![background image](http://html1.mh-extra.com/html/snell-and-wilcox/hd5050/hd5050_operators-manual_1309054024.webp)
HD5050
SECTION 4
HD5050070999 Version 1 Issue 4
For Software Version Z5 onwards
4.7
Frame
This allows the user to determine how the HD5050
will process incoming video of film material. There
are a number of options.
Auto
The HD5050 will automatically pick the conversion
mode based on the selected input and output
standards.
The defaults are as follows: -
If the output standard is 1080i/60, 1080i/59.94,
1035i/60, 1035i/59.94, 720P/60,720P/59.94,
480P/60 or 480P/59.94 then if the input standard is
625/24 or 625/23.98 the HD5050 will select 2:2 to
3:2 mode. Otherwise it will pick Video -> Video
mode.
If the output standard is 1080SF/24, or
1080SF/23.98 then if the input standard is 625/24
or 625/23.98 the HD5050 will select 2:2 to 2:2
mode. Otherwise it will pick Video -> 2:2 mode.
Video -> Video
This forces the HD5050 to treat the incoming
material as video. i.e. there is motion between
fields on the incoming material. This is the mode,
which was used in software releases prior to
version Z5. This mode uses a three field aperture
unless the single field filter mode has been
selected (see above). The output from the HD5050
will also be video.
Video->Video (pair)
The HD5050 will treat the input and output material
as video. However, in this mode the HD5050 pairs
up the incoming fields into pairs before applying a
two field aperture. This is useful if the incoming
material has all its’ cuts on a defined field (e.g. field
one). In this instance, there will be no interpolation
across programme cuts because of the pairing
algorithm. The fields are paired up according to the
Pair As setting (see below) and this determines
whether the cuts are on field one or two.
Video -> 2:2
In this mode the HD5050 will convert incoming
video material into frame based material. That is,
there will be no motion between successive field
one and twos. Objects will only move at frame
boundaries. This is useful if the user wishes to
convert video material to an HD segmented frame
format. For example, one could take in 525/59.94
video material and convert it to 1080/59.94 with
frame based motion. This standard is often known
as 1080/29.97SF. Or, one could convert 625/48
(video) material to 1080/24SF (frame based
motion). It uses a three field aperture to do the
conversion.
Video -> 2:2 (Pair)
This is similar to Video->2:2 but it uses the field
pairing algorithm described in Video->Video (Pair)
mode above. Thus once again clean cut
performance can be achieved. In addition, if the
incoming material has mixed 2:2 film and video
segments, then, the film segments can be up-
converted with no inter-frame interpolation whilst
the video segments will be safely up-converted.
2:2 -> 2:2
In this mode the HD5050 assumes that the
incoming material is frame based. i.e. there is only
motion at frame boundaries. This mode uses a field
pairing algorithm and exploits the film input
characteristics to obtain higher vertical resolution
than is possible with video inputs. The fields are
paired up according to the Pair As setting (see
below). Note that because of this, if video or 3:2
based material is present at the input then the
output from the HD5050 will not be correct. This
mode is useful if one is trying to up-convert frame
based material whilst maintaining the 2:2 frame
sequence and achieving maximum vertical
resolution. An example might be the up-conversion
of 480P/30 material to 1080/30SF or, 720P/60.
Alternatively, one might input 625/23.98P and
output 1080/23.98SF.