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Annex: Digital Video and Data Storage
The output image
First field
Second field
You normally don’t have to worry about field processing. The video material
goes through the entire processing chain as fields and is exported again as
fields or burned onto DVD or shown on TV when played back on a DVD as a
full picture. Only in certain rare conditions is it necessary to go deeper into this
process. Two problems can occur:
1. Interlace artifacts
To be displayed on a computer monitor (during recording, in your TV/VCR,
and in the arranger during editing), the two fields must be combined to form a
full screen.
These two fields are not the same, since two fields are created during the
recording between which a 1/50 of a second gap is evident. Moving objects
can therefore produce artifacts on vertical edges.
Typical interlacing errors
You can use so-called de-interlacing to avoid this type of artifact. De-
interlacing places a picture in between the two fields (interpolated). If you want
to create stationary pictures from movies, then you should definitely use a de-
interlace filter.
In the system settings ("File" menu -> Program settings) you can set the
preview monitor display to use hardware de-interlacing during video
recordings for the video recorder and for display in the arranger.
2. Incorrect field rate
If you move around the series of fields in a movie data stream, then you will
see strong jitter and flicker effects. Picture objects move in a backward
movement – two steps forwards, one back – since a delayed field is shown
before the previous one. This can happen in the processing chain if you export
Summary of Contents for Video Easy 3 HD
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