Data bridging of VBI information on K2 Summit system HD channels
On channels with the XDP (HD) license, 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 UserData1 CC packets or UserData VBI Line21 (Uncompressed VBI Line21) | Up-convert | HD | Ancillary Closed Caption EIA-708-B packets |
EIA-708 | Up-convert | HD | EIA-708 | |
SD 625 line | Teletext (except as below) | No up-conversion to HD | ||
5 lines of VBI Teletext in OP-47 packets | Up-convert | HD | OP-47 ancillary data packet in SD data track file. SD Teletext is in ancillary data location as specified in OP-47 packet. | |
SD
625 line 525 line |
Ancillary data | Up-convert | HD | Moved to valid lines |
HD | EIA-708 & 608 Ancillary data packets | Down-convert | SD | Closed-captioning on line 21 (EIA-608 standard). |
HD | Teletext as OP-47 packets | Down-convert | SD | Output as VBI waveforms on lines specified in OP-47 packet or as specified by "Teletext Output Lines" data track settings in AppCenter Configuration Manager. |
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. |
1 UserData CC packets always on. If CC exists, it is
recorded and played back. MPEG UserData can be played out but not
recorded.