Altera Video and Image Processing Suite User Manual
Page 231
Parameter
Value
Description
No blanking in video
On or Off
Turn on if the input video does not contain
vertical blanking at its point of conversion to
the Avalon-ST video protocol.
Scaling algorithm
• Nearest Neighbor
• Bilinear
• Bicubic
• Polyphase
• Edge Adaptive
Select the scaling algorithm.
Enable post scaling sharpen
On or Off
Turn on to include a post-scaling edge-
adaptive sharpening filter.
Always downscale or pass-
through
On or Off
Turn on if you want the output frame height
to be less than or equal to the input frame
height, which reduces the size of the line
buffer by one line.
If the input height becomes less than the
specified output height for any reason, the
output video is undefined but it must still
have the correct dimensions and the core
must not crash.
Share horizontal and vertical
coefficients
On or Off
Turn on to force the bicubic and polyphase
algorithms to share the same horizontal and
vertical scaling coefficient data.
Vertical filter taps
4–64, Default = 8
Select the number of vertical filter taps for the
bicubic and polyphase algorithms.
Vertical filter phases
1–256, Default = 16
Select the number of vertical filter phases for
the bicubic and polyphase algorithms.
Horizontal filter taps
4–64, Default = 8
Select the number of horizontal filter taps for
the bicubic and polyphase algorithms.
Horizontal filter phases
1–256, Default = 16
Select the number of horizontal filter phases
for the bicubic and polyphase algorithms.
Default edge threshold
0 to 2
bits per symbol
–1,
Default = 7
Specify the default value for the edge-adaptive
scaling mode. This value will be the fixed
edge threshold value if you do not turn on
Enable run-time control of input/output
frame size and edge/blur thresholds.
17-10
Scaler II Parameter Settings
UG-VIPSUITE
2015.05.04
Altera Corporation
Scaler II IP Core