System composition and working principle
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2
channels ASI input interface
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The input
can accord with the 2 channels ASI Inputs with DVB standards. The
signal is a multi-program
or single
program transport stream. After warm backup, it can input needed
and useful data, which
means it can
filter the empty and needless data.
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2
channels ASI output interface
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The ASI
interface with DVB standard is applied in the data output after
scrambling to output the TS
stream which
is a multi-program or single program transport stream through
scrambling.
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Working principle
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The
Independent Scrambler receives multi-program or single program
transport stream according with
 the
DVB demands, and then filters the empty packets and gets rid of the
needless packet, and if
necessary,
resets the identification mark of packet to provide the related
program information for
follow-up
processing. Take and process any received program specific
information and service
information,
and only scramble for the each useful program.
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Main
features
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â—Support
scrambling of maximum *3 services.Â
â—The maximum output rate is *0Mbps.
â—Support
huge buffer memory, and resist the unexpected code stream.
â—Support maximum **6Mbps of ASI input data
channel.
â—With
Ethernet interface, the configuration parameters of the scrambler
can be controlled remotely
through
Network Manager to monitor the operating
condition in real time.
â—Support
the high accuracy PCRÂ correction function.
â—Auto-Fill
empty package and keep constant output code rate.
â—Auto
Identifying the packet format (**8/**4 bytes).
â—Use LED,
monitor the system situation and set the system parameter in
real time.
â—With the
function of remembering the state and parameter when lose of power
supply.
