Video specification form 71
Vertical timings
For interlaced video sources, vertical timings can be expressed as the number of
lines per frame or number of lines per field. For non-interlaced video sources, they
should be expressed as the number of lines per frame. Note that horizontal
synchronizations are not shown in the diagram below.
RY line 1
line 2
line n
A 5 B C
D
E
IN 0 A
IM 20 A. Vertical total line time
B. Vertical synchronization pulse
L Y width
C. Vertical back porch
E A D. Vertical total active time
PR19 M E.Verticalfrontporch
Horizontal synchronization
pulses/field (interlaced only)
______ lines
______ lines
Horizontal synchronization
pulses/frame
(interlaced & non-interlaced)
______ lines
______ lines
______ lines
______ lines
______ lines
______ lines
______ lines
______ lines
    "