7. Advanced
frame B frame C frame D
frame B frame C frame D
z
z = transport delay or TDR
signal coming
from PMP (1st step)
signal processing
in PMP (2nd step)
Image 7-95
Transport delay
During this delay all image information is stored in a memory block on the PMP.
A Transport Delay set to the maximum value of 1023, corresponds with a delay of 16 ms.
What can be done with the Transport Delay ?
The data flow of any frame starts with pixel 1 of line 1 of this frame and is processed line by line.
In the example of a top side bow distortion, the first pixel to be displayed is not pixel 1 of the original line 1, but pixel x (>1) of the
original line 1. This means that every pixel which comes before pixel x in the original line 1 must be stored in a temporary memory,
before the processing of the frame can start.
Image 7-96
Transport Delay basic principle
The Transport delay can be adjusted manually or can be set to automatic.
A short Transport delay creates a small delay with respect to the source, but a large delay is needed in case extremely distorted
images are needed (extremely curved screens).
A delay set too short may introduce ’clipping’ phenomenons in the image.
How to set Transport Delay to manual or autom
atic ?
1. Start up the Geometry Edit menu
2. Push the cursor key ↑ or ↓ to highlight Transport Delay... and press ENTER to select.
R59770324 SIM 5W 22/12/2011
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