NCast PR720 - Manual (Page 7)

NCast Presentation Recorder Reference Manual
PIP – A picture-in-picture function overlays one video or graphics image with a reduced-sized
version of another video image.
RFC – Request for Comments, an Internet protocol standard.
RTSP – Real-Time Streaming Protocol is an IETF approved protocol for control of real-time
streaming on the Internet.
S-Video – A video connector (usually DIN style) where luminance and chroma information are
transmitted on separate wires or cable pairs. Provides for a higher fidelity image than a
composite connection.
SDP – Session Description Protocol, for describing streaming media transmissions
SIF - Describes an image or display surface with a resolution of 320x240 pixels.
SVGA – Describes an image or display surface with a resolution of 800x600 pixels.
SXGA – Describes an image or display surface with a resolution of 1280x1024 pixels. The
aspect ratio for SXGA is 5:4. Support for a 4:3 aspect ratio is accomplished by utilizing a
1280×960 subset of the display surface.
Telnet – An IP network based protocol, which was originally used to connect remote consoles
and terminals to mainframes, but is now used as a general, bi-directional,
byte oriented
communications facility. See RFC’s 854 and 855.
Unicast – Refers to a point-to-point connection between two Internet host machines.
UXGA – Describes an image or display surface with a resolution of 1600x1200 pixels.
VGA – Describes an image or display surface with a resolution of 640x480 pixels.
WUXGA - Describes an image or display surface with a resolution of 1920x1200 pixels.
WXGA – Describes an image or display surface with a resolution of 1366x768 pixels. Some
projectors use WXGA to refer to 1280x720 as well. This display size implements a 16:9
aspect ratio, as compared to a normal 4:3 monitor.
XGA – Describes an image or display surface with a resolution of 1024x768 pixels.
1.4. P
RESENTATION
R
ECORDERS
The Presentation Recorder is a stand-alone network communications appliance which captures RGB (VGA)
or DVI signals from a desktop or laptop, compresses the image with an industry standard compression
algorithm, packetizes and transmits the imagery as an internet media stream, receives a media stream from
the internet, decompresses the imagery, and presents the received information to a viewing audience
through use of a large-screen monitor or via a room projector. Presentation Recorders are able to archive the
media stream in real-time while simultaneously webcasting, allowing for playback by the recipient at a later
date.
The following Presentation Recorder models are covered by this documentation:
PR-720-R – A rack-mounted unit with streaming and archiving capabilities. The PR-720-R introduces
support for up to WUXGA (1920x1200) input resolutions with up to WXGA (1280x720) capture resolutions and
PiP (Picture In Picture) video and graphics overlay.
NCast Corporation Revision 1.1
Page 7