ADV8003 Hardware Manual
Rev. B, August 2013
192
Figure 63: 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
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
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
and
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_alia
s_h_en
Description
0
Disable
1
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.
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
Содержание ADV8003
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