Datasheet

ADV7320/ADV7321
Rev. A | Page 56 of 88
HD SHARPNESS FILTER AND ADAPTIVE FILTER
APPLICATION EXAMPLES
HD Sharpness Filter Application
The HD sharpness filter can be used to enhance or attenuate the
Y video output signal. The register settings listed in
Table 34 were
used to achieve the results shown in
Figure 74. Input data was
generated by an external signal source.
Table 34. Sharpness Control
Address Register Setting Reference
1
0x00 0xFC
0x01 0x10
0x02 0x20
0x10 0x00
0x11 0x81
0x20 0x00 a
0x20 0x08 b
0x20 0x04 c
0x20 0x40 d
0x20 0x80 e
0x20 0x22 f
1
See Figure 74.
f
e
d
a
b
c
1
R4
R2
CH1 500mV M 4.00μs CH1
ALL FIELDS
REF A 500mV 4.00μs 1
R2
R1
1
CH1 500mV M 4.00μs CH1
ALL FIELDS
REF A 500mV 4.00μs 1
05067-074
9.99978ms
9.99978ms
Figure 74. HD Sharpness Filter Control with Different Gain Settings for HD Sharpness Filter Gain Values