Operation Manual

Advanced Tab – VBI/Ancillary Data Insertion

The B264 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 in the following situations:

 In the Basic Tab – Video Configuration, Video Input Settings is set to Manual

Selection, and Frame/Field Rate is set to 59.94 (NTSC).

 In the Basic Tab – Video Configuration, Video Input Settings is set to Auto Detected.

The appearance of this control is also a function of the Video Input Settings, 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 video input settings, 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.