LC2000/LC2000-IQ/LC4000/LC4000-IQ
RollCall Control Panel Channel Operation Screens
Issue 1 Rev 6
Page 139
© 2015 SAM
11.5.9.3
L23 (ETSI EN 300 294 v1.4.1)
The L23 Config controls define how the output ETSI EN 300 294 signaling is configured. This
signaling format is generally referred to as WSS or Line 23 (L23), as this is the default line
used to carry this signal in 625. WSS is only valid for 625 output video formats and is only
supported for 625 output video format.
WSS signaling supports two output formats: ETSI EN 300 294, and a non-standard variant of
ETSI EN 300 294.
•
Mode:
Output options.
•
Auto:
If Output Format is set to ETSI, Auto generates an output WSS signal
conforming to ETSI EN 300 294, with AFD codes that match the output aspect of
the ARC. If Output Format is set to AFD, Auto generates an output WSS signal
conforming to L23, with scanning system information and AFD codes that match
the output aspect of the ARC.
•
Pass:
When either L23 ETSI or L23 AFD is selected as the input signaling
source, any valid ETSI EN 300 294 input signal is passed through to the output
unchanged irrespective of what output format is set. For both output formats, the
output signal may not represent the actual aspect of the output image. If no WSS
signal is present at the input, then no WSS signal will be output.
•
Force:
When Output Format is set to ETSI, Force generates an output ETSI EN
300 294 signal with AFD codes that match what is selected in the Force Mode
Config – ETSI list. The list contains eight AFD codes.
When Output Format is set to AFD, Force generates an output ETSI EN 300 294
signal that is modified to carry VI scanning system information and AFD codes
that match what is selected in the Force Mode Config – AFD list. The list contains
eight AFD codes for scanning 4:3 system information, and eight AFD codes for
scanning 16:9 system information. The actual scanning system information used
will always be 625, as WSS is only supported in 625 video output.
•
Delete:
Disables embedding of ETSI EN 300 294 output signaling in the output
video.
•
Output Format:
Inserts L23 information in either AFD or ETSI format.
•
ETSI:
Generates output WSS signaling conforming to ETSI EN 300 294, carrying
just the AFD codes relating to the output aspect of the ARC.
•
AFD:
Generates output WSS signaling conforming to ETSI EN 300 294;
however, payload of the signal has alternative meaning: it has been modified to
carry Video Index Scanning system information and AFD codes relating to the
output aspect of the ARC. (This specification was originally generated as L23
spec by several major UK broadcasters and manufacturers. It has never been
released as an official standard.)
•
Input Line:
WSS information is generally carried in the fist half of line 23; however, if
the information is required on a different line, use the slider to specify the line on
which it is carried in the input. The range is from line 10 to line 23 in one-line steps.
Note: ETSI EN 300 294 signaling will only be extracted from this line number if the
video input format is 625.
