how is distance education delivered
TRANSCRIPT
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DISTANCE EDUCATION
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It is defined as an educational system in which the students is formally enrolled in a school or college but receives instruction at some remote areas.
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However the delivery system most common today are based on video, audio and computer technologies.
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VIDEO DELIVERY
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Transmit voice, graphics and images of people.
Video Delivery
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Two-way video and audiopresenters and audience can see and hear each other.
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One-way video and two-way audioaudience sees and hears the
presenter, while the presenter
hears only the audience.
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Signals can be sent via satellite, microwave, fiber optics and coaxial cable.
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SATELLITE
MICROWAVE
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Video teleconference can be classified into two broad areas according to the technology used for transmission:
Full-motion video – uses normal TV broadcast method or an analog video channel that requires a wideband channel to transmit pictures.
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Compressed video – is compressed by a piece of technology known as a Codec, in order to send it down the narrower bandwidth of a special telephone line.
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Audiographic Delivery
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Is the transmission of still image andaudio signals . With an electronicblackboard, the image is drawn orwritten on a pressure sensitivesurface that converts the writing toaudible telephone tones.
Audiographic Delivery
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Electronic blackboard