User guide

11–8 Chapter 11: Clocked Video Output MegaCore Function
Functional Description
Video and Image Processing Suite January 2013 Altera Corporation
User Guide
Table 11–3 lists how Figure 11–4 relates to the register map.
Table 11–3. Interlaced Frame Parameter Descriptions
Register Name Parameter Description
ModeN Control N/A
The zeroth bit of this register is the Interlaced bit:
■ Set to 0 for interlaced.
■ Bit 1 of this register is the sequential output control bit (only if the Allow
output of color planes in sequence compile-time parameter is enabled).
■ Setting bit 1 to 1, enables sequential output from the Clocked Video
Output, such as for NTSC. Setting bit 1 to a 0, enables parallel output
from the Clocked Video Output, such as for 1080p.
ModeN Sample Count Active samples The width of the active picture region in samples/pixels.
ModeN F0 Line Count F0 active lines The height of the active picture region for field F0 in lines.
ModeN F1 Line Count F1 active lines The height of the active picture region for field F1 in lines.
ModeN Horizontal Front
Porch
H front porch
(Separate synchronization mode only.) The front porch of the horizontal
synchronization (the low period before the synchronization starts).
ModeN Horizontal Sync
Length
H sync
(Separate synchronization mode only.) The synchronization length of the
horizontal synchronization (the high period of the sync).
ModeN Horizontal
Blanking
H blanking The horizontal blanking period (non active picture portion of a line).
ModeN Vertical Front
Porch
V front porch
(Separate synchronization mode only.) The front porch of the vertical
synchronization (the low period before the synchronization starts) for field
F1.
ModeN Vertical Sync
Length
V sync
(Separate synchronization mode only.) The synchronization length of the
vertical synchronization (the high period of the sync) for field F1.
ModeN Vertical Blanking V blanking
The vertical blanking period (non active picture portion of a frame) for field
F1.
ModeNF0 Vertical Front
Porch
F0 V front porch
(Separate synchronization mode only.) The front porch of the vertical
synchronization (the low period before the synchronization starts) for field
F0.
ModeN F0 Vertical Sync
Length
F0 V sync
(Separate synchronization mode only.) The synchronization length of the
vertical synchronization (the high period of the sync) for field F0.
ModeN F0 Vertical
Blanking
F0 V blank
The vertical blanking period (non active picture portion of a frame) for field
F0.
ModeN Active Picture
Line
active picture line
The line number that the active picture starts on. For non SDI output this
can be left at 0.
ModeN F0 Vertical Rising
F0 V rising edge
line
The line number that the vertical blanking period for field F0 begins on.
ModeN Field Rising F rising edge line The line number that field F1 begins on.
ModeN Field Falling F falling edge line The line number that field F0 begins on.
ModeN Valid N/A Set to enable the mode after the configuration is complete.
ModeN Ancillary Line Ancillary line
(Embedded synchronization mode only.) The line to start inserting ancillary
packets.
ModeN F0 Ancillary Line F0 ancillary line
(Embedded synchronization mode only.) The line in field F0 to start
inserting ancillary packets.