42
43
58
59
44
45
60
61
46
47
62
63
MBFI == 0
0
1
16
17
32
33
48
49
2
3
18
19
34
35
50
51
4
5
20
21
36
37
52
53
6
7
22
23
38
39
54
55
8
9
24
25
40
41
56
57
10
11
26
27
42
43
58
59
12
13
28
29
44
45
60
61
14
15
30
31
46
47
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
MBFI == 1
Figure 8. The Sequence of Macroblock Output
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