ImmediaTV ITV-IP360c, Руководство пользователя

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
For SDI signals, AFD information can be present in the VANC as per SMPTE-2016-3.
This is the primary way of conveying AFD information on a professional video feed.

For SD signals (either from Composite or SD-SDI sources), AFD information can be
synthesized from Wide Screen Signaling (WSS) data present in the VBI (line 20 for
NTSC signals, line 23 for PAL signals).

The IP360 also has the option of inserting a user-defined AFD code (instead of receiving
it from the video input).
The AFD controls are as follows:

Enable AFD: Check this box to enable AFD extraction and insertion. This control is
always available. AFD is inserted in the video elementary stream as per ATSC A/72 and
ETSI TS 101 154.

AFD Source: This controls where the AFD information is coming from. The options
are:
o
Line 20 WSS/Line 23 WSS: This option causes the encoder to synthesize AFD
information from WSS. It is available only if the input resolution is SD or if the
video input settings are auto-detected. It will be displayed as Line 20 for NTSC
and Line 23 for PAL. For PAL inputs, the conversion follows ETSI TS 101 154
Appendix B.4.
o
SMPTE - 2016-3 VANC: This option causes the encoder to extract AFD from the
VANC. It is only available for SDI inputs or if the video input settings are auto-
detected.
o
Manual AFD Selection : This option allows the user to specify a fixed AFD code
to be inserted. Any AFD information received from the input is ignored. This
can be used to override the original AFD information, or when the video is being
scaled (e.g., when the input is HD and is being converted to SD).

AFD Code: This control is displayed only when AFD Source is set to Manual AFD
Selection. It corresponds to the codes listed in SMPTE-2016-1, Table 1.