Table of Contents
Advertisement
•
Two RGB inputs and two status-inputs.
The input signals from the Front I/O are fed to the HIP, and front
detection is fed to the OTC.
•
EXT1 is full SCART: thus CVBS and RGB/YUV. The RGB-
selection is done in the HIP.
•
EXT2 is meant for VCR and has therefore some additional
signals in relation to EXT1 but no RGB. EXT2 has also the
possibility for Y/C_in and Easylink-Plus (P50). Y_in is with
pin 20 and Chroma_in with pin 15. Easylink is handled via
pin 10 of the SCART and this is a bi-directional
communication.
•
EXT3 is meant for RGB and CVBS input only.
9.6.2
Outputs
One can select three, separate switchable, outputs:
•
One YUV-output, which is fed to the PICNIC.
•
Two CVBS outputs, one for Teletext Dual Screen, and the
other for output to EXT2 to have WYSIWYR (What You
See Is What You Record).
9.6.3
I/O Switching
The external signals are fed directly to the I/O part of the HIP
with status from pin 8 of SCART. On the HIP, there are two
status inputs available (pins 15, 17) with two voltage levels:
4:3 -> 2.2 V.
16:9 -> 5.5 V.
9.6.4
P50
EasyLink features are based on the 'one touch operation'
approach. This means that a sequence of actions are executed
at the same time in both the television and the video cassette
recorder, provided both are fitted with the EasyLink function
and connected with the eurocable supplied with your video
recorder.
Easylink (P50.1) supports the next features:
•
Signal quality and aspect ratio matching.
•
One touch play.
•
One touch text.
•
Pre-set download.
•
WYSIWYR.
•
Automatic Standby.
With Easylink-Plus (P50.2) is added:
•
Country and language installation.
•
System Standby.
•
NexTView download.
•
Timer record control.
•
VCR control feature.
Cinemalink (P50.3)
Cinema Link is a new Philips feature in which the TV, the audio
receiver, and other video peripherals like DVD player and video
recorder communicate with each other (on condition they all
are equipped with the Cinema Link functionality and are
connected via a SCART cable). They automatically offer the
highest quality combination of picture and multi channel
surround sound to create your own Home Cinema.
With one key on the remote control, with which you can control
all Cinema Link products, your total Cinema Link system will be
started and the DVD or video recorder will start to play and the
audio receiver will provide the sound (on the condition Cinema
link is enabled) on behalf of the TV.
The TV can function as the centre speaker of your system,
making a separate centre speaker unnecessary.
By pressing the standby key on the remote control for at least
3 seconds, the complete Cinema Link system will be switched
to standby.
Circuit Descriptions and Abbreviation List
EM5E
9.6.5
Video Processing
The sandcastle-pulse, created by the HIP, is not used for
synchronisation (only for the Comb filter). The HOP will
generate synchronisation signals derived from the feature box
(PICNIC, pin 60 and 61) signals.
If a VCR is connected, there is also an automatic correction for
MacroVision (r). This is active for the external sources and the
pre-sets 0, 90-99.
The HIP itself (no external voltage) controls the Y/C switch in
the HIP.
The chrominance decoder in the HIP is full multi-standard:
PAL/SECAM/NTSC.
Different crystals can be connected to the pins 54 to 57 without
any alignment. The crystals are also used as a reference for the
synchronisation. A digital control circuit that is locked to the
reference signal of the colour decoder determines the start-up
of the sync.
Note: You may only replace these crystals by the original ones.
If just a crystal is taken, the internal capacitance will be different
and the effect will be that there is no colour.
In the HIP a sync separation circuit is integrated; the HIP
delivers the H
and V
A50
9.7
Video: Feature Box 7 (Diagram L)
The objective for this chassis was, to reach a sharper picture
by means of a higher definition.
This is achieved via the so-called 'Pixel Plus' feature. So, what
exactly is Pixel Plus?
9.7.1
Introduction
The basic function of the Feature box (FBX) is picture
improvement, and depending on the version, several scan
conversion methods are possible. The PICNIC (SAA4978H) is
the central key component.
In the EM5E-chassis, the feature-box is integrated on the SSB.
In the Feature Box 7 (FBX7), a new IC is used, called the
'Eagle'. This IC does the following picture improvements:
•
Horizontal: increases from 840 to 1680 pixels per line (the
number of pixels is doubled per line). This, by itself, does
not mean an improvement in definition however. To
achieve that, the new pixels are digitally processed inside
the Eagle with Luminance Transient Improvement (LTI)
and Peaking. This will give the new pixels extra picture
information, which results in steeper slopes and contrast
improvement at details.
•
Vertical: increases from 625 lines (PAL) to 833 lines. Also,
those new lines are processed inside the Eagle with LTI
and Peaking, again resulting in lines with extra picture
information.
•
The line frequency is fixed on 31250 Hz and the frame
frequency at 75 Hz (this will give no frame-flicker). In
addition, other modes, like 'Digital Scan' are still possible.
•
The colour enhancement features of the TOPIC are done
by the Eagle.
9.
EN 111
to the PICNIC.
A50
Hide quick links:
Advertisement
Table of Contents
