EVS XT2 Version 11.01 - November 2012 Configuration Manual - Manual (Page 98)

3.3.4. Interpolation Settings
Introduction
The Interpolation settings are available on the Server tab in the server-based application
(1st page) and web-based interface in the advanced mode.
The Interpolation settings are highlighted in the screenshot of the server-based application
shown below:
General Description
The interpolation process aims 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, that is calculated by making suitably weighted
averages of adjacent lines.
There are two interpolation modes: the two-line interpolator and the four-line interpolator.
They are not mutually exclusive:
• The two-line interpolator reduces the vertical jitter, but also the vertical bandwidth.
• The four-line interpolator makes it possible to have perfectly steady pictures, but
reduces even more the vertical bandwidth.
Note
All VTRs use interpolation in PLAY VAR mode.
XT2+ Server - Version 11.01 - Configuration Manual
3. Multicam Configuration 88