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IQBRK00/01
B12
IQBRK00OPS 05/04/07
www.snellwilcox.com
Version 1 Issue 6
B12.23
VBI & HANC Blank(ing)
This item allows the Vertical Interval data (all or
specific lines) contained in the input signal to be
blanked or passed through the module.
It allows the selection of which vertical interval
lines to pass through to the output and which lines
to blank.
525 Pass
This section allows lines 11 to 21 and lines 274 to
283 of 525 line signals to be selected and passed
through to the output by checking the appropriate
box.
625 Pass
This section allows lines 7 to 23 and lines 320 to
335 of 625 line signals to be selected and passed
through to the output by checking the appropriate
box.
All
This section allows all vertical interval lines to be
selected and either passed to or blanked from the
output signal.
Selecting this item will select all vertical interval
lines in the 525 line list and allow them to passed
through to the output.
Selecting this item will select all vertical interval
lines in the 625 line list and allow them to passed
through to the output.
Selecting this item will select all vertical interval
lines in the 525 line list and blank them from the
output.
Selecting this item will select all vertical interval
lines in the 625 line list and blank them from the
output.
Hanc Blank
When checked all horizontal data will be blanked,
on the input. When unselected, passthrough
operations will not alter audio packets for groups
that the IQBRK00 has not selected for embedding.
In order to allow minimum synchronization delay
the created packets are output first and then the
passthrough groups are placed after the created
streams have been embedded. This means that
passthrough is achieved without altering the input
packet distribution. Passthrough operation has to
take note of marked for deletion packets and these
are removed where possible to ensure that one
does not run out of useable ancillary space.
For details of the HANC Data Handling please
refer to Appendix 2 on page 79.
V Flag (OBD)
This control allows the V(ertical) Flag to be
changed from line 10 (OVD, Optional Video Data)
to line 20 (OBD, Optional Blanking Data).
Unchecked selects OVD and checked selects
OBD. The default is OVD selected.
Note that this function is only active for 525 line
signals.