UPD64084 NEC, UPD64084 Datasheet - Page 31

• Manufacturer Part Number: UPD64084
• Description: THREE-DIMENSIONAL Y/C SEPARATION LSI WITH ON-CHIP MEMORY
• Manufacturer: NEC

14. DIGITAL CONNECTION WITH GHOST REDUCER IC PD64031A
units when it is directly connected to NEC Electronics' ghost reducer IC PD64031A.
14.1 Outline
digital amplifier circuit adjusts the amplitude of the signal. As a result, a 10-bit digital composite video signal is sent to
the three-dimension Y/C separation IC PD64084. The
and outputs a Y/C video signal that has been converted into an analog signal (see Figure 14-1).
PD64031A, where the ghost of the signal is reduced. The digital clamp circuit then adjusts the pedestal level, and the
The
Figure 14-1 shows the system configuration when the PD64031A and PD64084 are digitally connected directly.
When signals are input from a ground wave tuner, the composite video signal is first input to the A/D converter of the
PD64084 can perform processing from ghost reduction to three-dimension Y/C separation digitally in 10-bit
C sync separation
Tuner input
Composite video signal input
Figure 14-1. Example of Digital Connection System with Ghost Reducer
GR filter
generator
ADC
f
SC
PD64031A
Digital clamp
amplifier
Delay
8f
PLL
SC
(when signals are input from tuner)
DO9 to DO0
CKMD
CLK8
ALTF
OCP
CSO
WP1
CLK8 input
and 8f
PL L stop
Data Sheet S16021EJ2V0DS
20 MHz
10-bit digital
composite
video signal
SC
DYCO9 to
PD64084 then performs processing such as Y/C separation
DYCO0
ALTF
ST0
CSI
8f
f
SC
SC
Clamp pulse
4f
SC
f
generator
SC
/227.5f
separation
ADC
Y/C
PD64084
f
H
SC
path selection
1/2
f
DAC
SC
Y/C video output
PLL
8f
BPF
SC
DAC
CKMD
CLK8
PD64084
31