HDMI 1.4/2.0 TX Subsystem
43
PG235 October 4, 2017
Chapter
3:
Designing with the Subsystem
• When
Native Interface
is selected, the native video stream must be prepared and fed
to the
Video_In
port of the HDMI 1.4/2.0 Transmitter Subsystem, which is directly
connected to the HDMI TX core inside the HDMI 1.4/2.0 Transmitter Subsystem.
The HDMI 1.4/2.0 Transmitter Subsystem is designed to support both progressive and
interlaced video. This section, the focus is to show how to handle interlaced video as it is
more straightforward for progressive video.
Taking 1920x1080@50Hz (I) as an example, the detail timing information is shown in
For interlaced video, each frame consists two fields. One field carries the odd lines and the
other field carries the even lines. After putting both fields together, you get the complete
frame. Therefore,
• Vertical Active per Field = Vertical Active Lines / 2
• Frame Rate = Field Rate / 2.
In this example,
Table
3
‐
2:
Timing Data
Name
Timing Field Subset
Value
HActive
1920
HBlank
720
HFrontPorch
528
HSyncWidth
44
HBackPorch
148
HTotal
2640
VActive
540
F0VBlank
22
F0PVFrontPorch
2
F0PVSyncWidth
5
F0PVBackPorch
15
F0PVTotal
562
F1VBlank
23
F1VFrontPorch
3
F1VSyncWidth
5
F1VBackPorch
15
F1VTotal
563