Altera Video and Image Processing Suite - Manual (Page 127)

Video Clipping IP Cores
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2015.05.04
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The Video Clipping IP cores clip video streams. You can configure these IP cores at compile time, or run
time using an Avalon-MM slave interface.
The Video Clipping IP cores—Clipper and Clipper II—provide a means to select an active area from a
video stream and discard the remainder. You can specify the active region by providing the offsets from
each border or a point to be the top-left corner of the active region along with the region's width and
height.
The Video Clipping IP cores handle changing input resolutions by reading Avalon-ST Video control
packets. An optional Avalon-MM interface allows the clipping settings to be changed at run time.
Compared to the Clipper IP core, the Clipper II IP core potentially uses less area while delivering higher
performance.
Video Clipping Parameter Settings
Table 8-1: Clipper Parameter Settings
Parameter Value Description
Maximum width 32 to input image
width,
Default = 1024
Specify the maximum frame width of the
clipping rectangle for the input field (progres‐
sive or interlaced).
Maximum height 32 to input image
width,
Default = 768
Specify the maximum height of the clipping
rectangle for the input field (progressive or
interlaced).
Bits per pixel per color plane 4–20, Default = 8 Select the number of bits per pixel (per color
plane).
Number of color planes in
sequence
1–3, Default = 3 Select the number of color planes that are
sent in sequence over one data connection.
For example, a value of 3 for R'G'B' R'G'B'
R'G'B'.
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