HELIOS LED Processing Platform - USER GUIDE 49
GhostFrame (Advanced)
GhostFrame is a tool for the motion picture and virtual production industries that takes advantage of the high refresh rates
of LED displays to interleave content for cameras with content meant for human vision. LED display panel refresh rates are
usually many times higher than the video input frequency. With content usually delivered at 60Hz there is plenty of time
for HELIOS to add several sub-frames (up to the tile limit) to the primary video signal. These sub-frames can be solid
colors, still images and even secondary video feeds to support digital production tools like chroma key or motion tracking.
GhostFrame gives the user control of where in time each sub frame is placed, and the luminosity of the frames.
GhostFrame’s patented process is able to make the; secondary video feeds, chromakey and tracking markers all invisible
to the human eye, free of any ickering or strobing. Multiple cameras can capture independent images simultaneously as
camera shutters are put in phase with different frames.
System bandwidth is unaffected by the use of still images, chroma key frames, and inverse images. These are all handled
on the tile’s processor. It is the video streams which are bandwidth costly. If a GhostFrame conguration makes use of two
video streams, the overall system bandwidth is halved.
GhostFrame features require a separate license to activate (more information about licenses can be found in the Settings
Pane Licensing section) please see http://ghostframe.com for additional details.
GhostFrame requires compatible LED tiles. Currently, GhostFrame is available on ROE Visual and Megapixel VR display
products.
NOTE: Tile test patterns disable GhostFrame. Tile test patterns and tile Identify are mutually exclusive to GhostFrame.
Figure 64: GhostFrame interface
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