Ross TES9, Руководство пользователя программного обеспечения

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1–2 • Introduction TES9 Software User Manual (Iss. 04)
Data Distribution Overview
The TES9 is part of a system that allows data to be inserted into the VANC (Vertical Ancillary)
area of one or two SMPTE 292M or 259M video signals for distribution over a video network.
This method of data embedding ensures that the data follows the video signal wherever it is
routed. Eventually, the video signal reaches a location where the data is extracted and processed.
The TES9 family is comprised of two models. One model supports a single video stream. The
other model supports two video streams.
The TES9 can be used to add the data to the digital video stream, or extract it, or both. Figure 1.1
shows the flow of video and data through the TES9. This shows that each channel is equipped
with a VANC/VBI decoder that provides extracted data to the CPU, and a VANC/VBI encoder
that accepts data from the CPU for insertion into the video. The CPU also has access to a variety
of standard data ports: RS-232, LAN and modem.
These facilities allow the TES9 to perform a number of functions:
• Inserting data received from one or more of the data ports into the video. This is normally
called “encoding”, “inserting” or “embedding”.
• Extracting data from the video and forwarding it to one or more data ports. This is
normally called “decoding”, “extracting” or “disembedding”.
• Inserting data extracted from one video signal into the other. This is called “bridging”.
It should be noted that the TES9 is designed to be primarily a VANC encoder/decoder. For this
reason, its use of VBI data is limited the Bridging module, which allows WST data from a
SMPTE 259 video signal to be bridged to VANC data in a SMPTE 292 video signal, or vice
versa.
Figure 1.1 Simplified Dataflow Diagram
Figure 1.2 shows the pieces of equipment involved in a simple data distribution system. Each of
the pieces in this system is described briefly in the following sections. For clarity, only one video
signal and one data stream are used in this example.
Note
— On some models of TES9, the two video channels may be labeled “PROGRAM”
and “AUXILIARY”, instead of “PROGRAM 1" and “PROGRAM 2", respectively. Their
functions are nevertheless identical.
PGM 1
IN
DESERIALIZE
DESERIALIZE
PGM 2
IN
CPU
Video
Data
Legend
10/100
base-T LAN
MODEM
RS-232
VANC/VBI
DECODE
VANC/VBI
DECODE
PGM 1
OUT
SERIALIZE
VANC/VBI
ENCODE
PGM 2
OUT
SERIALIZE
VANC/VBI
ENCODE