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Video Scaler v4.0 User Guide
UG805 March 1, 2011
Chapter 1:
Introduction
Providing Feedback
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Documentation
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Nomenclature
The following are defined for the purposes of this document:
Table 1-1:
Nomenclature
Term
Definition
Scaler Aperture
The input data rectangle used to create the output data rectangle.
Filter Aperture
The group of contributory data used in a filter to generate one
particular output. The number of elements in this group of data is
the number of taps. We define the filter aperture size using the
num_h_taps
and
num_v_taps
parameters.
Coefficient Phase
Each tap is multiplied by a coefficient to make its contribution to
the output pixel. The coefficients used are selected from a “phase”
of
num_x_taps
coefficients. The phase selection is dependent
upon the position of the output pixel in the input sampling grid
space. For each dimension of the filter, each coefficient phase
consists of
num_h_taps
or
num_v_taps
coefficients.
Channel
For scaler purposes, all monochromatic video streams, for example
Y, Cb, Cr, R, G, B, are all considered separate channels.
Coefficient Phase Index An index given that selects the coefficient phase applied to one
filter aperture in a FIR. For an n-tap filter, this index points to n
coefficients.
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...