Lumagen VisionDVI & VisionHDP - Manual (Page 26)

VisionHDP ™
User Manual and Installer Guide
© 2004-2007 Lumagen®, Inc. 23 Rev 1.14
Flip Input Field
Some source devices do not follow conventions for the order of video fields. This can be seen as
excessive combing in the video. While it’s generally not required, this command allows the input
fields to be swapped so that the images can be properly deinterlaced. The command format is:
MENU → IN → CONFIG → CNTRL → DEINT → FIELD → (NORM, FLIP) OK
Genlock
Genlock is the ability to exactly lock the output rate to the input rate, or to a multiple of the input
rate.
For a typical system with an NTSC source (nominally 59.94 Hz) and outputting a 59.94 Hz rate to
the display, the clocks of the NTSC source and the Lumagen will never match exactly. Because of
this very slight mismatch, there will be a dropped (or doubled) frame once every few minutes.
When genlock is enabled, the Lumagen output clock is varied slightly to keep its output rate
locked to the input rate. This avoids any dropped/doubled frames. This may not be observable by
most users, but genlock corrects this issue for users who are sensitive to it. Another benefit of
using genlock is that it slightly reduces the video delay (aka lip-sync delay) going through the
video processor. It also makes the delay constant through the Lumagen. When genlock is off, the
delay varies over time by about one field time.
To check the genlock status, press the OK button on the remote several times until the genlock
status is visible. This must be done when no onscreen menu is present. Possible states are OFF,
DISABLED, LOCKING and LOCKED. Genlock is disabled if the output is not an appropriate
multiple of the input. For NTSC, genlock is able to lock output rates of 24sF (actually 23.976Hz),
47.95Hz, 59.94Hz, or 71.93 Hz. For PAL sources, 50 Hz and 75 Hz outputs can achieve lock.
Genlock can be enabled/disabled on a per-input memory basis. The command format is:
MENU → IN → CONFIG → CNTRL → GENLOCK → (YES, NO) OK
DVI input HDCP Capability Setting
Some DVI sources limit functionality when driving HDCP capable devices by disabling analog
outputs on the source, even though the analog outputs do not require HDCP capability. This
command can disable reporting HDCP capability for the current DVI input memory.
NOTE:
When HDCP capability is disabled, HDCP encrypted sources are not displayed.
MENU → IN → CONFIG → DVI → HDCP → (YES, NO) OK
DVI input EDID Display Information
EDID is information that can be read over DVI/HDMI cables to influence how source devices send
video over the HDMI/DVI cable and this can then result in a better picture. Enabling this feature
does not guarantee the source will use the EDID. There are 5 basic settings for the Lumagen
EDID interface. The OFF setting means the source plugged into the Lumagen DVI input will see
no info when it tries to read the EDID. With the PASS setting the Lumagen will read the EDID
from the display and pass that back to the source. The DFLT setting enables some basic display
modes such as 480p, 720 and 1080i. The DFLT+EXT mode enables all of the display modes
currently available and disables advertising the 422 and 444 YCbCr mode. The USER setting
allows the user to individually select which capabilities will be advertised to the connected source.
You can scroll through the list of capabilities with the up/down arrows and toggle advertising the
feature with the left/right arrows. Press "ok" when done. The command format is: