Cobalt-digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder Manuel d'utilisateur télécharger pdf (Page 36)

36 9223-OM (V2.0)

Active Format Description

The 9223 can extract Active Format Description (AFD) information from the incoming video

signal and insert it in the compressed bitstream. AFD information can be extracted from the

following sources:

• 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 9223 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. 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.

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

Closed-Captioning Disabled

Input Source: SD-SDI

Input Resolution: SD

Input Source: Composite

Input Resolution: SD

Input Source: HD-SDI or 3G-SDI

Input Resolution: HD

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Cobalt-digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder Manuel d'utilisateur Page 36