Altera Video and Image Processing Suite User Manual
Page 40
Figure 2-10: Vertically Subsampled Y'CbCr
The figure below samples from the upper color plane transmitted on even rows and samples from the
lower plane transmitted on odd rows.
Cb
Cr
Y
Y
Plane for even rows
Plane for odd rows
Table 2-5: Examples of Static Avalon-ST Video Data Packet Parameters
The table below lists the static parameters and gives some examples of how you can use them.
Parameter
Description
Bits per Color Sample
Color Pattern
8
R
G
B
Three color planes, B’, G’, and R’ are transmitted in
alternating sequence and each B’, G’, or R’ sample is
represented using 8 bits of data.
10
B
G
R
Three color planes are transmitted in parallel, leading to
higher throughput than when transmitted in sequence,
usually at higher cost. Each R’, G’, or B’ sample is
represented using 10 bits of data, so that, in total, 30 bits
of data are transmitted in parallel.
10
Cb Cr
Y
Y
4:2:2 video in the Y’CbCr color space, where there are
twice as many Y’ samples as Cb or Cr samples. One Y’
sample and one of either a Cb or a Cr sample is
transmitted in parallel. Each sample is represented using
10 bits of data.
The Avalon-ST Video protocol does not force the use of specific color patterns, however a few IP cores of
the Video and Image Processing Suite only process video data packets correctly if they use a certain set of
color patterns.
Table 2-6: Recommended Color Patterns
The table below lists the recommended color patterns for common combinations of color spaces and color planes
in parallel and sequence.
Parameter
Recommended Color Patterns
Bits per Color Sample
Parallel
Sequence
R’G’B
B
G
R
R
G
B
UG-VIPSUITE
2015.05.04
Static Parameters of Video Data Packets
2-13
Interfaces
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