User manual

10
1. Image misalignment will most likely occur when the VGA signal is in the 50Hz timing frequency range
and the less commonly used resolutions in the 60Hz timing frequency range.
a) When switching between VGA resolution signals that have similar timing frequency (horizontal and
vertical frequency, vertical total), image misalignment may occur.
b) e.g., 1280×1024 60Hz change to 1400×1050 60Hz (adjust HSTART/VSTART/HACTIVE/VACTIVE)
and then back to 1280×1024 60Hz (the original timing frequency is very close to that of 1400×1050
60Hz, use HSTART/VSTART/HACTIVE/VACTIVE to re- adjust for 1280×1024 60Hz again).
2. Depending on the signal type, SATURATION and HUE can only be set for YUV color space.
a) YUV is a color space typically used as part of a color image pipeline. It is used to encode a color
image or a video that takes human perception into account, it allows reduced bandwidth for
chrominance components. This enables transmission errors or cause compression artifacts to be
more efficiently masked by the human perception than using a "direct" RGB-representation.
b) When HDMI signal is transmitting under YCbCr422 color space (set from HDMI device itself), the
Pacific C-HSS will enable the SATURATION and HUE function in IMAGE PARAMETER menu. If it is
under YCbCr444 color space, the above functions will be disabled.
Figure 2-4 H-Start, H-Active, H-Total, V-Start, V-Active, V-Total
Crop Image
Status
On: adjusts the crop area and location.
 LEFT: sets the horizontal starting point.
 TOP: sets the vertical starting point.
 RIGHT: sets the horizontal ending point.
 BOTTOM: sets the vertical ending point.
 DEFAULT
Off: disables the crop image feature.
Exit
Exits the crop image setup menu.
Table 2-5 Crop Image
1. The CROP IMAGE feature will be turned OFF when KEYING feature is enabled.
2. Make sure the difference in value for LEFT compared with the RIGHT is not less than 20%
(e.g., LEFT = 80.0% RIGHT = 100.0%). Likewise, the difference in value for TOP compared to the
BOTTOM must not be less than 20% (e.g., TOP = 80.0% BOTTOM = 100.0%). To put it simply,
the smallest crop size that is valid is 20% of the total height by 20% of the total width.