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WHAT IS VIDEO CONFERENCING???
Video conferencing
is simply a vehicle for interactivecommunication.
enables one set of people to see and hearpeople in a different location.
in its most basic form is the transmission ofimage (video) and speech (audio) back and
forth between two or more physicallyseparate locations.
Also known as Videoteleconference.
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BASIC FEATURES
Very straightforward approach.
Calls can be made locally, nationally or
across the world.
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VIDEO CONFERENCING COMPONENTS
Camera
Microphone
Speakers
TV or Monitor
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CAMERA
To capture & send video during video
conferencing.
MICROPHONE
To capture & send audio during video
conferencing.
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SPEAKERS
To play the audio received during video
conferencing.
MONITOR
To display the video received during video
conferencing.
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ADDITIONAL REQUIREMENT
CODEC
Codec - COder-DECoder( COmpressor-
DECompressor )- makes the audio/videodata "small enough" to be practical forsending over expensive networkconnections.
A codec takes analog signals, compressesand digitizes them, and transmits the signalsover digital phone lines.
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VIDEOCONFERENCING SYSTEMS
Dedicated systemshave all required components packaged into
a single piece of equipment.
usually a consolewith a high quality remotecontrolled video camera.
Desktop systems
are add-onsto normal PCs, transforming
them into videoconferencing devices.
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Dedicated systems
Large group videoconferencing:non-portable, large, more expensive devices usedfor large rooms and auditoriums.
Small group videoconferencing: non-portable or portable, smaller, less expensivedevices used for small meeting rooms.
Individual videoconferencing: usuallyportable devices, meant for single users, havefixed cameras, microphones and loudspeakersintegrated into the console.
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VIDEOCONFERENCING TYPES
Point-to-point
A videoconference that connects two locations.
Each site sees and hears the other sites at all times
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VIDEOCONFERENCING TYPES
Multi-point
A videoconference that connects to more thantwo sites through the use of a multi-point
control unit( MCU ) or video hub.
Participants at all sites can hear one another atall times and see the site that is currentlyspeaking.( Voice activated switching)
This is a bridge that interconnects calls fromseveral sources.
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USES
Business
E-Meetings
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USES Chatting with friend
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USES Family talk
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USES Telemedicine
Transmission of medical images Diagnosing & consulting
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USES
Videoconferencing in my hand
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ADVANTAGES
Student learning is impacted in several ways:
Enhances student motivation.
Is exciting or different, catches the students
attention.
Connects with the real world.
Promotes student retention and learning.
Accesses information from primary
sources.
Accommodates many learning styles.
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ADVANTAGES
Students have the opportunity to interact with
the experts in a particular field of study.
Videoconferencing accommodates a variety ofdifferent learning styles through severalmodalities.
Videos
Animations
Audio
Graphics
Collaboration
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ADVANTAGES
Videoconferencing affords students the
opportunity to develop and improve various
communication skills.
Presentation and speaking skills. Communication and management skills.
Questioning and interviewing skills.
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ADVANTAGES
Use of sign language communications for deaf,
hard-of-hearing and mute Can improve work quality
Reduce costs
Improves communication
Groups can meet more frequently
Critical meetings can be conducted in less time
More faculty and staff can be involved
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LIMITATIONS Initial cost of the equipment is high.
Ghost/Blurredimages seen when rapid movement
occurs :
Audio echoeffect seen when system is not properlyinstalled :
Switch OFF microphone when not in use.
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