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TES9 Software User Manual (Iss. 04)
Captioning Module • 5–7
708 Output Port Tab
The 708 Output Port is used to capture data from the input video (before any new caption material
is encoded into the signal) and send it out a port. Normally this would be used to bridge data from
the 292 video to an ATSC multiplexer. The port is selected in the same way as for the Primary
Captioning Port.
708 Output Port Tab
Protocol
This parameter specifies the protocol to be used to send the DTVCC caption data out the
specified port, normally a serial port. The Push protocol refers to the “Grand Alliance” protocol,
where the caption data is sent to the MPEG encoder without checking for acknowledgments.
SMPTE 333M has the title “DTV Closed-Caption Server to Encoder Interface”. In this case the
TES9 is acting as a DTV Closed-Caption Server.
Frame Delay
This field specifies the number of video frames to delay before sending the data to an ATSC
multiplexer. The purpose of this is to account for delays in the MPEG encoding of the video
channel (relative to the caption data channel) to allow the video and caption data to be
synchronized at the final destination.
608 Output Port Tab
The 608 Output Port is used to capture the 608 embedded data from the 708 caption stream of the
input data of the TES9 before any new data is embedded into the signal. The 608 caption data is
output using Ross Video’s “Field Marked” protocol, which refers to the format of data expected
by the TES3, TES5 or TES9 when the Input Mode is set to Field Marked. Data is sent in groups
of 3 bytes, as shown below.
The Field Marked protocol allows standard-definition CEA-608 caption data embedded within
CEA-708 in a SMPTE 292M signal to be decoded and sent to a TES3 or TES5 to be inserted into
an analog or SMPTE 259M serial digital video signal, respectively.
Note
— The two protocols supported for 708 output require output to be on a serial port
with specific settings. You must match the settings of the ATSC multiplexer for the
connection to work.
Table 5.1 608 Output Port Data
Format
Description
0x81 {byte1} {byte2}
2 bytes of NTSC field 1 data
0x82 {byte1} {byte2}
2 bytes of NTSC field 2 data
0x11 0x80 0x80
Caption packet was received
with no NTSC field 1 data
0x12 0x80 0x80
Caption packet was received
with no NTSC field 2 data
Содержание TES9
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Страница 14: ...1 6 Introduction TES9 Software User Manual Iss 04 ...
Страница 26: ...3 10 Encoder Configuration TES9 Software User Manual Iss 04 ...
Страница 67: ...Notes ...