SELENIO™ SEL‐1DEC1/SEL‐1DEC2
Installation and Operation Manual
VANC Processing
© 2014 Imagine Communications Corp. Proprietary and Confidential.
Version 7.0 | Page 34
converting between interlaced and progressive, VANC data on the two source fields is mapped to the
two corresponding frames of the progressive signal (or vice‐versa). However, there is an exception for
Closed Captioning (CC): during progressive‐to‐interlaced conversion, CC is mapped only on field 1.
If the VANC data destined to an individual line does not fit because the target resolution is smaller, extra
VANC packets are placed in the next available empty line, if possible. If the selected line does not match
the available line, or there is not enough space for VANC data, an alarm is raised. When the source is
1080p, VANC on lines 21‐40 will be re‐mapped into lines 8‐20 wherever space is available.
HD‐SDI to SD‐SDI
The DEC1 and DEC2 support HD‐to‐SD data cross‐conversion if it is sourced from PUD. RDD11 and
SMPTE2038 are not supported.
If the target standard is SD‐SDI, VBI data is present (in EN 300 472 or EN 301 775 format), and lines
configured for VBI pass‐through are filled with VBI data if present in the VBI input. Teletext is output as
VBI, not VANC. AFD and SCTE‐104 may be outputted in SD in VANC format. SD‐SDI formats support
VANC insertion of only AFD and Bar data, SCTE‐104, KLV, and audio metadata.
SD‐SDI to HD‐SDI
For SD‐ to HD‐SDI crossconversion, teletext will be inserted into VANC, according to OP‐47 or SMPTE
2031.
The SD‐SDI VBI data from PES (EN 301 775 or SCTE 127) may be cross‐converted to HD VANC in
SMPTE2031 data format.
