UPD64084 NEC, UPD64084 Datasheet - Page 26

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

10.2 Y Peaking Filter Circuit
signal.
10.3 Vertical Aperture Compensation Circuit
the Y signal to emphasize contours.
10.4 Turning On/Off Y Peaking and Vertical Aperture Compensation
10.5 ID-1 Encoder
20H/283H.
ID1ENW0A2 specify the bit information to be superimposed.
ID-1 information.
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The Y peaking filter circuit performs peaking processing for the Y signal to correct the frequency response of the Y
<1> BPF circuit
<2> Coring circuit
<3> Gain adjustment circuit : Performs gain adjustment for peaking components according to the YPFG setting on
<4> Addition to the main line : Y peaking components, together with vertical aperture compensation components,
The vertical aperture compensation circuit extracts vertical contour components from a Y signal and adds them to
<1> Line comb filter
<2> LPF circuit
<3> Coring circuit
<4> Gain adjustment circuit : Performs gain adjustment for aperture compensation components according to the
<5> Limiter circuit (nonlinear processing) :
<6> Addition to the main line : Vertical aperture compensation components, together with Y peaking components,
The YAPS setting on the serial bus can be used to turn Y peaking and vertical aperture compensation on and off.
Bit information conforming to the ID-1 standard (CPX-1204) can be superimposed on the Y signal output at
If ID-1 information has already be superimposed on the original signal, it will be replaced with the newly specified
ID1ENON on the serial bus specifies whether to turn on or off superimposition.
: Extracts high-frequency components from the original Y signal according to the
: Performs ±2LSB (in 8-bit terms) coring for Y high-frequency components to prevent
: Extracts vertical high-frequency components from the video signal.
: Eliminates C signal components and Y signal slant components to extract vertical
: Performs ±1LSB (in 8-bit terms) coring for vertical high-frequency components to
YPFT setting on the serial bus. The center frequency of the BPF can be selected
from 3.58, 3.86, 4.08, and 4.22 MHz.
S/N deterioration during peaking processing.
the serial bus. The gain to be added can be changed in 16 steps over a range
between 1.000 times and +0.875 times.
are added to the Y signal.
contour components.
prevent S/N deterioration during aperture compensation.
VAPGAIN setting on the serial bus.
Performs limit processing for aperture compensation components according to the
VAPINV setting on the serial bus. Signals for which contours are to be emphasized
are rather weak ones.
becoming too large. To solve this problem, the limiter circuit blocks signals larger
than the VAPINV setting, thereby disabling contour emphasis for large signals.
are added to the Y signal.
Data Sheet S16021EJ2V0DS
Uniform emphasis would result in initially large signals
ID1ENW0A1 and
PD64084