User guide

3–6 Chapter 3: Interfaces
Avalon-ST Video Protocol
Video and Image Processing Suite January 2013 Altera Corporation
User Guide
Table 3–3 lists the recommended color patterns for common combinations of color
spaces and color planes in parallel and sequence.
Following these recommendations, ensures compatibility minimizing the need for
color pattern rearranging. These color patterns are designed to be compatible with
common clocked video standards where possible.
1 If you must rearrange color patterns, you can use the Color Plane Sequencer
MegaCore function.
Specifying Color Pattern Options
You can specify parameters in the parameter editor that allow you to describe a color
pattern that has its color planes entirely in sequence (one per cycle) or entirely in
parallel (all in one cycle). You can select the number of color planes per pixel, and
whether the planes of the color pattern transmit in sequence or in parallel.
Some of the MegaCore functions' user interfaces provide controls allowing you to
describe a color pattern that has color plane samples in parallel with each other and in
sequence such that it extends over multiple clock cycles. You can select the number of
color planes of the color pattern in parallel (number of rows of the color pattern) and
the number of color planes in sequence (number of columns of the color pattern).
Table 3–3. Recommended Color Patterns
Color Space
Recommended Color Patterns
Parallel Sequence
R’G’B
Y’CbCr
4:2:2 Y’CbCr
4:2:0 Y’CbCr
B
G
R
RGB
Y
Cb
Cr
CrCb Y
Cb Cr
YY
CrCb YY
CrCb
Y
Y
Cb
Cr
Y Y