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EN 138
9.
EM5A NTSC
•
Auto Color. This is saturation control with color features
(TOPIC/Eagle.)
Notes:
•
There is a coupling between the Auto Noise and the Auto
Sharpness algorithm: if noise is present in the video
content, then in general the sharpness will be made less
aggressive. Special care has to be taken to the interaction
of the LIMERIC and the vertical peaking of the PICNIC: an
overly large amount of vertical peaking increases the
visibility of the 2DNR artifacts.
•
Most algorithms are located in the embedded processor of
the PICNIC, because of time-critical calculations, and
because most picture analyzing and correction circuits are
present in the PICNIC. Some parts of the algorithms are
located in the main software, because the outcome needs
to be sent to other I
9.19.2 'Switch On' Behavior
This is the start up sequence:
1. After the power is applied, the 'Standby supply' starts
oscillating, generating the +5V2 (and +3V3.) A reset (POR)
is generated and the OTC is awakened.
2. Next step is the check whether the set needs to be in
'Standby' mode or not. Therefore, the NVM content is read
and the Standby-bit is checked. If the set is to stay in
Standby, there is no further action.
3. If the set will switches 'on', first the degaussing will be
activated (12 seconds.)
4. Meanwhile the MSP is reset and the Standby line is pulled
low, leading to a full semi standby mode (5 V and 8V
switched on)
5. The OTC waits until the +5V and the +8 V are fully present.
Checking the AD-input of the OTC does this. The +5V,
2
+8V, and I
C protection-algorithms are activated.
6. The HOP is instructed via the I
7. Via the SUP-ENABLE signal, the main supply is activated.
The Line Deflection circuitry is supplied now with the V
and the EHT generation can start.
8. During start-up of the deflection, I
disabled for 250 ms to avoid data corruption. If flashes or
spikes are generated during EHT start-up, I
be disturbed or corrupted.
9. After deflection is powered up completely, all the other
protection-algorithms are activated.
10. The black current stabilization loop in the HOP is switched
on. Some extra checking is done to ensure that the loops
are completely stabilized.
11. The OTC sets all the necessary parameters for a correct
sound and image and unblanks the picture.
9.20 Abbreviation List
2DNR
3DNR
AARA
ACI
ADC
AFC
AGC
AM
ANR
Circuit Descriptions and Abbreviation List
2
C devices.
2
C-bus to start the drive.
2
C traffic must be
2
C data could
Spatial (2D) Noise Reduction
Temporal (3D) Noise Reduction
Automatic Aspect Ratio Adaptation:
algorithm that adapts aspect ratio to
remove horizontal black bars; keeps
the original aspect ratio
Automatic Channel Installation:
algorithm that installs TV channels
directly from a cable network by
means of a predefined TXT page
Analog to Digital Converter
Automatic Frequency Control: control
signal used to tune to the correct
frequency
Automatic Gain Control: algorithm that
controls the video input of the feature
box
Amplitude Modulation
Automatic Noise Reduction: one of the
algorithms of Auto TV
AR
Artistic
ASF
ATV
AUDIO_C
AUDIO_L
AUDIO_R
AUDIO_SL
AUDIO-SR
AUDIO_SW
Auto TV
BC-PROT
BG
BLC-INFO
B-SC1-IN
B-SC2-IN
B-TXT
CBA
CC
CL
ComPair
CRT
CSM
CTI
CVBS
CVBS-TER
DAC
DBE
,
BAT
DC-filament
DFU
DNR
DSP
DST
DVD
DYN-FASE-COR
Eagle
EHT
EHT-INFO
EW
EW-DRIVE
EXT
FALCONIC
FBL
FBL-PIP
FBL-TXT
Aspect Ratio: 4 by 3 or 16 by 9
See OTC 2.5: main processor
Auto Screen Fit: algorithm that adapts
aspect ratio to remove horizontal black
bars without discarding video
information
See Auto TV
AUDIO Center
AUDIO Left
AUDIO Right
AUDIO Surround Left
AUDIO Surround Right
AUDIO SubWoofer
A hardware and software control
system that measures picture content,
and adapts image parameters in a
dynamic way
PROTection signal to the µP for a too
high Beam Current.
System B and G
BLack Current INFO
Blue SCART1 IN
Blue SCART2 IN
Blue TeleteXT
Circuit Board Assembly (PCB)
Closed Caption
Constant Level: audio output to
connect with an external amplifier
Computer aided rePair
Cathode Ray Tube or picture tube
Customer Service Mode
Color Transient Improvement:
manipulates steepness of chroma
transients
Composite Video Blanking and
Synchronization
CVBS TERrestrial
Digital to Analog Converter
Dynamic Bass Enhancement: extra
low frequency amplification
Filament supply voltage
Directions For Use: owner's manual
Digital Noise Reduction: noise
reduction feature of the set
Digital Signal Processing
Dealer Service Tool: special remote
control designed for service
technicians
Digital Video Disc
DYNamic phASE CORrection:
corrects the phase of the H-drive
Feature box IC performing peaking,
zooming and sub pixel LTI in both
horizontal and vertical directions, CTI,
and other color features
Extra High Tension
Extra High Tension INFOrmation,
used for contrast reduction, vertical
and horizontal amplitude correction,
beam current protection, and flash
detection.
East West, related to horizontal
deflection of the set
The drive signal for the EW transistor
EXTernal (source), entering the set by
SCART or by cinches (jacks)
SAA4992H, feature box IC which
performs Digital Natural Motion, 3DNR
vertical zoom, and vertical peaking
Fast BLanking: DC signal
accompanying RGB signals
The Fast BLanking signal for PIP
The Fast BLanking signal for TXT. It
has a higher priority than FBL-PIP
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