S5D0127X01 Datasheet, PDF (17/96 Pages) Samsung semiconductor – MULTISTANDARD VIDEO DECODER/SCALER

S5D0127X01 Data Sheet
MULTIMEDIA VIDEO
VS
ODD
1
2
3
4
SCH
Truth Table
FIELD 1
2
3
4
ODD
H
L
H
L
SCH
H
L
L
H
Note:
ODD and SCH are
measured at the trailing
edge of VS.
Figure 8. NTSC Vertical Timing Signals
The PID pin is used to identify whether the current V-axis is inverted in PAL mode. This signal changes at the color
burst. By noting this value at the same line of each field, a determination of whether a field is from {1-4} or {5-8} can
be made. As with the SCH pin, the S5D0127X01 is designed to hold the line 260 PID measurement for the entire
vertical blank period. This allows easy sampling of the PID or current field identification.
The ODD, SCH and PID signals change at different times and more than once within the video fields. Proper data
for field identification is determined by latching all three signals at the trailing edge of VS. Figure 9 shows the VS,
ODD, SCH, and PID signals and their latched values for each of the 8 possible fields. Figure 10 is the line to line
timing diagram for these signals in PAL mode.
VS
ODD
1
2
3
4
5
6
7
8
SCH
PID
Truth Table
FIELD 1
2
ODD
H
L
SCH
H
L
PID
H
L
3
4
5
6
7
8
H
L
H
L
H
L
H
L
L
H
L
L
L
H
H
L
L
H
Note:
ODD, SCH and PID are
measured at the trailing
edge of VS (VALIGN = 0).
Figure 9. PAL Vertical Timing Signals
ELECTRONICS
Modified on May/04/2000
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