Data bridging of native material on hd/sd models, Data bridging of native, Appendix a specifications – Grass Valley K2 Media Client System Guide Oct.10 2006 User Manual
Page 134
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K2 Media Client System Guide
September 7, 2006
Appendix A Specifications
Data bridging of native material on HD/SD models
When MPEG-2 material that was recorded on a HD/SD model is converted on a HD/
SD model, data is bridged as follows:
Source
format
Source
data
Conversion
Converted
format
Converted
data
SD
525 line
Closed-captioning (CC) on
line 21 (EIA-608) can be
stored as UserData CC
packets
a
or UserData VBI
Line21 (Uncompressed VBI
Line21)
a
UserData CC packets always on. If CC exists, it is recorded and played back.
Up-convert
HD
Ancillary Closed Caption EIA-708-B packets
SD
625 line
Teletext on line 21
No up conversion to HD
SD
625 line
525 line
Ancillary data
No up conversion to HD
HD
EIA-708 & 608 Ancillary
data packets
Down-convert
SD
Closed-captioning on line 21 (EIA-608
standard).
HD
Teletext
No down conversion to SD
HD
1080i
Ancillary data
Cross-convert
HD
720p
Moved to valid lines
HD
720p
Ancillary data
Cross-convert
HD
1080i
Moved to valid lines. Any data on lines 21-25
is moved to line 20 on 1080i output.