Circuit Descriptions, Abbreviation List, and IC Data SheetsLC4.7E AA9.EN 65
9.6Video: TV Part (diagrams A1, A2, and A3)PC (VGA) input
The VGA input is processed by the VGA block of the Scaler.
The Scaler supports pixel frequencies up to 165MHz.
The video processing is completely handled by the Hercules
YpbPr format is also supported via the VGA interface and
?IF demodulator.
covers resolutions of 480p/560p/720p/1080i.
?Chrominance decoder
?Sync separator.
?Horizontal & vertical drive.9.7.3 Output
?RGB processing.
?CVBS and SVHS source select. The Display Output Port provides data and control signals that
permit the Scaler to connect to a variety of display devices
It has also build in features like:using a TTL or LVDS interface. The output interface is
?CTI.configurable for single or dual wide TTL/LVDS in 18, 24 or 30-
?Black stretch.bit RGB pixels format. All display data and timing signals are
?Blue stretch.synchronous with the DCLK output clock. The integrated LVDS
?White stretch.transmitter is programmable to allow the data and control
?Slow start up.signals to be mapped into any sequence depending on the
?Dynamic skin tone correction etc.specified receiver format.
Further, it also incorporates sound IF traps and filters, and
9.8Audio Processing
requires only one crystal for all systems.
9.6.1 Histogram (YUV picture improvement) ICHercules
AUDIO-LSL
The demodulated video-signal can be checked on pins 74, 75, SIFAUDIO-LSR2xSIF InputAmplifier2x StereoSpeaker
Tuner
FM
and 76 of IC7011 and is fed to pins 70, 71, and 72. In this path, SSIF Input
the Histogram IC TDA9171 is inserted. AV1 in
*AP/USA/LatamAUDIO-IN5L
This TDA9178 can control various picture improvements: Constant Level OutAUDIO-IN5R*Europe only
SCART1 in
?Histogram processing. *Europe only
?Colour transient improvement.Is used on the DMMIAmplifierHeadphone
=> No SCART2/AV2 forAV2 inFor iTV only
?Luminance transient improvement.Bolt-on*AP/USA/LatamAUDIO-IN3L
AUDIO-IN3R
?Black and white stretch.SCART2 inMonitor out*Europe only* Not available
AUDIO-OUTHPL
AUDIO-OUTHPR
?Skin tone correction.Side inSCART2 outAUDIOI-N4L*Europe only
AUDIO-IN4R
?Green enhancement.*All region
HEF4053
?Blue stretch.PC in3X SPDTAUDIO-OUTSLSCART1 out
AUDIO-IN2LAUDIO-OUTSR*Europe only
?Smart peaking.AUDIO-IN2R
?Video dependent coring.HDMII2SDAC
?Colour dependent stretching.PC_HDMI_AUD_SELP0.0/I2SDO1 106
(From Scaler,
GPIO_G07_B0)
Lip Sync
Circuit
P0.0/I2SDI1105
Since the TDA9171 is connected to the Hercules, picture 103
P0.3/I2SCLKE_14490_061.eps
improvement works only for signals that are routed through the 130804
Hercules and not for signals directly connected to the Scaler.
Figure 9-3 Block diagram audio processing
9.7Video: Scaler Part (diagram A7 and A13)
The audio decoding is done entirely via the Hercules. The IF
output from the Tuner is fed directly to either the Video-IF or the
The Genesis GM1501 Scaler is a dual channel graphics and Sound-IF input depending on the type of concept chosen.
video processing IC for flat monitors and televisions There are mainly two types of decoder in the Hercules, an
incorporating Picture in Picture, up to SXGA output resolutions. analogue decoder that decodes only Mono, regardless of any
The Scaler controls the display processing in a FTV, e.g. like standards, and a digital decoder (or DEMDEC) that can decode
the deflection circuit in a CRT-based TV. It controls all the view both Mono and Stereo, again regardless of any standards.
modes (e.g. like "zooming" and "shifting"). Features like PC
(VGA) or HD inputs, are also handled by this part. In this chassis, the analogue decoder is used in two cases:
?It is used for AM Sound demodulation in the Europe
9.7.1 FeaturesSECAM LL? transmission.
?It is used for all FM demodulation in AV-Stereo sets.
The Scaler provides several key IC functions:
?Scaling.9.8.1 Diversity
?Auto-configuration/ Auto-Detection.
?Various Input Ports:The diversity for the Audio decoding can be broken up into two
- Analog RGB. main concepts:
- Video Graphics.?The Quasi Split Sound concept used in Europe and some
?Integrated LVDS Transmitter.AP sets.
?On-chip Micro-controller?The Inter Carrier concept, used in NAFTA and LATAM.
The UOC-III family makes no difference anymore between
9.7.2 InputsQSS- and Intercarrier IF, nearly all types are software-
switchable between the two SAW-filter constructions.
Analog RGB
Simple data settings are required for the set to determine
The RGB input is fed to pins B2, C2 and D2. This input consists
whether it is using the Inter Carrier or the QSS concept. These
of either the Hercules RGB output or the RGB/YpbPr input of
settings are done via the ?QSS? and ?FMI? bit found in SAM
the VGA connector. The Scaler can switch between the two
signals via the PC_HD_SEL signal and selection IC SM5301. mode. Due to the diversity involved, the data for the 2 bits are
being placed in the NVM location and it is required to write once
during startup. |
ACEC
PHILIPS
