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EN 222
9.
FJ3.0E LA
Tuner diversity
The SSB can be equipped with two tuners: the main tuner
TD1316AF and the sub tuner UV1318ST. The main tuner can
receive digital and analogue signals, whereas the sub tuner
can only receive analogue signals. Some sets are only
equipped with an analogue tuner. Refer to chapter 9.3 "Front-
End" for details.
Analogue Reception
The TV receives multimedia information by tuning to one of
many 6 MHz input channels available via a cable connection.
When the input channel is an analogue channel, the signal is
processed via the PAL/SECAM decoder and the VBI data
decoder.
Digital Reception
The CI module consists of the following functional blocks:
Conditional Access Module (CAM), Out of Band part, and
buffering. These blocks are interfacing with the DVB-T In Band
(IB) channel decoder and Out of Band (OOB) channel decoder.
The interface is connected to the VIPER. Also the Common
Interface outgoing Transport Stream (TS) is routed to the
VIPER.
The TV receives multimedia information by tuning to one of
many 6 MHz input channels available via a cable connection.
When the input channel is a digital channel, it is processed via
the QAM demodulator and then passed to the Common
Interface device (CI) where secure and scrambled information
is processed. Non-scrambled information is passed through
the CAM to the MPEG-2 Transport Demultiplexer. When the
CAM is not inserted, the output of the QAM demodulator is
routed directly to the MPEG-2 Transport Demultiplexer. The
multi-media processor (VIPER) handles the synchronization
and display of audio-visual material.
9.1.3
SSB Cell Layout
DC / DC & CONV
COMMON INTERFACE
Circuit Descriptions, Abbreviation List, and IC Data Sheets
USB
SIGNAL PROCESSING
I/O
ETHER
HDMI
NET
Figure 9-2 SSB top view
The OpenCable Host Device also receives control information
and other data by tuning to an Out-Of-Band (OOB) Forward
Data Channel (FDC) channel. The terminal will remain tuned to
the OOB Forward Data Channel (own tuner) to continuously
receive information. This information is passed to the CAM for
processing, and relevant information is passed back to the TV.
Signal Processing
The AVIP together with the MPIF device is used to perform the
input decoding of a single stream of analogue audio and video
broadcast signals. In addition, the AVIP is used for decoding
and presentation of audio output streams. The main data
connection between MPIF and AVIP is done via an I
The AVIP converts the incoming video data to ITU-656 format
for communication to the VIPER IC. The audio data is
transferred between the AVIP and VIPER using I
The AVIP IC is controlled by the VIPER via the I
The key part in the system, the VIPER, performs almost all key
features, like video quality enhancement, motion
compensation, picture-in-picture processing, and others. It is a
completely digital IC with a TriMedia DSP (Digital Signal
Processor) core and a MIPS microcontroller core. The DSP
and some additional cores are used to do the video feature
processing and some auxiliary sound feature processing. The
MIPS microcontroller core is used for all internal and external
controlling tasks including a system wide I
The VIPER provides a primary digital (YUV or RGB) output to
the Pacific 3, which on his turn processes the data to the LVDS
transmitter. For models with the AmbiLight feature, an FPGA is
connected between VIPER output and LVDS Transmitter input.
This FPGA (or EPLD or MOP) is used for the AmbiLight
processing and some picture enhancements.
LVDS
SUB
MPIF
MAIN
MPIF
HDMI
AUDIO
PC-VGA
2
S.
2
C bus.
2
C bus.
AUDIO CLASS D
TUNER
DVB-T/ATSC
(MAIN TUNER)
TUNER
ANALOG
TUNER
(SUB TUNER
& SPLITTER)
G_15990_120.eps
180706
2
D bus.
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