Using the Equipment
3.17.1.6.3 VANC > SDP (OP-47 Teletext Subtitles)
The RX8200 can extract Subtitling Distribution Packets (SDP) from VANC PES and
insert these packets in to the VANC space of the HD-SDI output. SDP is known as
OP-47 Closed Caption/Subtitling data in the Vertical Ancillary space as per the Free
TV Australia Operational Practice OP-47 Specifications.
These packets are also known as VANC WST (World System Teletext) packets and
have DID = 0x43 and SDID = 0x02.
The RX8200 is capable of parsing Teletext PES packets that carry EBU Teletext
Subtitle data and convert in to SDP for insertion.
Figure 3.131 Decode > VBI-VANC > VANC > SDP
• Stream Status – Displays the presence of Subtitling Distribution packets (SDP)
in the incoming Teletext PES stream or VANC PES stream.
• Output Status – Displays the presence of SDP (OP47 Closed Captions/
Subtitling data) being output to the VANC space.
• SDP Insertion – This menu enables or disables the insertion of the SDP into the
VANC space of the HD-SDI output.
• SDP Insertion Line – Allows the user to select AS INPUT, or a specific Line
Number in the range 9 to 20. Where SDP is converted from Teletext data, this
field specifies the Line Number it should be inserted to on the output.
- AS INPUT – Uses the same Line Number specified from the source data.
- 9 to 20 – Overrides the source Line Number and outputs to the Line Number
specified here.
• SDP Insertion Field – Allows the user to select AS INPUT or a specific Video
Field. This control allows the user to manage how SDP data is inserted into the
HD-SDI VANC. It is useful when cross converting an interlaced source into a
progressive output, e.g. 1080i > 720p.
- AS INPUT – Uses the field as determined by the source data
- FIELD 0 – forces SDP insertion into video field 0
- FIELD 1 – forces SDP insertion into video field 1
3.17.1.6.4 VANC > MULTI
The VANC Multi packet is for the carriage of a combination of subtitling packets and
other ancillary data such as WSS data packets. VANC Multi packets have a DID
value of 0x43 and a SDID value of 0x03. SDP may be carried as an inner packet
within the VANC Multi packet.
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