Overview of Videoconferencing

Overview of Overview of VideoconferencingVideoconferencing

Brad Paleg

CIT – Distance Learning

January 22, 2002

Overview of Videoconferencing - Slide #2

"Facing the Challenge of a New Age""Facing the Challenge of a New Age"

“This new world of geographical togetherness has been brought about, to a great extent, by man's scientific and technological genius. Man has been able to dwarf distance, place time in chains and carve highways through the stratosphere. Through our scientific genius, we have made the world a neighborhood…”

Martin Luther King, Jr., December, 1956


Learner GoalsLearner Goals

Describe videoconferencing concepts, including situations where videoconferencing may be used

Identify the videoconferencing equipment Locate and utilize AGNR specific

videoconferencing information on the web Describe who to contact for scheduling a

videoconference Describe how to prepare for a videoconference


Videoconferencing – What Is It?Videoconferencing – What Is It?

“Video conferencing in its most basic form is the transmission of image (video) and speech (audio) back and forth between two or more physically separate locations.”

Video Conferencing Cookbook.

http://www.vide.gatech.edu/cookbook2.0/


Videoconferencing ComponentsVideoconferencing Components

Cameras (to capture and send video from your local endpoint)

Video displays (to display video received from remote endpoints)

Microphones (to capture and send audio from your local endpoint)

Speakers (to play audio received from remote endpoints)


In Addition, Two Additional Requirements:In Addition, Two Additional Requirements:

Codec - "compressor/de-compressor“ - makes the audio/video data "small enough" to be practical for sending over expensive network connections. A codec takes analog signals, compresses and digitizes them, and transmits the signals over digital phone lines.

The Supporting System and the Network Connection


H.323 – It’s Not a DiseaseH.323 – It’s Not a Disease

Standard for interoperability in audio, video and data transmissions as well as Internet phone and voice-over-IP (VoIP)

Enables videoconferencing without usage fees

But does not have QOS (quality of service)


POP QUIZ (multiple choice)POP QUIZ (multiple choice)

A polycom is:– A) one of those geometric atrocities whose

angles add up to heck of a lot more than the sum of its sides

– B) A tame parrot (Polycalm, get it?)– C) A triangular representation of the USS

Starship.– D) None of the above


PolycomPolycom

Polycom is the market leader in endpoint voice and video communications.

AGNR has been a user of Polycom equipment for roughly two years.

This past summer, University System of Maryland upgraded its Interactive Video Network (IVN), standardizing on Polycom videoconferencing equipment.


Polycom UnitsPolycom Units

Large conference room units:– ViewStation FX and the VS 4000

Medium conference room units:– ViewStation MP

Personal units: – ViaVideo


Show Me The MoneyShow Me The Money

Medium / Large Room Systems– ViewStation FX - $8,000 –$10,000

Small Room Systems– ViewStation H.323 - $4,000 - $6,000

Desktop Systems– ViaVideo - $400


Point-to-point ConferencesPoint-to-point Conferences

Point-to-point – A videoconference that connects two locations.

Each site sees and hears the other sites at all times


Multipoint ConferencesMultipoint Conferences

Point-to-multipoint – A videoconference that connects to more than two sites through the use of a multi-point control unit, or MCU.

Participants at all sites can hear one another at all times and see the site that is currently speaking.– Voice activated switching

Multi-point conferencing can be effective although the scheduling, technical, and logistical dimensions of MCU conferences can be imposing.


Multipoint ConferencesMultipoint Conferences

AGNR has two different capabilities of participating in multipoint conferences– Utilize a bridge maintained by the USM Office

of Information Technology– Some of the Polycom units (Gudelsky Center,

LESREC, UMD - Plant Sciences, and UMES) include four point MCU functionality


But It’s Much More Than Video:But It’s Much More Than Video:

Computer presentationsOther media

– CDs, DVDs,

ELMO visual presenter (hardcopies, photos)


Various Uses:Various Uses:

Presentations Virtual meetingsVideoconference-based learningJIT (just in time) eventsRecruitment/search committeesGeneral meetings


Additional Uses:Additional Uses:

Project coordination Informal work sessions Alumni relations Question and answer sessions


Videoconferencing Is Passé Videoconferencing Is Passé TerminologyTerminology

Traditional videoconferencing was about audio-video communications to facilitate meetings without the burden of travel.

Visual collaboration is much more; it is the combination of audio and video and data in both real-time and store-and-forward applications.

It’s not just about meetings anymore.


Visual CollaborationVisual Collaboration

Meetings Meetings, presentations, training

Work alone Teaming, local and remoteOn-site training Distance learning, online

trainingSave Money Be more productiveReliable connections Managed network servicesVideoconferencing Visual collaboration

Visual CollaborationAndrew W. Davis

Wainhouse ResearchJune 1999


Benefits of VideoconferencingBenefits of Videoconferencing

Can improve work quality Increase productivity Reduce costs Improves communication Groups can meet more frequently Critical meetings can be convened in less time More faculty and staff can be involved


Benefits of Videoconference-based Benefits of Videoconference-based LearningLearning

Closely resembles traditional classroom-based education; permits learners to be active participants in the process

Faculty and staff needs can be met more quickly through just-in-time training

More faculty and staff can be trained faster without increasing training resources

Guest lecturers can be easily integrated into the course


Benefits of Videoconference-based Benefits of Videoconference-based LearningLearning

Enables any site to be the provider of the learning activities.

