
Crystal Vision Introduction
1 Introduction
The UP-DOWN-VF is a range of four up-down converters for use with ‘Vision’ rack frames
from Crystal Vision that allow flexible up, down and cross conversions between 3Gb/s, HD and
SD sources, provide an output picture of exceptional quality and include special features to
allow studios to easily operate in HD and SD at the same time.
The UP-DOWN-VF range consists of the following models: UP-DOWN-A-VF,UP-DOWN-AS-
VF,UP-DOWN-ATX-VF and UP-DOWN-ATXS-VF.
The up conversions are SD to 720p, 1080i or 1080p. The cross conversions are: 720p to
1080i or 1080p; 1080i to 720p or 1080p; 1080p to 1080i or 720p. The down conversions are
1080p, 1080i or 720p to SD. UP-DOWN-VF’s excellent picture quality is a result of motion
adaptive video de-interlacing, which maximises the picture’s vertical resolution while choosing
the best processing method based on the video content.
UP-DOWN-VF can perform two conversions at the same time, with two separate converters
on the card: one is used for the up and cross conversion, with the other used for the down
conversion, which makes it the perfect up/down/cross converter for installations that work in
multiple definitions, allowing simultaneously HD and SD copies of a feed from one card.
UP-DOWN-VF provides a maximum of three feeds of the main output and three feeds of the
secondary output. The most common application is to have HD (720p, 1080i or 1080p) on one
output and SD on the other, and the input as either SD or the same HD as the output. UP-
DOWN-VF is useful for installations that work in both HD and SD because it allows them to
easily create HD and SD copies of a feed and so fulfil their requirement to offer HD and SD
programming simultaneously. One of UP-DOWN-VF’s particularly powerful features is that it
will always put out HD and SD in the same place on the same connector, regardless of the
input – meaning you always know which output is going to be which and therefore don’t need
to change your wiring. Each output will either be converted from the input or be given a
matching delay as required, with the matching delay allowing all the signals to have the same
timing and enabling the use of common audio. UP-DOWN-VF can easily include integrated
fibre connectivity by fitting the appropriate fibre input or output option.
Noise reduction with detail and edge enhancement can be applied when up converting, cross
converting or down converting from 3G to 1.5G. Separate RGB and YUV proc-amps give lift
and gain controls to look after your picture colour fidelity and faulty video signal problems
provide warnings using SNMP traps. Status indications available (depending on model) are
video present, video frozen, video black, reference present, reference format, audio present
and audio silent for all four groups.
UP-DOWN-VF will look after any aspect ratio conversion requirements when up or down
converting. All versions can be used as an SD to SD aspect ratio converter if required. UP-
DOWN-VF models ATX and ATXS can be used as an HD to HD aspect ratio converter for
when the HD input and output formats are identical. This can be useful to correct the aspect
ratio of signals that were up converted using the wrong aspect ratio, resulting in an HD image
that is too squashed, stretched or cropped.
UP-DOWN-VF models ATX and ATXS additionally offer AFD code activated aspect ratio
conversion.
UP-DOWN-VF User Manual R1.1 423 June 2017