11 tap
HPF
clip
(-512,+511)
>> HPF_norm_shift
NL function
clip
(0,1023)
delay
+
0
y_peak_enable
Y
in
+limit
-limit
+lo_thr
-lo_thr
lo_slope
HPF_coef 0-5
HPF_antisymmetric
9
high threshold
hi_thr
3
hi_slope_shift
1
9
8
9
control
y_peak_enable
clipping limit
limit
lo_slope=-lo_slope_gain/16
lo_slope_gain
16
coring threshold
right shift
HPF_norm_shift
[0 0 0-4 0 8]
HPF_coef 0-5
400
4
hi slope=2^(hi_slope_shift-3)
0
1
sign of upper is inverted lower
coef
HPF_antisymmetric
3
8
bits
0
200
16
lo_thr
4
FIR coefficients
default
description
parameter
delay
delay
+hi_thr
-hi_thr
hi_slope
hi_slope
Y
out
Cb
in
Cb
out
Cr
in
Cr
out
Internal Modules
193
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
1.2.11.2.2 Peaking
The peaking block increases the amplitude of high frequency luminance information in horizontal direction
to increase the sharpness of a video image before it is scaled. As shown in
, the high-
frequency luminance is increased using an 11-tap High-Pass filter with adjustable gain. The non-linear
coring function removes low-level noise and the modified luminance is then added to the original
luminance signal. The implementation details are shown in
Figure 1-142. Filter Implementation and Parameter Description