12. Stereoscopic multichannel setup
12.2 AS3D synchronization best practice
General
System complexity is naturally increase w hen the installation consists of multiple channels. If the system is not designed correctly
or the individual system components are not con figured correctly, image artifacts w ill occur; or t he image might not be displayed at
all. A very important aspect of planning any multi-channel in stallation is how to synchronize the projected channels.
When in AS3D it is impossible to obtain realistic 3D imagery if the projectors and projected images are not perfectly synchronized
as the left eye inform ation and the right eye information will be slightly different.
IG IG
IR
DP1
DP2 DP1 DP2
IGIG
Image 12-1
Consider the s etup shown above. This is a typical dua l head 3D s etup where ea ch projector channel is driven by two individual
Image Generators (IG). T he pr oblem is that the IG are not in
sync with each other. Each projector will synchronize its projected
image with one of the DVI inputs. F rame rate c onversion will be applied to the other input as necessary but the two projectors will
not be in sync with each other. The preferred way to synchronize the projected images is to synchronize the IG. This is the only way
all image artifacts may be eliminated from the resul
ting im age a nd is true for all projector brands; not only Barco projectors. If, for
some reason, one c hooses to have asynchronous IG then extra synchronization must be per formed by the projectors and while an
excellent 3D experience is obtained this way, there will be motion artifacts in the resulting image. Troubleshooting AS3D multichannel
installation issues, and in particular source
synchronization issues, can be done using the Status menu. S ee "Troubleshoot source
sync issues", page 102 for more information.
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