System information

Glossary-22 Vicon MX Hardware System Reference
software. You can save settings to .rtp
files and load them to suit your particular
needs. By default, .rtp files are saved in
the active Session folder of the open
database. Also see Data streaming and
RealTime Engine (RTE).
S
S-Video connector Superior Video
connector. A hardware interface for
connecting video equipment that handles
chrominance (color) and luminance
(black and white) signals separately. An
S-video connector provides a higher-
quality signal free of the cross luminance/
color problems associated with composite
video signals. Also see Composite video
signal.
Sample skip A feature in some Vicon
application software to reduce the video
capture rate. For example, a setting a
sample skip video rate of 2 for a camera
capturing 120 frames per second reduces
the effective sample rate to 60 frames
per second.
This is useful when capturing slow
moving subjects, capturing for long
periods, or using large numbers of
subjects with many cameras. It can also
be used to reduce the amount of data, for
example, to free up space on the
computer. Also see Frame rate.
Sampling frequency See Analog
sampling frequency.
Scalar A quantity that has only
magnitude. For example, mass, length,
or kinetic energy are scalar quantities
and can be manipulated with
conventional arithmetic. Also see Kinetics
and Vector.
Scale 1) The enlargement or reduction
of an image by proportionally adjusting
its size. In Vicon application software, the
scale of a kinematic model element can
be manipulated to change its displayed
size in a 3D Workspace. Also see
3D Workspace, Rotation, and Translation.
2) The alteration of values from one unit
of measure to another. Vicon application
software can scale incoming voltage
signals (e.g. from a force plate) from bits
to Newtons (N) for forces and Newton
millimeters (Nmm) for moments. Also see
Force plate and Scale factor (analog).
Scale factor (analog) The factor by
which to multiply the incoming voltage
unit from a third-party analog device to
convert it to another unit of measure that
can be used by Vicon application
software. Also see Scale definition 2.
Scrub The movement of the current
time cursor left or right along the Time
Bar ruler to manage the trial data
currently viewable in the 3D Workspace
in Vicon application software. Also see
3D Workspace, Trial, and Time bar.
SECAM Séquential Couleur avec
Mémoire. A format defined for analog
color television, with a vertical resolution
of 625 lines and a base frame rate of
25 Hz. This is the standard used in
France, the Middle East, and most of
Eastern Europe. SECAM uses the EBU
timecode standard. Also see CCIR, EBU
timecode, LTC, NTSC, PAL, Timecode,
and VITC.
Secondary selection The second or
subsequent of multiple objects (such as
markers or graph plots) selected after the
primary selection. Also see Primary
selection.
Segment One of the constituent parts
into which a body or object is divided. A
segment can be represented in a
kinematic model of a subject, for example
a bone in a human being or an animal. A
segment can be visualized as an element
of the 3D representation of a subject in
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