Texas Instruments TMS320C64x DSP - Manual (Page 85)

BT.656 and Y/C Mode Field and Frame Operation
3-23 Video Capture Port SPRU629
Figure 3–9. HCOUNT Operation Example (EXC = 0)
VDIN[9–0]
80.0 80.0 10.0 FF
.C
00.0 00.0 Cb
0
Y 2
Cb 359 Cr 359 Y 719
Y 0 Cr 0 Y 1 Cb 1
One Line
XY
.0
10.0 80.0 10.0 FF
.C
00.0 00.0 XY
.0
855 856 857 0 1 2 718 719 720 721 722 723 720 721 722 723 HCOUNT
SAV EAV Blanking Data EAV
Active Video Blanking
VCLKIN
Next Line
4 4 268 1440
EXC=0
HRST=0
One Line
133 134 135 136 273 274 854 855 856 857 0 1 856 857 0 1 HCOUNT
Next Line
EXC=0
HRST=1
n n+1 n–1 VCOUNT
Y 718
Figure 3–10. HCOUNT Operation Example (EXC = 1)
n
n
n
140
2
60
n
1440
Active Video
124
Y 2
Blanking Data
1
721
779
843
VCOUNT
VCOUNT
EXC=1
HRST=1
EXC=1
HRST=0
HCOUNT 720
HCOUNT
VCOUNT
0
AVID
EXC=1
HRST=0
EXC=1
HRST=1
HCOUNT 842
HCOUNT
VCOUNT
778
HSYNC
79
799
857
63
n–1
15
735 722
2
736
n–1
16
793
857 844
780
n–1
0
794
136
856 855 800
80 135
857 1 0
138 137 139
56
120 119 64
0 55
121 123 122
58 57 59
Blanking
80.0
VCLKIN
VDIN[9–0]
80.0 10.0 10.0 80.0 80.0 10.0 10.0 10.0 80.0 80.0 10.0 10.0 80.0 10.0 80.0 Y 0 10.0 80.0 Cb 0 Cb 1
Y 1 Cr 0
n+1
1
721
779
843
720 719 718
857 856 0
842 842 840
777 776 778
722
2
844
780
10.0 Cb 0 80.0 Y 719 Cr 359 Y 718 10.0 80.0 10.0 80.0
276