UPD64084 NEC, UPD64084 Datasheet - Page 19

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

5. COMB FILTER BLOCK
circuits.
5.1
logical comb filter based on inter-line correlation to reduce dot and cross-color interference. The filter output (C
used in the moving picture portion of standard signals, nonstandard signals, and blanking periods.
5.2
in still picture portions by the motion detection circuit.
5.3
circuit. In other words, C
by a mixture ratio according to the motion factor k (0 to 1). If the input signal is a nonstandard signal, or if the LINE pin
is at a high level, C
5.4
1H.
(monochrome signal or non-burst signal) or that the KIL pin is at an 'H' level.
This block performs Y/C separation or frame comb type YNR according to the result of checks in various detection
The C signal is separated from video signals that have been delayed by 0H, 1H, and 2H. This filter serves as a
The C signal is separated from video signals that have been delayed by 1H and 526H. The filter output (C
The mixer circuit mixes C signals to adapt to the motion according to the motion factor from the motion detection
The Y
Composite
Subtraction is quitted when the killer detection circuit detects that the input signal is a color killer signal
Line Comb Filter
Frame Comb Filter
Mixer Circuit
C Signal Subtraction
OUT
Memory
Frame
input
signal is separated by subtracting the C
2
is output without performing motion-adaptive mixture.
H
H
H
H
0H
1H
2H
526H
OUT
Frame
comb
filter
is generated by mixing the line comb filter output (C
Killer detection
signal detection
Nonstandard
Line comb
detection
Motion
Delay
Delay
filter
Figure 5-1. Comb Filter Block Diagram
C
H: Nonstandard signal detected
H: Killer signal detected
C
Data Sheet S16021EJ2V0DS
3
k
2
OUT
k =1
signal from a composite video signal that has been delayed by
Mixer circuit
H
L
1
k
k
C
OUT
2
) and the frame comb filter output (C
L
H
0
Y
OUT
Y signal output
C signal output
LINE
KIL
PD64084
3
) is used
2
) is
19
3
)