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Video Scaler v4.0 User Guide
www.xilinx.com
31
UG805 March 1, 2011
GUI Operation
GUI Operation
When the chroma format is specified as 4:4:4, the triple-engine parallel architecture is
always selected. Otherwise, selection between the YC Sequential or Parallel options may
be achieved automatically (YC Filter Configuration = Auto Select) or manually in the
CORE Generator GUI or the EDK GUI (see
Figure 5-4
).
The primary goal of selecting the correct architecture is to optimize resource usage, for a
given worst case operational scenario. When
Auto Select
is selected, the GUI tries to
establish what the user's worst case is from the following input parameters:
•
Input maximum rectangle size
•
Output maximum rectangle size
•
Target Clock-frequency
•
Desired Frame rate
The pseudo-code calculation made by the GUI for the Auto Select option is as follows:
OverheadMultiplier := 1.15;
max_pixels := max(MaxHSizeIn, MaxHSizeOut);
max_lines := max(MaxVSizeIn, MaxVSizeOut);
max_frame_cycles := max_pixels * max_lines * OverHeadMultiplier;
MaxFrameRateOneComponent := (TgtFMax * 1000000)/max_frame_cycles;
if (TgtFrameRate <= MaxFrameRateOneComponent/2) then
Use Single engine
else
Use Dual engine
end if;
X-Ref Target - Figure 5-4
Figure 5-4:
Auto Select in GUI
Содержание LogiCORE IP
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Страница 6: ...Video Scaler v4 0 User Guide www xilinx com UG805 March 1 2011...
Страница 14: ...14 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Preface About This Guide...
Страница 18: ...18 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Chapter 1 Introduction...
Страница 20: ...20 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Chapter 2 Overview...
Страница 70: ...70 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Chapter 9 Performance...
Страница 74: ...74 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Appendix A Use Cases...
Страница 92: ...92 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Appendix B Programmer Guide...