TDA9178T Philips Semiconductors, TDA9178T Datasheet - Page 19

• Manufacturer Part Number: TDA9178T
• Description: YUV one chip picture improvement based on luminance vector-/ colour vector- and spectral processor
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes
1. The amount of correction depends on the parameters of the incoming YUV signals; therefore it is not possible to give
2. The amount of correction depends on the parameters of the incoming YUV signals; therefore it is not possible to give
3. The contour signal cannot be measured separately from the luminance input signal. The contour signal is also
4. Peaking set to minimum. Input signal is a sine wave with the nominal peak-to-peak amplitude corresponding to the
5. Input signal is a 250 kHz block with a rise time of 260 ns and a nominal peak-to-peak amplitude corresponding to the
1999 Sep 24
Overall output group delay performance
t
t
Noise measurement
R
t
Cue flash
CUE FLASH OUTPUT
V
I
d(YUV)
dm(UV-Y)
con
sink(max)
o(max)
noise
YUV one chip picture improvement based on luminance
vector-, colour vector- and spectral processor
SYMBOL
exact figures for the correction angle. The aperture angle of the correction range of 45 ( 22.5 ) is just given as an
indication and is valid for an input signal with a luminance signal amplitude of 75% and a colour saturation of 50%.
exact figures for the correction angle.
processed by the smart noise controller. The frequency transfer in the peaking mode of the luminance signal can be
derived from the frequency transfer of the selected contour signal, taking into account the summation of the contour
signal and the luminance input signal. The frequency transfer is most easily measured by sine excitation with a
relatively small signal amplitude of 10% of the selected dynamic range of the luminance input, to avoid interaction
with the step detector.
selected input range.
selected input range.
input to output delay of YUV signals 1f
adjustment delay U and V signals
w.r.t. Y signal
range of noise detector
conversion time
maximum output voltage
maximum sink current
(
PIN
CF);
PARAMETER
OPEN COLLECTOR
2f
1f
2f
see Figure 18
pull-up to external
supply
H
H
H
H
mode; transparent
mode; transparent
mode; transparent
mode; transparent
19
CONDITIONS
32
16
45
MIN.
300
180
0
0
32f
TYP.
V
Preliminary specification
+40
+20
5.5
1
20
MAX.
TDA9178
ns
ns
ns
ns
dB
s
V
mA
UNIT