Digital Video Tape formats can be used in several places
in the DVD production process, from the creation of the original master
to the delivery of the final tape to the pressing plant. These tapes all
have quite robust error correction schemes to ensure that what goes on
to the tape is what comes off the tape, however, when these fail, the resultant
artefacts in the video stream are very ugly indeed. Unlike analogue tape
dropouts, which are generally tolerable, digital video tape dropouts are
extremely noticeable, with large blocks scattered through the image, frequently
with colours that bear little relation to the surrounding image.
The Shootist 9:08
Close up of the above image. Note the clearly evident artefacts and
their blocky, digital nature.
