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Figure 10-5. Additional Video Delay
Additional video delay allows the output refresh to be delayed by up to 5 frames. This allows
Tessera processors to match the latency present in other display systems.
Custom Test Patterns
It is possible to import a bitmap to use as custom test pattern. To use the custom test
pattern select the test pattern button on the main canvas window and select Custom Test
Pattern from the drop down menu. Tessera supports a maximum 8MB file size and supports
.jpg, .PNG, .bmp and TIFF formats at up to 1920 x 1080.
Low Latency Mode
Low Latency Mode bypasses the following of Tessera's front-side processing functions: de-
interlacing, scaling (upscaling and downscaling), active area, and frame-rate conversion.
This reduces the overall latency by one frame. Colour functions, such as contrast, brightness
and RGBgain remain unaffected. The input source comes in at it's particular resolution and
sync frequency and is positioned 1:1 in the top left corner of the canvas.
NB the processor does not support interlaced video sources in Low Latency Mode.
S-series processors are always in low latency mode, and non-standard canvas sizes switch
the processor into low latency m0de.
The frame rate of the processor is determined by source frame rate, and what the internal or
external reference might be set to.
Typical Latency
The typical latency of the Tessera processors from input to panel refresh for progressive
sources is as follows:
Fixtures using constant current LEDdrivers and using generic constant current drivers: 2
frames.
Fixtures using PWMLEDdrivers: 3 frames.
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