UPD64084 NEC, UPD64084 Datasheet - Page 25

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

10. Y SIGNAL OUTPUT PROCESSING BLOCK
compensation for the Y signal submitted to YNR processing.
10.1 Y High-Frequency Coring Circuit
works as a simplified noise reducer, because it can eliminate high-frequency components at 1 LSB to 3 LSB levels.
The coring level is set using YHCOR on the serial bus.
After Y/C separation or Y Noise reduction, this block performs high-frequency coring, peaking, and vertical aperture
The Y high-frequency coring circuit performs coring for the high-frequency component of the Y main line signal. It
<1> HPF circuit
<2> Coring circuit : Performs coring for Y high-frequency components according to the YHCOR setting, and
Composite
input
Vertical high-frequency
component
comb
Line
filter
: Separates the input Y signal into the low- and high-frequency components.
outputs a Y signal by adding the Y high- and low-frequency components after they are
submitted to coring. The coring effect can set 1/2 times by the YHCGAIN setting.
HH decoding
separation
ID1ENW0A1
ID1ENW0A2
YNR
Y/C
Figure 10-1. Y Signal Output Processing Block Diagram
Y
Y high-frequency
coring circuit
Y peaking filter circuit
Vertical aperture compensation circuit
YPFT
HPF
BPF
encoder
LPF
ID-1
Data Sheet S16021EJ2V0DS
Y high-
frequency
Y low-frequency
Coring
Coring
2
1
YHCOR
YHCGAIN
Coring
VAPGAIN
YPFG
k
k
20/283H
VAPINV
Limiter
1
0
ID1ON
Peaking component + vertical
aperture conpensation component
0
1
0
1
YAPS1
YAPS0
Y signal output
(to the DTCO pin)
Y signal output
(to the Y-DAC pin)
PD64084
25