Videoconferencing is cost-effective, when you consider the traveling costs for traditional training.

Videoconference-based learning exploits the already acquired videoconferencing technologies and network infrastructure.

H.323 standards provide for learners in any H.323 compliant site to be active participants.


Limitations of VideoconferencingLimitations of Videoconferencing

The initial cost of the equipment and leasing the lines to transmit conferences may be prohibitive.

Unless a strong effort is made by the instructor, students not located with the instructor may remain uninvolved in the course.

If visuals, like handwritten or copied materials, are not properly prepared, students may have a difficult time reading them.



If the “pipe” that carries the transmission among sites is not large enough, the students may observe “ghost images” when rapid movement occurs in “real time”

If the system is not properly configured, class members may observe an audio “echo” effect. The result is audio interference that detracts from the learning environment.



The absence of QOS (Quality of Service) provides virtually no guarantee of a satisfying and successful experience

Though the technology is improving, a successful videoconference is dependent upon the connections and technologies at all of the participating sites, AND the network infrastructure

Security issues


Tricks Of The TradeTricks Of The Trade

At the beginning of a videoconference make sure that participants introduce themselves. It is often helpful to have a sign in the background that gives your location.

Look directly at the camera as often as possible when speaking.

Wear neutral, solid colors. Avoid checks and stripes. Avoid white and shades of red. Red is not codec-friendly. Bright fluorescent objects also cause halo effects and other distracting artifacts.



Be natural, but try to minimize motion. Try to arrange a simple, uncluttered, static

background in neutral or darker solid colors. Do not sit in front of windows. Tilt pictures, framed degrees, awards or any other glass-covered wall hanging downward to eliminate reflection and glare.



Try to have direct light on the face of the person speaking. Too much light from behind causes silhouetting, too much from above causes shadows under the eyes.

Avoid placing videoconferencing equipment in rooms prone to echo effects or exposed to outside noise. Eliminate in-room sources of extraneous noise. On multipoint video conferences mute your location when not speaking.



Be aware of the transmission delay ... pause for others to comment.

When asking questions in a group conference, direct the question to a specific individual if possible.

Use a real or even a fake plant to humanize the setting.

Visual CollaborationAndrew W. Davis

Wainhouse Research


Gudelsky Center

UMD Plant Sciences Building

UMD, Symons Hall

Salisbury Facility (LESREC)

UMES, Henson Center

Washington County CESWye

AGNR Videoconferencing FacilitiesAGNR Videoconferencing Facilities


AGNR Videoconferencing FacilitiesAGNR Videoconferencing Facilities

Gudelsky Center, Al Ingling UMD, Plant Sciences, Chris Sargent Salisbury Facility (LESREC), Expected

to be operational - Feb '02, Vanessa Fitzmaurice

Symons Hall, Brad Paleg UMES, Henson Building, Kat Harting Washington County Cooperative Extension Office,

Steve Rogowsky Wye, Nan Stenzel


AGNR Videoconferencing InfoAGNR Videoconferencing Info

http://www.agnr.umd.edu/CIT/DL/

Click on Videoconferencing


Videoconference-basedVideoconference-basedLearning StrategiesLearning Strategies

Establish Class Expectations– It ain’t MTV– At the begging of the session, prepare the preparing

learners for an active experience

Reduce DistractionsEngage Students with Variety and InteractionEncourage Dialogue


Video Conferencing EtiquetteVideo Conferencing Etiquette

This is new and we are learning. Those who come from a television

(production, not watching) as opposed to a computer background tend to be more effective.


Prepare for the Worst Case ScenarioPrepare for the Worst Case Scenario

Find out who handles difficult technical problems and how to contact him/her.

Designate a remote facilitator. Develop a contingency plan for the remote site

and share it with the remote facilitator. You might, for example, have a discussion topic or activity that supports the videoconference outcomes.


Prepare for the Worst Case ScenarioPrepare for the Worst Case Scenario

Share telephone numbers with your remote facilitator and troubleshooters.

Make sure you (and your troubleshooters) are familiar with the equipment.

Establish your connection 15-30 minutes prior to the meeting time. Most technical problems are observable when establishing a connection.

If you have never connected with your remote site plan a "dry run" a week or so ahead of time.



Testing, testing, 1, 2, 3,…– Connect and test PRIOR to the scheduled time– Utilize the picture-in-picture to get a sense of

what the remote sites are seeingLeaving well enough alone…

– If the videoconference is satisfactory make as few adjustments as possible

– Unnecessary "twiddling" of audio or video can have very distracting results.



Are you still with me?– Videoconferencing is much more like an in

person exchange than a telephone call — body language and facial expression count!

– Avoid "multi-tasking" with other work, looking at other applications on the computer screen, talking to other local participants.



Talking out of turn…– Stray noises and side conversations within a

video conference distract from the primary conversation.

– Side conversations at remote sites seem to spring up more readily than they would if everyone were in the same actual room, which causes problems to voice-activated switching.


Videoconferencing Resources:Videoconferencing Resources:

AGNR information: – http://www.agnr.umd.edu/cit/dl/, click on

Videoconferencing Video Conferencing Cookbook.

– http://www.vide.gatech.edu/cookbook2.0/ Distance Education at a Glance Guide #10

– http://www.uidaho.edu/evo/dist10.html

Videoconferencing for Learning– http://www.kn.pacbell.com/wired/vidconf/

Documents

Overview of Videoconferencing