Philips FTP1.1E Service Manual page 41

Colour television
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Circuit Descriptions, Abbreviation List, and IC Data Sheets
1. The standard detection starts with a 2fH/3fH selection (this
is AV5 / AV6 in Europe or AV4 / AV5 in USA).
2. The ADC is full powered (it was powered down in 1fH).
3. The sound is muted and the picture is blanked.
4. On AV4 in USA, an 1fH and 2fH/3fH signal can enter. This
detection is done by the HIP. When 1fH is detected, the
FBX is set to 1fH, the PICNIC is not in free run, the picture
is unblanked, and the sound is demuted. The set is in 1fH
state. This state is continues checked, because the input
can change from 1fH to 2fH/3fH.
5. If the input is 2fH/3fH, the PICNIC is set to free run
6. The ADC is set to the last status from this selected input,
because there is a big chance that the same standard is
wanted.
7. The number of samples per line and lines per field is
collected from the EBILD. The check is done three times. If
the same value is measured within some tolerances (see
lookup table) the standard is valid. The time between two
measurements must be at least one frame or 20 ms.
Table 9-3 I/O lookup table
Selected Input
Standard
Tuner, SC1..SC3. 480i
576i
AV5 (Cinch)
480p
576p
1080i / 60 Hz
1080i / 50 Hz
720p / 60 Hz
720p / 50 Hz
AV6 (VGA)
480p
576p
1080i / 60 Hz
1080i / 50 Hz
720p / 60 Hz
720p / 50 Hz
VGA
SVGA
9.5
Video Processing
9.5.1
Introduction
Note: The FBX processing part is equal to the one described
in the EM6E manual. Therefore, it is not described here (except
for some basic info).
There are two diversities (see also figure "Block diagram
FTP11" in paragraph "Block Diagram"):
Europe: 3 SCARTs, 1 x 2fH/3fH inputs (YPbPr), and 1 VGA
input
USA: 3 AV inputs1 (AV4 can be 1fH or 2fH/3fH YPbPr), and
a DVI 2fH/3fH input.
Note: There is also an AP version available. This version has
no difference w.r.t. the European version, but comes with extra
cables and some different option settings.
Short overview of video processing
The video processing is based on four key functions, being:
The HIP + comb filter (for simple source select and video/
chroma processing).
The EBILD that takes over the video control functions of
the HOP (as used in CRT based sets).
The FBX configuration consisting of a PICNIC (100 Hz
featuring), a FALCONIC (motion compensation and Auto
TV featuring), and an EAGLE ("Pixel Plus" processing).
A 2fH/3fH source selection.
Additionally, the following features are added
x fH
FBX
1 fH
PICNIC
1 fH
PICNIC
2 fH
EAGLE
2 fH
EAGLE
2 fH
EAGLE
2 fH
EAGLE
3 fH / 720p
EAGLE
3 fH / 720p
EAGLE
2 fH
EAGLE
2 fH
EAGLE
2 fH
EAGLE
2 fH
EAGLE
3 fH / 720p
EAGLE
3 fH / 720p
EAGLE
2 fH
EAGLE
2 fH
EAGLE
FTP1.1E
8. If the ADC has not the right settings, the PLL does not lock,
and the "STDET" measurements do not give the same
results. The ADC is set to its default value; this value is able
to catch all supported standards. If the ADC is already in
the default value and no standard detection is possible, the
set changes to blue mute.
9. If the standard is not supported, the set changes to blue
mute via the EBILD, and a message is displayed.
10. If the standard is the same as the last status, the ADC is in
the correct state, an both FBX and EBILD are set (see
lookup table).
11. If the standard is changed, the ADC is set to the detected
standard and a new check is done. If the standard is valid
and supported, the new standard is stored in NVM as last
status.
12. The FBX and EBILD are set (see lookup table)
13. Picture is unblanked and sound demuted.
ADC
EPLD
Field Rate
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
YPbPr
RGB
RGB
RGB
RGB
RGB
RGB
RGB
RGB
One-chip NEC 3D comb filter (only for USA): this comb
filter uses spatial and temporal filtering for the elimination
of cross colour and cross luminance components. Not only
for vertical lines, but also for stationary diagonal lines. This
comb filter only supports the NTSC standard.
The light sensor measurement required for "Active Control"
is done by the OTC.
Basic functionality of HIP
I/O functionality
The HIP selects the signals entering on 1fH base band.
The HIP contains a source select matrix in order to handle
a Tuner, three CVBS sources, two Y/C sources, and two
RGB inputs (this in fact means one VIF input for tuner, four
CVBS inputs with among them two Y/C inputs, and two
RGB inputs). The HIP detects by itself whether the source
is Y/C or CVBS, and decides how to handle the signal for
further image processing. For Record Out, the signal is
handled by software: if a P50 SVHS VCR is present and
the signal to be recorded is Y/C, an Y/C signal should be
passed to the VCR.
There are also two inputs for the OTC that will handle
status detection, other, or more detection. In case of RGB,
the fast blanking signal (FBL) determines the break-
through of the RGB1/YPbPr signal if activated beforehand
by the user. If a YPbPr-1fH connection was done, then it is
equally handled by the RGB1 input without using the
internal matrix. The HIP delivers the main video output
(YUV- 1fH signal) for further image processing and three
9.
EN 101
60 Hz
50 Hz
60 Hz
50 Hz
60 Hz
50 Hz
60 Hz
50 Hz
60 Hz
56 Hz

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