Ericsson AVP 1000 Reference Manual page 345

6.9.5 Analogue Input (CE-xA)
The CE-xA option card provides two stereo analogue audio inputs through the 15-
pin D-Type Audio connector. The inputs can be balanced or unbalanced with an
input impedance of 20 kΩ.
6.10 Vertical Blanking Interval (VBI) and Ancillary (ANC) Data
The video stream ingested through the SDI/HD-SDI input on the VCM can carry
additional data associated with the video stream. These data are either inserted in
the horizontal or vertical blanking region (ANC) or in the non-active television lines
(VBI).
6.10.1 Ancillary Data
There are two positions in the video stream where ANC packets are allowed. The
first is the horizontal blanking interval of the video line, called the horizontal ANC
space (HANC). The second is the active portion of the video lines in the vertical
blanking interval, called the vertical ANC space (VANC). HANC and CANC of the
SDI signal can carry specific ancillary (ANC) data. The encoder then can be set up
to extract and re-packetize the data carried in the HANC or VANC based on the
ANC data type.
6.10.1.1 Closed Captions
Closed Caption data and any user data embedded in the SDI/HD-SDI according to
SMPTE 334, is extracted and inserted into the picture user data of the video stream
in accordance with ATSC A/72 part 1.
Information regarding the closed captions is carried in PSI as per ATSC A/72 part 2.
6.10.1.2 Time Code
Time code is extracted from HANC of the incoming video and carried in the
transport stream adaptation layer as described in Annex E of ETSI TS 101 154
(AU_information).
6.10.1.3 OP-47
Teletext subtitles can be extracted from ANC in accordance with OP-47 and carried
in a Teletext PID.
6.10.1.4 AFD
As part of the ANC Data, Active Format Description codes can also be transmitted.
These codes provide information to video devices about where in the coded picture
the active video is. The codes are defined by ETSI TS 101 154 V1.7.1 Annex B,
ATSC A/53 Part 4 and SMPTE 2016-1-2007.
EN/LZT 790 0023/1 R16A
Advanced Video Processing and Networking
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