6. Betacam IMX format

6.1 Recorded signals

As far as video is concerned, these signals comply with the MPEG-2 4:2:2P@ML standard, but in I-frames only – or GOP 1 – to facilitate editing operations. Remember that this signal is characterized by 4:2:2 sampling and by a recording of 608 video signal lines (625 lines) instead of the usual 575, which means that information can be retained in the blanking interval, including the vertical interval time code (VITC).

The IMX VTR also features 4 digital audio...