Analog Devices ADV8005, Справочник по аппаратуре

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UG-707 ADV8005 Hardware Reference Manual
Figure 65: VIM Scaler Dimensions
3.3.2.3. Scaler Interpolation Mode
This section describes the method for scaling the input video data. The purpose of the scaler is to allow different input formats to be displayed
on a screen with a fixed resolution. This can allow lower resolution video, for example, 480p, to be upscaled to a high definition format such as
1080p. This can improve the overall quality of a video signal when displayed on a high definition television. The four options of video scaling
are listed below and are chosen using
svsp_vim_scal_type[1:0] .
Refer to Section
3 for more information on the types of scaler algorithm .
svsp_vim_scal_type[1:0] , Secondary VSP Map, Address 0xE646[7:6]
This signal is used to set the VIM scaling algorithm. In most cases, the scaler type should be left at the default setting.
Function
svsp_vim_scal_type[1:0] Description
00 (default) Proprietary ADI Algorithm
01 Sharp
10 Smooth
11 Bilinear
3.3.2.4. VIM Miscellaneous Control
The following registers are used in the control of the VIM scaling function and should be tailored according to user requirements.
Anti-alias filters are provided to improve the performance of the SVSP downscaling and can be enabled using
svsp_vim_scal_anti_alias_h_en
and svsp_vim_scal_anti_alias_v_en .
svsp_vim_scal_anti_alias_h_en , Secondary VSP Map, Address 0xE650[5]
This bit is used to enable the anti-aliasing filter for horizontal direction.
Function
svsp_vim_scal_anti_alias_h_
en
Description
0 Disable
1 (default) Enable
svsp_vim_scal_anti_alias_v_en , Secondary VSP Map, Address 0xE650[6]
This bit is used to enable anti-aliasing filter for vertical direction.
Function
svsp_vim_scal_anti_alias_v_
en
Description
0 Disable
1 (default) Enable
svsp_vim_scal_type[1:0] , svsp_vim_scal_anti_alias_h_en and svsp_vim_scal_anti_alias_v_en can be manually set. These settings take effect
only when svsp_man_scaler_para_enable is set to 1, otherwise they can be automatically configured by the SVSP using
svsp_autocfg_input_vid[7:0] and svsp_autocfg_output_vid[7:0] .
Scaled Image Scaler in
VIM
VSP2D_VIM_SCAL_OUT_HEIGHT
SVSP_VIM_CROP_WIDTH
VSP2D_VIM_CROP_HEIGHT
Image before
Scaler
SVSP_VIM_SCAL_OUT_WIDTH
Scaled Image Scaler in
VIM
SVSP_VIM_SCAL_OUT_HEIGHT
SVSP_VIM_CROP_HEIGHT
Image before
Scaler
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