adv7314 Analog Devices, Inc., adv7314 Datasheet - Page 51

• Manufacturer Part Number: adv7314
• Description: Multiformat 216 Mhz Video Encoder With Six Nsv 14-bit Dacs
• Manufacturer: Analog Devices, Inc.

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 following register settings were
used to achieve the results shown in the figures below. Input
data was generated by an external signal source.
Address
00h
01h
02h
10h
11h
20h
20h
20h
20h
20h
20h
REV. 0
Figure 43. HD Sharpness Filter Control with Different Gain Settings for HS Sharpness Filter Gain Value
R2
R4
1
CH1
REF A
Register
Setting
FCh
10h
20h
00h
81h
00h
08h
04h
40h
80h
22h
500mV
Table XII.
500mV 4.00 s
Reference in
Figure 43
a
b
c
d
e
f
1
M 4.00 s
9.99978ms
ALL FIELDS
CH1
–51–
b
a
c
R2
R1
The effect of the sharpness filter can also be seen when using
the internally generated cross hatch pattern.
In toggling the sharpness filter enable bit [Address 11h, Bit 7],
it can be seen that the line contours of the cross hatch pattern
change their sharpness.
1
CH1
REF A
500mV
Address
00h
01h
02h
10h
11h
20h
500mV 4.00 s
1
Table XIII.
M 4.00 s
9.99978ms
Register Setting
FCh
10h
20h
00h
85h
99h
ALL FIELDS
ADV7314
CH1
d
e
f