![Xilinx LogiCORE IP Скачать руководство пользователя страница 54](http://html2.mh-extra.com/html/xilinx/logicore-ip/logicore-ip_user-manual_3378198054.webp)
54
www.xilinx.com
Video Scaler v4.0 User Guide
UG805 March 1, 2011
Chapter 8:
Coefficients
•
User setting for "Separate H/V coefficients"
The simplest method is to specify an intermediate value
num_banks
:
num_banks=4;
if (Separate H/V coefficients = 0) then
num_banks := num_banks/2;
end;
if (Separate Y/C coefficients = 0) or (chroma_format=4:4:4)
then
num_banks := num_banks/2;
end;
Consequently, the number of entries in the .coe file can be defined as:
num_coefs_in_coe_file = max_coef_sets x num_banks x max_phases x
max_taps
•
Within each set, coefficient banks must be specified in the following order:
•
Within each bank, all phases must be listed consecutively, starting with phase 0,
followed by phase 1, etc.
•
The number of phases specified (per bank) in the .coe file must be equal to
Max_Phases, even for filters that use fewer phases. Set all coefficients in unused
phases to 0 (decimal) or 0000000000000000 (16b binary).
•
Within each phase, all coefficients must be listed consecutively. The first specified
coefficient for any phase represents the value applied to the newest (rightmost or
lowest) tap in the aperture.
Table 8-10
shows an example of a .coe file with the following specification:
num_h_taps = num_v_taps = 12;
max_phases = 4;
max_coef_sets = 1;
Separate H/V Coefficients = False;
Separate Y/C Coefficients = False;
Table 8-9:
Ordering of Coefficients in .coe File for Different Coefficient Sharing
Options
Separate Y/C Coefficients Separate H/V Coefficients
Bank Order in .coe File
True
True
HY, HC, VY, VC
True
False
H, V
False
True
Y, C
False
False
Single set only
Содержание LogiCORE IP
Страница 1: ...LogiCORE IP Video Scaler v4 0 User Guide UG805 March 1 2011...
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...