ADVANCE INFORMATION
VPC 323xD, VPC 324xD
– Both the length and the number of active video lines
varies with the selected window parameters. For
compliance with the ITU-R656 recommendation, a
size of 720 samples per line must be selected for
each window.
Table 2–6: Coding of the SAV/EAV-header
Bit No.
Word
MSB
LSB
– During blanked video lines SAV/EAV headers are
suppressed in pairs. To assure vertical sync detec-
tion the V-flag in the EAV header of the last active
video line is set to 1. Additionally, during field blank-
ing all SAV/EAV headers (with the V-flag set to 1)
are inserted.
7
1
0
0
T
6
1
0
0
F
5
1
0
0
V
4
1
3
1
2
1
1
1
0
1
First
Second
Third
0
0
0
0
0
0
0
0
0
0
Fourth
H
P3
P2
P1
P0
F = 0 during field 1,
F = 1 during field 2
V = 0 during active lines V = 1 during vertical field blanking
H = 0 in SAV,
H = 1 in EAV
T = 1 (video task only)
The bits P0, P1, P2, and P3 are Hamming-coded pro-
tection bits.
dependent on window size
1728 samples
Digital
Video
Output
C
Y C Y ...
R
C
Y C Y ...
R
B
B
constant during
SAV: ”start of active video” header
EAV: ”end of active video” header
horizontal blanking
Y=10
; C =C =80
R B hex
hex
AVO
Fig. 2–14: Output of video data with embedded reference headers (@27 MHz)
10h
Y DATA
EAV
80h
EAV
EAV
3
SAV
EAV
1
80h
10h
SAV
SAV
C
Y
C
Y
C
Y
C
Y
n
SAV
4
2
1
2
3
4
B1
1
R1
2
Bn-1
n-1
Rn-1
AVO
LLC1
LLC2
Fig. 2–15: Detailed data output (double-clock on)
Micronas
19
MICRONAS [ MICRONAS ]
