Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.
To reduce loss of detail, the high frequencies can be bypassed.
This can be done because the human eye is more sensitive to
noise with low frequencies. The movement detection is
implemented in the luminance channel and in the color channel
to reduce artefacts such as smearing.
9.6.5
Vertical Peaking
The vertical peaking circuit in FEM works on de-interlaced
data, resulting in a double resolution (compared to PICNIC)
high vertical frequency enhancement.
9.6.6
EDDI
EDDI is an Edge Dependent De-Interlacer. This improved de-
interlacer, results in smaller jagged lines for video input
sources (not for film sources!).
9.6.7
Strobe
Having a FEM in the data path, it is easy to create a still picture
or freeze feature. A frame can be frozen once, or, using the
strobe feature, repetitively after a certain programmable
interval of time. The Eagle is used to make “still pictures”.
9.7
Eagle
The Eagle has the following features:
•
Vertical upscaler.
Two fully programmable vertical
upscalers are implemented in the Eagle chip, one for the
luminance signal, and one for the color difference signals.
However, the number of output lines is never allowed to
exceed 1024 lines per field including blanking. This means
that 1050i/1250i is still possible.
•
Vertical Zoom.
The vertical zooming is done with the
vertical upscaler of the Eagle instead of using the FEM
upscaling. Zoom factors varying from 1 to 8 can be
selected. Vertical compression is possible in 1fV up to a
factor of 2.
•
Interlacer and horizontal upscaler.
Two fully
programmable horizontal upscalers are implemented in the
Eagle chip, one for the luminance signal, and one for the
color difference signals.
•
Continuous horizontal zoom/compression.
The
horizontal zooming is done with the interlacer and
horizontal upscaler of the Eagle instead of the PICNIC
upscaling. In the Eagle, a digital sample rate converter can
provide horizontal video compression up to 50 %, and up
to 8 times zoom. In compress mode, a part of the screen
remains unused. In this case, parts of the display can be
filled in with a grey value, a color, or other signal source
that bypasses the Feature Box (CC or another compressed
picture).
•
Panorama.
A panoramic horizontal distortion on the
picture can be applied to make a screen-fitting picture,
without having black side panels, or lost video. This is
mainly used to fit 4:3 pictures in a 16:9 display with a
resulting correct aspect ratio in the middle of the screen
and stretched video at the left and right sides. The inverse
feature is called “amaronap” and can also be applied.
•
Sub pixel
Luminance Transient Improvement
(LTI): The
Eagle contains a horizontal and a vertical sub pixel LTI.
•
Peaking
: In the Eagle both horizontal and vertical
luminance peaking is implemented. The horizontal peaking
equals the peaking of the PICNIC. The vertical peaking is
an addition of two fixed and one 9-taps fully programmable
peaking filters.
–
Horizontal luminance peaking: Peaking in Eagle can
be used in two ways:
a.
The first way is to give the luminance a linear boost
of the higher frequency ranges, which makes no
distinction between small and large details or
edges.
b.
The other way is to use the peaking dynamically, in
order to boost smaller details and provide less gain
on large details and edges. The effect is detail
enhancement without creation of unnatural large
over- and undershoots on large details and edges.
–
Vertical luminance peaking: There are three vertical
peaking filters. Two fixed vertical peaking filter and one
fully programmable vertical peaking filter. The three
filters all have their separate gain setting before the
results are added. To avoid excessive gain settings a
high peak suppression can be set to avoid excessive
output results.
•
Color Dependent Sharpness
(CDS): The color
dependent sharpness circuit increases the luminance
sharpness in saturated red and magenta parts. The
reduction of the normal peaking can be switched “on/off”.
The below given color features are implemented in the Eagle:
•
Digital Color Transient Improvement
(DCTI): DCTI
equals the PICNIC DCTI implementation with improved
control range. The DCTI is done with Eagle i.s.o. PICNIC.
•
Skin tone correction
: The idea of Skin tone correction is
to correct UV components corresponding to skin towards
an “ideal” skin tone axis.
•
Blue Stretch
: This feature makes it possible to shift colors
near white towards more bluish colored white.
•
Green Enhancement
: This feature makes it possible to
shift low saturated green colors towards more saturated
green colors.
•
Color Dependent Peaking
(CDP): When using luminance
peaking, the viewer has the impression that the color
performance is somewhat lower then in the picture
generated without the luminance peaking circuit. This
impression is normal because no action was done in the
color channel to compensate for the change in the
luminance channel. Locally, at the edge position the
contrast has been increased without increase of the
saturation at this point. That is why the viewer perceives
less color. To give the viewer the same color impression as
on the original picture, a correction to the color has to be
done at the same place where a change was made in the
luminance. This is CDP.
•
Skin Tone Dependent Peaking
(STDP): The horizontal
and vertical peaking can be reduced in skin tone areas to
avoid that people become too old. Attenuation can be
applied to both horizontal and vertical peaking.
9.8
Synchronisation
See the FTL13 manual for a (more) detailed description.
9.9
Audio
See the FTL13 manual for a (more) detailed description.
9.10
Control
See the FTL13 manual for a (more) detailed description.
9.11
Proximity Sensor (if present)
9.11.1
Introduction
The function of Proximity Sensor is to detect a motion when the
customer is approaching the set. It will then light up the LEDs
on the set for 6 s (detection area is 1.5 - 2 m). Its functionality
is based upon IR emission, IR detection, and LED lighting
processes. These three different phases are defined as
follows:
1.
First, it emits a signal through an IR transmitter.