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Video Conferencing : Using a computer, video
camera, and network such as the Internet, to conduct a live conference
between two or more people. Video conferencing is an extremely useful
method of communication because it saves people the time and expense of
travel and can often accomplish many of the things a physical meeting
can. A two-person videoconference is known as point-to-point, while more
than two people involved in a session is a multipoint conference.
involves two or more parties in different locations engaging in
communication via video transmission.
Definitions:
-Communication across long distances with video and
audio contact, that may also include graphics and data exchange. Digital
video transmission systems typically consist of a camera, codec
(coder-decoder), network access equipment, network and audio system.
-Allows participants to hold a conference from their
remote desktop computers. Videoconferencing introduces new requirements
to the ordinary transfer of video information. First, there is a
requirement for guaranteed latency because to sustain a moving image,
the next frame of information must get to the other end to avoid image
freeze. In practice, the image information is highly compressed and the
effects of delayed information in a video sequence is less than the
effect on voice.
-A videoconference (also known as a video
teleconference) is a meeting among persons where both telephony and
closed circuit television technologies are utilized simultaneously.
Video teleconference communication is multi-way and synchronous, as it
would be if all parties were in the same room.
-The term Video Conferencing applies to a wide range of
situations from live video lecturing to large audiences, to a
point-to-point, individual-to-individual desktop PCs. Usually allows for
broadcast from a central point to many different locations regardless of
distance.
Best Video Conferencing Solutions:
1.
Cisco TelePresence System
with 1080p HD video and HD audio.
The best room and furniture design.
Proprietary non-standard technology.
As yet, no multipoint links. Cisco
has plenty of orders and will
install over 100 systems for its own
use.
2.
HP Halo Collaboration Studio
TelePresence System with high
quality video and audio. Proprietary
technology. Halo will link to
standards-based systems in Q2 2007
thanks to collaboration with
TANDBERG. HP has installed 90
systems worldwide so far, including
many for its own use.
3.
Polycom HD Telepresence Solution
- Polycom RPX HD with 720p HD video
on large cinematic walls and its own
Siren HD audio. Eye-level HD
cameras. Standards-based technology.
Multipoint with Polycom MGC HD MCU.
4.
Teliris VirtuaLive HD
unified and customized Telepresence
Suites with 1080p video at 60fps and
HD audio. Flexible designs for
rooms. Multipoint available.
Supports SD video conferences.
5. The
Aethra Vega X7 high
definition (HD)
visual communication systems is
optimised for 768 Kbps; it provides
720p HD video, stereo HD audio, a
nine-site MCU and a third-party HD
camera.
6.
LifeSize Room HD videoconferencing
system with 720p HD video and
LifeSize own proprietary HD audio
system. Multipoint for four sites.
Meeting scheduling from Microsoft
Outlook.
7. The
Polycom HDX 9004
high definition (HD)
visual communication system provides
a HD video format of 720p resolution
(1280 x 720 pixels), Polycom HD
audio, Polycom HD camera and more.
8. The
Sony PCS-HG90
high definition (HD)
visual communication system provides
a HD 720p video format at 60 fps and
a video transfer rate up to 8 Mbps
over an IP network. Multipoint for 4
sites.
9. The
TANDBERG 95 MXP,
85 MXP and 75 MXP high definition (HD)
visual communication systems provide
HD video at 720p resolution, stereo
HD audio, and a TANDBERG HD camera.
10. The
TANDBERG Centric 1700 MXP
high definition (HD)
visual communication system gives
busy executives at the desktop HD
video at 720p, stereo HD audio, and
a TANDBERG HD camera.
Video Conferencing Systems:
How do I choose a Video
Conferencing system?
Well, you could
just buy the same as the person you
want to have a conference with.
However, this might not be the best
solution. There are essentially two
types of systems, proprietary and
standards based. If the person you
want to have a conference with uses
a proprietary system, then you must
buy the same as them, or persuade
them to buy something
different.There are many questions
that must be answered as you steer
your way towards identifying which
is the best Video Conferencing
system that meets your needs. This
document is about standards based
systems and is intended as a guide
to their selection.
International Telecommunications
Union & The Internet Engineering
Task Force.
Integrated Digital Services Network
(ISDN).
Local Area Network (LAN) & Intranet.
Plain Old Telephone Service (POTS).
Cellular Networks.
Internet, VPN & ADSL.
Issues to Consider.
Expectation Levels.
Required versus Available Bandwidth.
Acceptable Quality.
Video Conferencing applies
Compression.
Number of
Participants.
System Management.
Location of Participants.
ADSL, ISDN or the Internet.
Usage Concepts.
Installations and Usage Costs.
H.323 based Video Conferencing
systems.
H.320 based Video Conferencing
systems.
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