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Compressed VBI import specifications

The compressed VBI import is supported as follows:

  • SD MPEG only.
  • All forms of import are supported, such as FTP, automation protocols, AppCenter, Capture services, and InSync.
  • GXF, MXF, MPEG, and MOV imports extract closed captioning from SD 720x512 video.
  • D-10/IMX SD MPEG video is supported
  • SD 525 line (NTSC) closed captioning is supported
  • SD 625 line (PAL) teletext is not supported
  • The first SD video track encountered is processed for compressed VBI. Multiple video tracks are not processed.
  • If the incoming video contains compressed VBI lines but closed caption data is not present, the resultant K2 clip has an ancillary data track containing “blank” closed caption data. On playout, the blank closed caption data is inserted into the video, but no closed caption is displayed for the video.
  • If an MPEG program/transport stream contains both ATSC Closed Captioning inserted into the MPEG picture user data and compressed VBI lines, the K2 system ignores the compressed VBI lines and processes for the ATSC Closed Captioning instead.
  • The K2 system does not process the incoming video when the following occurs:
    • The video does not contain compressed VBI lines
    • The video already contains an ancillary data track
    • The video is High Definition (HD)
    • The video is a GXF complex movie, such as a program or a playlist.

Copyright © 2015 Grass Valley USA, LLC. All rights reserved. K2 Summit 9.5 gvtp_20151106_14:27:14