Sharpness Enhancement; Scaler - Analog Devices ADV8003 Hardware Manual

Function
di_bnr_detect_scale_lin
e[3:0]
0111 
1001
3.2.3.10.

Sharpness Enhancement

The sharpness enhancement block extracts high frequency data from the de-interlaced and de-noised video frame to help simultaneously
sharpen the appearance of edges and other video details, recover high frequency components and provide pictures with a natural look
without adding a halo or ringing artifact. Since the sharpness works on a two dimensional pixel array before the scaler, noise will not be
scaled during the scaling operation.
Detail and edge sharpness enhancement supports both interlaced and progressive inputs. It can be enabled or disabled using
di_sharpness_enable. The sharpness level can be adjusted using the signed, twos complement value in pvsp_srscal_scale_gain[11:0]. To
increase the sharpness setting, the value in
in pvsp_srscal_scale_gain[11:0]
di_sharpness_enable, Primary VSP Map, Address 0xE84C[7]
This bit is used to enable sharpness control.
Function
di_sharpness_enable
0 
1
pvsp_srscal_scale_gain[11:0], Primary VSP Map, Address 0xE891[7:0]; Address 0xE892[7:4]
This signal is used to control the sharpness level.
3.2.3.11.

Scaler

The last block before the VOM output is the scaler which is used to scale the input video to the desired resolution. This is very flexible and
can support arbitrary resolution conversion and independently scale the input video horizontally and vertically. The ADI proprietary
scaler algorithms also allow improved performance in the scaling of the input video which improves many common issues associated with
scaling video data such as saw tooth, edge blurring, and ringing.
The ADV8003 scaler employs contour-based interpolation techniques to provide sharp edges and crisp details on high resolution content.
The embedded compression noise reduction will eliminate mosquito noise and block artifacts. The contour-based interpolation scaler is
capable of upscaling input video formats from 480i to 4k x 2k formats (these include 4k x 2k 30 Hz/4k x 2k 25 Hz/4k x 2k 24 Hz and 4k x
2k 24 Hz SMPTE).
When the automatic scaler algorithm selection is enabled, the contour-based interpolation scaler is used for upscaling and downscaling is
performed using the frequency-adaptive scaler which implements the same algorithm as the VIM down scaler. A manual selection
between the contour-based interpolation scaler and the frequency-adaptive scaler is provided by pvsp_srscal_interp_mode[1:0].
Also, because ADV8003 provides 4kx2k timing in 8-bit precision,
bit mode. This lowers the power consumed by the scaler.
pvsp_srscal_interp_mode[1:0], Primary VSP Map, Address 0xE894[7:6]
This signal is used to select the scaler algorithm employed.
Rev. B, August 2013
Description
Recommended setting for low/mid level BNR
Recommended setting for high level BNR
pvsp_srscal_scale_gain[11:0]
should be decreased.
Description
Disable sharpness
Enable sharpness
should be increased. To decrease the sharpness setting, the value
pvsp_srscal_8bit_en is provided to make the entire scaler operate in 8-
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ADV8003 Hardware Manual