EVS XT Series User Manual

XT Series DISK RECORDER - Version 10.01 - Software Technical Reference Manual Issue
10.01.D
EVS Broadcast Equipment SA
–
October 2009
25
Important
Some video formats allowed on XT[2] hardware create clips that are not
compatible with previous hardware. When an incompatible format is
selected, a warning will be issued at the starting up of the application. In
addition, the video format information displayed on the Shift-F2 page of
the Multicam indicates any incompatible information.
VIDEO DISK BLOCK SIZE
[512Kb]
This parameter indicates the size (in KB) of data blocks to be recorded to or read
from the disks.
OPERATIONAL DISK SIZE
Range: [0…100]
This parameter indicates the percentage of the disks actually used to store the
data. Restricting access to the centre part of the drives increases the performance
of the system but decreases capacity.
REC HD-> SD LOW LATENCY
Possible Values: Off / On
This parameter prevents the downconverted output of the record channels from
being delayed. This is very useful in setups including high resolution and low
resolution servers.
VERTICAL INTERPOLATOR AND FOUR LINES INTERPOLATION
Possible values: Off / On
This parameter enables or disables the interpolation process. Select ‘off’ to
disable the interpolation process, or ‘on’ to enable the interpolation process
selected by the 'Four lines interpolation' parameter. The interpolation process is
aimed at reducing the vertical jitter of the pictures that is present during slow-
motion replays.
This vertical jitter is actually caused by a violation of the frame parity when
playing back the pictures at less than 100 % speed.
The process consists in re-building new frames to produce a more transparent
result. These frames have to be interpolated - i.e. calculated by making suitably
weighted averages of adjacent lines. There are 2 interpolation modes: the 2-line
interpolator and the 4-line interpolator. The disadvantage of this method is that it
reduces the vertical resolution. This is particularly true with the 4-line interpolator.

EVS XT Series Specifications

General

Brand	EVS
Model	XT Series
Category	Computer Hardware
Language	English