Filters are employed within the AVP 4000 used to control the unit when presented
with a VBR input stream. These filters have long settling times which may result in
PCR accuracy errors for the first 10 minutes after locking onto the input stream.
B.3.4 Power Consumption
The option cards do not exceed the following total power requirements.
Table B.6 Option Card Power Consumption Specification
Item Specification
Power Consumption EI9001 does not exceed 80 Watts.
EI9001T does not exceed 90 Watts.
Heat Dissipation
All VCM modules have been thermally modelled to minimize any potential
issues with heat dissipation.
B.3.5 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).
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 repacketize the data carried in the HANC or VANC based on the ANC
data type.
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.
Time Code
Time code is extracted from HANC of the incoming video and carried in the
Transport Stream sequence header for MPEG-2 or in a SEI message for H.264.
OP-47
Teletext subtitles can be extracted from ANC in accordance with OP-47 and carried
in a Teletext PID.
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