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Extron electronics VN-Matrix 325 Manual de usuario Pagina 2

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Introduction
Video and audio signals have traditionally been delivered over
coaxial or twisted pair cable. Use of fiber optic cable is popular when
transmission distances exceed 100 meters. Use of these cables
for audio and video delivery requires careful planning to ensure
that once installed, the fixed endpoints and cable infrastructure will
fulfill all current and future input and output requirements. Extron
VN‑Matrix
®
systems make delivery of audio and video over standard
IP networks possible, providing the opportunity to deliver real‑
time AV content to any endpoint a network reaches, with very low
latency and without risk of quality loss throughout the transmission
path. Multicast networking capabilities offer scalability for VN‑Matrix
streaming that is only limited by the size of a network.
VN-Matrix 325
The VN‑Matrix325 codec is a unique streaming solution for
delivering high quality SDI, HD‑SDI, or 3G‑SDI video signals with
embedded audio. Common applications include streaming transport
of broadcast and production grade cameras, video editing or
effects equipment, and high definition conferencing or telepresence
cameras. VN‑Matrix 325 has very low encode and decode latency,
making it valuable to applications where low delay will support
natural bi‑directional communication, remote device control, or
help reduce the time used by a video workflow. This makes it
valuable for real‑time production, collaboration, communication,
and presentation applications. VN‑Matrix325 also provides a variety
of bit rate management and compression controls, allowing it to
be configured to operate over a range of bandwidths and network
conditions. The combination of high quality, low delay, and flexible bit
rate management makes the VN‑Matrix325 codec the ideal product
for many quality‑critical applications.
PURE3 Codec
The Extron PURE3 codec is applied in VN‑Matrix 325. It was
developed to support unique performance capabilities that were
unfulfilled by existing compression standards. The PURE3 codec
supports streaming of video and audio across networks with very
low latency, visually lossless image quality, 4:2:2 color sampling, and
10‑bit color depth, maintaining original source quality. This makes it
ideal for low delay, collaborative, or interactive applications with the
most demanding quality requirements. PURE3 error concealment
provides a high immunity to network errors, preserving quality
even under conditions of heavy packet loss, without the typical
need for additional delay or bandwidth seen with error correction
technologies. PURE3 error concealment can also eliminate the
need for expensive high QoS managed network services. The
performance delivered by PURE3 allows VN‑Matrix 325 to be
operated on a variety of network connections.
True High Definition Quality
The PURE3 codec in the VN‑Matrix 325 codec can deliver visually
lossless image quality. It is ideal for applications that test and
evaluate quality such as remote color grading. It can also be used to
contribute real‑time content into live video productions.
Embedded Audio
The VN‑Matrix 325 supports streaming of embedded audio,
transparently passing four channels of lossless, synchronized audio
per ancillary – ANC data block. Up to four ANC data blocks can be
streamed with video carrying 16 audio channels. Alternatively, two
channels of audio can be streamed alone in stereo mode delivering
mono, stereo, or 5.1 surround sound in applications requiring use of
lower bandwidth. Video can also be streamed without audio.
Synchronized Decoding
The VN‑Matrix 325 also supports synchronized decoding of audio
and video streams across multiple decoders maintaining genlock
and framelock even when network errors are experienced. This
capability can be valuable for video delivery from cameras or sensors
with more than one signal output, applications using multiple
cameras, or very high resolution material comprised of multiple high
definition signals.
Applications
VN‑Matrix 325 is useful in a number of quality‑critical applications:
A Live Video Delivery Across a Campus
A Production Collaboration
A Studio to Studio Media Exchange
A Delivery of Contribution or Primary Distribution
A Sports and Live Event Streaming
A Signal Distribution Over Networks
A Video Monitoring
A In-house Signal Distribution and Routing
A Virtual Switching on Networks
A Remote Video Device Control
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