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Advanced Tab – VBI/Ancillary Data Insertion
The 9223 can extract the following data types from the video input and insert them in the
compressed video output:
• Closed Captioning
• Active Format Description (AFD)
• SCTE 104 Ad Insertion Triggers
Closed Captioning
The Closed Captioning controls are only displayed if Field/Frame Rate in the Basic Tab –
Video Configuration is set to NTSC. The appearance of this control is also a function of the
Input Resolution and Input Source parameters, as depicted below.
The Closed Captioning controls are as follows:
• Enable CC: check this box to enable Closed-Captioning insertion. Closed Captions are
inserted in the video elementary stream, as per ATSC A/72. Both CEA-608 and
CEA-708 captions are supported.
• CC Source: this controls where the encoder extracts closed captions from. As depicted
below, this field may or may not be editable, depending on the input resolution and input
source. The options are:
o CEA-608 Line 21: this option can only be used for SD inputs. The encoder will
extract all the CEA-608 information from both fields of Line 21, if present.
o SMPTE-334 VANC: this option can only be used for SDI inputs. The encoder
will expect closed-captioning information in the VANC. Both CEA-608 and
CEA-708 modes are supported (and automatically detected).
Note that if Video Input Settings is set to Auto Detected, the encoder will comply with the CC
Source if possible, but may fall back to another setting depending on the input signal. For
example, if CC Source is set to CEA-608 Line 21 and the encoder detects an HD signal, it will
fall back to SMPTE-334 VANC. Conversely, if it is set to SMPTE-334 VANC and it detects a
composite signal, it will fall back to CEA-608 Line 21 if that composite signal is NTSC, or turn
off CC if that composite signal is PAL.
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9223-OM (V2.5.0)
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