Scaler Interpolation Mode; Vim Miscellaneous Control - Analog Devices ADV8005 Hardware Reference Manual

UG-707
Image before Image before
Scaler Scaler
VSP2D_VIM_CROP_HEIGHT SVSP_VIM_CROP_HEIGHT
SVSP_VIM_CROP_WIDTH
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
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]
00 (default)
01
10
11
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
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
0
1 (default)
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
0
1 (default)
svsp_vim_scal_type[1:0], svsp_vim_scal_anti_alias_h_en
only when svsp_man_scaler_para_enable
svsp_autocfg_input_vid[7:0]
Scaler in Scaler in
VIM VIM
Figure 65: VIM Scaler Dimensions
Description
Proprietary ADI Algorithm
Sharp
Smooth
Bilinear
Description
Disable
Enable
Description
Disable
Enable
is set to 1, otherwise they can be automatically configured by the SVSP using
and svsp_autocfg_output_vid[7:0].
ADV8005 Hardware Reference Manual
SVSP_VIM_SCAL_OUT_WIDTH
algorithm.
and svsp_vim_scal_anti_alias_v_en
Rev. A | Page 144 of 317
Scaled Image Scaled Image
SVSP_VIM_SCAL_OUT_HEIGHT VSP2D_VIM_SCAL_OUT_HEIGHT
svsp_vim_scal_anti_alias_h_en
can be manually set. These settings take effect