Extron Electronics VN-Matrix 250 User Guide - Manual (Page 12)

Definitions
PURE3 — is specifically designed for network transmission of real time media (such as
video or graphics, audio, data, and whiteboard elements). It features both spatial and
temporal image compression, which allows for efficient bandwidth usage.
z PURE3 streams always contain video or graphic elements.
z
PURE3 streams may also contain audio and data content that is associated with the
video and graphic elements.
Media (stream) — refers to multimedia that is constantly received by (and normally
presented to) an end‑user while being delivered by a streaming provider. Internet television
is a commonly streamed medium. Streaming media (stream) in this guide refers to a PURE3
media stream that is produced by a VN‑Matrix encoding device.
Device license — refers to the number of licensed features that are available on a device
within a VN‑Matrix system. All devices contain a license that offers a default level of
functionality. Device licenses cannot be modified.
Controller license — refers to the license that is set on the device designated as the
system controller. The Controller license enables the use of VN‑Matrix software decoders.
Controller licenses may be modified to suit changing system requirements.
UDP data — refers to the transfer of serial data between an encoder and a decoder. Data
input is created at the encoder, placed into the PURE3 stream, and sent to the decoder. The
data is received in the same form that it was transmitted. This method of data transfer is
unidirectional and can only be sent from an encoder to a decoder.
High-Level Interface (HLI) — is the command protocol that is used to communicate
between the VNM Enterprise Controller and an external control system.
Display Monitor Timings (DMT) — a list of VESA standard pre‑defined timings which are
commonly used within the computer industry.
Coordinated Video Timings (CVT) — the newest VESA standard for generating display
timings (released on March 2003).
Generalized Timing Formula (GTF) — a method of generating industry standard timings
used by a wide variety of display products.
Features
Stream at native resolutions up to 1920x1200 and 2048x1080 — compatible with
signals used in high‑resolution display applications.
Low latency streaming — 35 ms encode and 35 ms decode — Supports natural
interaction, bi‑directional communication, or remote device control in real‑time operating
environments.
SFP port for use with optical Ethernet transceivers — provides the option to use an
optical Ethernet network interface to optically isolate a source or eliminate electro‑magnetic
emissions in secure applications.
Extensive bit rate management — uses compression and bit rate management controls
to tune image quality and bit rate to fit a variety of application and network requirements.
High immunity to network errors — AV streaming maintains reliable, high quality imagery,
concealing errors even during heavy packet loss.
Unicast or multicast streaming — supports scalability and compatibility with different
network operating conditions.
PURE3 Codec — low‑latency, visually lossless compression offering efficient bit rates, and
high immunity to network errors for streaming very high quality video with low delay over IP
networks.
VNM 250 • Introduction 6