Transcript Slide 1

The Evolution of Video
Conferencing
Tyler S. Fiore – Director, Sales Engineering
© British Telecommunications plc
HD Television and HD Video Conferencing
• High-definition TV (HDTV) is the newest set of video
standards for high resolution television viewing.
• HDTV is broadcast one-way, transmitting video in
one direction.
• High-definition video conferencing is two-way
interactive communication where audio and video
data are transmitted in real-time across a network.
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Technology moves ahead….
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And keeps moving ahead…
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High Definition is Here!
• Manufacturers in every part of the video industry are embracing
the concept and standard of HD
• But for an interactive application like video conferencing, HD is
more than just a resolution
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What does all this mean?
•
High definition means high resolution or a large number of pixels for monitors.
– Original format 4:3
– New format 16:9 (greater field of view)
•
Image resolution is three times better than standard television and over nine times better
than traditional video conferencing.
•
Effectiveness of video conferencing in healthcare.
– Complex medical situations now done with regularly scheduled video conferences
– Physicians earn required CME credits using video conferencing
– Grand rounds, physicians can share their expertise and Telemanagement Resources
•
Enhancing standard video conferencing with high definition only improves the benefits and
increases the number of applications for which individuals can obtain medical information
and be treated remotely.
– With the addition of high definition content sharing devices like PCs, DVDs, and highresolution document cameras and devices, physicians and patients can now connect
for training or diagnostic issues and be assured of the highest level of learning or care
possible
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Standard Video Conferencing Compared To
High Definition
• To compare standard video conferencing to high
definition video conferencing one needs to
understand;
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Resolution
Frame Rate & Format
Display Systems
Bandwidth
Audio Quality
Camera Design
Common SD and HD frame rates and format
Format
Frames/Second
Pixels (H x V)
Aspect
Ratio
Type
480p
24, 30, 60
345,600 (720 x 480)
4:3
SD
576p
24, 25, 50
414,720 (720 x 575)
4:3
SD
720p
24, 25, 30, 50, 60
921,600 (1280 x 720)
16:9
HD
1080i
25, 30
2,073,600 (1920 x 1080)
16:9
HD
1080p
24, 25, 30, 50, 60
2,073,600 (1920 x 1080)
16:9
HD
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Industry Standard Terms and Resolutions
H
V
QCIF
176
144
25,344
1/4
4:3
CIF
352
288
101,376
1
4:3
2CIF or 1/2 D1
352
576
202,752
2
4:3
4CIF/D1
704
576
405,504
4
4:3
SD - 480i
720
480
345,600
3
4:3
ED - 480p
720
480
345,600
3
4:3
HD - 720p
1280
720
921,600
9
16:9
HD - 1080i/p
1920
1080
2,073,600
20
16:9
SVGA
800
600
480,000
4:3
XGA
1024
768
768,432
4:3
1280
1024
1,310,720
4:3
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HxV
Multiples
Aspect
Resolutions Progression
CIF
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4CIF
(4 X CIF)
HD
(9 X CIF)
Display Systems
• A video conferencing system needs a display or
projection device for maximizing visual output.
• With HD the aim was to double the horizontal and
vertical resolution and increase the viewing angle
from 10 degrees to 30 degrees horizontally and 20
degrees vertically.
– 16:9 vs. traditional 4:3 screens
– greater field of view significantly increases the sense of
“being there”.
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High Definition Viewing
• More information on the screen with 16:9
4:3 Aspect Ratio
16:9 Aspect Ratio
20% more information
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Sizing the Monitor
• Correct monitor selection will also require matching the size of the
room and the average distance participants will sit from the
monitor.
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Screen Size 16:9
Viewing Distance
30 in.
6.25 ft.
34 in.
7.0 ft.
42 in.
8.75 ft.
50 in.
10.4 ft.
57 in.
11.9 ft.
60 in.
12.5 ft.
65 in.
13.5 ft.
HD Enriches the Visual Experience
• Higher resolution
– Better picture quality = less fatigue
– Maintain attention and focus in a meeting
• Enhanced clarity with motion
– Crisper images
– Ideal for large groups, classrooms, hand motions
• Colors are sharper and more true to life
– Critical when color is a key determining factor
• Education content providers (underwater marine lab)
• Medical diagnosis (x-rays, skin rashes)
• Manufacturing (textiles, raw materials)
• More diverse types of content
– High resolution photographs (blueprints) and richer content
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Display benefits
• Users are amazed when they first experience the
nuances of expression and gestures that are visible
with high definition video conferencing.
• For healthcare purposes, the use of high definition
video conferencing allows people to really SEE what
they are viewing.
– Observation of patient care, surgery, life monitors, and xray films are examples of the content sources that will
benefit from HD.
– Specialized educators in healthcare can provide
continuing medical education at a distance by allowing
physicians and nurses to participate in remote training
sessions and truly experience all the nuances of patient
care at the distant end.
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Bandwidth
• Standard video conferencing systems used today operate
at bandwidths ranging from 128 Kbps to 768 Kbps.
– Historically been selected to minimize cost and
because additional bandwidth was not always
available.
• High definition video conferencing systems use a
minimum of 1 Mbps of bandwidth to operate effectively
– 2 Mbps or better recommended to allow the use of
additional high definition content sharing devices like
PCs, DVDs, or high-resolution document cameras.
• Quality of Service (QoS) for the network is a must to
ensure consistent performance for the duration of video
conferencing calls.
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HD Defined
• Enhances productivity, effectiveness , and
efficiency - an engaging life like experience with
superior audio fidelity, video clarity, and detailed
content that allow you to manage globally dispersed
teams, speed time to market and build loyal
relationships over distance
• Ensures a lifelike user experience everywhereconsistent premium experience from mobile, desktop,
and conference room
• Enables the next generation of collaborationconferencing, broadcasting, streaming and archiving
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Current Challenges
• Knowledge transfer is critical for healthcare
providers.
• Challenging problems include:
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a shortage of skilled doctors and nurses,
a potential for global outbreaks of new diseases,
spiraling medical costs
and an aging population
HD Benefits
• HD video conferencing ensures that medical professionals can
service patients remotely, obtain continuing medical education,
and run the day-to-day business of hospitals without any loss of
quality or care.
• Because the technology is so good, physicians and other care
givers are able to see symptoms clearly and patients are able to
relate to these professionals often from the comfort of their own
home.
• Healthcare professionals can participate in training without
physically being present, more professionals will be able to
obtain continuing medical education at a distance and save time
and money.
• Hospital administrators can accomplishing their jobs more
effectively and efficiently by using HD video technology to
interact with others as if in person, obtain detailed medical
information, and not have to leave their primary office to travel
from site-to-site for meetings.
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What does the future hold?
• Video adoption growing
• From the boardroom to
living room
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Bandwidth becoming pervasive
• Adoption demands better
quality
• New and interesting types
of applications
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Thank you