Altera Video and Image Processing Suite - Manual (Page 214)

Gamma Corrector IP Core
15
2015.05.04
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The Gamma Corrector IP core corrects video streams for the physical properties of display devices.
The Gamma Corrector IP core provides a look-up table (LUT) accessed through an Avalon-MM slave
port. The gamma values can be entered in the LUT by external hardware using this interface.
For example, the brightness displayed by a cathode-ray tube monitor has a nonlinear response to the
voltage of a video signal. You can configure the Gamma Corrector with a look-up table that models the
nonlinear function to compensate for the non linearity. The look-up table can then transform the video
data and give the best image on the display.
Gamma Corrector Parameter Settings
Table 15-1: Gamma Corrector Parameter Settings
You program the actual gamma corrected intensity values at run time using the Avalon-MM slave interface.
Parameter Value Description
Bits per pixel per color plane 4–16, Default = 8 Select the number of bits per pixel (per color
plane).
Number of color planes 1–3, Default = 3 Select the number of color planes that are
sent in sequence or parallel over one data
connection.
Color plane transmission format • Color planes in
sequence
• Color planes in
parallel
Select whether to transmit the specified
number of color planes in sequence or in
parallel. For example, a value of 3 planes in
sequence for R'G'B' R'G'B' R'G'B'.
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