GM5115 Datasheet, PDF (35/58 Pages) List of Unclassifed Manufacturers – ONPANEL LCD PANEL CONTROLLER

*** Genesis Microchip Confidential ***
gm5115/25 Preliminary Data Sheet
4.7.2 Color Standardization and sRGB Support
Internet shoppers may be very picky about what color they experience on the display.
Gm5115/25 RealColor^TM digital color controls can be used to make the color response of an LCD
monitor compliant with standard color definitions, such as sRGB. SRGB is a standard for color
exchange proposed by Microsoft and HP (see www.srgb.com). gm5115/25 RealColor controls
can be used to make LCD monitors sRGB compliant, even if the native response of the LCD
panel itself is not. For more information on sRGB compliance using gm5115/25 family devices
please refer to the sRGB application brief C5115-APB-02A.
4.8 High-Quality Scaling
The gm5115/25 zoom/shrink scaler uses an adaptive scaling technique proprietary to Genesis
Microchip Inc., and provides high quality scaling of real time video and graphics images. An
input field/frame is scalable in both the vertical and horizontal dimensions.
Interlaced fields may be spatially de-interlaced by vertically scaling and repositioning the input
fields to align with the output display’s pixel map.
4.8.1 Variable Zoom Scaling
The gm5115/25 scaling filter can combine its advanced scaling with a pixel-replication type
scaling function. This is useful for improving the sharpness and definition of graphics when
scaling at high zoom factors (such as VGA to XGA).
4.8.2 Horizontal and Vertical Shrink
A shrink function may be performed on the input data. This is an arbitrary horizontal active
resolution reduction to between (50% + 1 pixel) to 100% of the input. For example, this allows
SXGA 1280 pixels to be displayed as 1024 (XGA).
The gm5115/25 provides an arbitrary vertical shrink down to (50% + 1 line) of the original image
size. Together with the arbitrary horizontal shrink, this allows the gm5115/25 to capture and
display images one VESA standard format larger than the native display resolution. For
example, SXGA may be captured and displayed on an XGA panel.
4.8.3 Moiré Cancellation
The gamma curve and other non-linearities can affect the energy distribution of pixels when
scaled to different areas of the screen. This is an example of the Moiré effect. The gm5115/25 has
hardware features to negate the Moiré effect, improving the scaling quality.
June 2002
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C5115-DAT-01H