Distance Education Videoconferencing Techniques
Distance Education
Videoconferencing Techniques
Projects
1 . Observe and critique one 2-way video/2-way audio conference distance learning program, and one 1-way video/2-way audio satellite delivered distance learning program.
Projects
2. Critique two computer mediated communication (CMC) education or training programs: 1 from NASA Live (as student) (SENG) 1 from the SENG Website (asynchronous) Link: http://elearn.cerc.wvu.edu/
Projects
3. Working with a partner, prepare, conduct and video tape a 20 minute multimedia presentation in a distance education site of origin (your office, school, home or CERC). Select a topic of your choice. This will be a simulation of a satellite, videoconference or CMC distance education program.
Distance Learning Develop an online class
Satellite – Teaching in front of a camera w/mic where you are being broadcast and your students answer questions using a phone bridge.
Distance Learning Develop an online class
Videoconference – Teaching in front of a camera w/mic where you are being broadcast and your students also are being broadcast allowing total interaction.
Distance Learning Develop an online class
CMC – Teaching in front of a camera w/mic where you are being broadcast over the Internet and your students can interact using chat allowing minimal interaction.
Projects
4. Prepare: One of the pages of the TE601 web page.
Bill Duff, Jr.
Program Coordinator for Distance Learning Develop and manage distance learning courses and work with multimedia and distance learning projects for the Lane Department of
Computer Science and Electrical Engineering. Produce video for web and class applications, manage Electronic Classrooms with distance learning classes, and delivery of live Internet classes and classes on demand. Oversee management of departmental
web page. Manage uplinking facility at CERC/WVU. I also teach classes on Video Production for Training and Education and Distance Learning for the College of Human Resources and Education.
Dance Classes WVNET 2002 Presentation Poetry
Theme Song"Wow! I'm Wacky, I'm Crazy, I'm absolutely Dazy!"
Name Web Site Section Bond Links from lectures
Jin Syllabus Miller Main page Munson Technology
Nesselrotte Email Links O’Hara Main Page
Silverman Virtual Class Spataro Docs
Swearengen Related Links
Projects
5.Working alone, create an infrastructure development plan for an institution to improve their ability to use distance education/training. This must be based on an actual institution or facility.
Videoconferencing
2-way Video & 2-way Audio Cameras and mics Local fiber optics or similar hook up Allows teacher/student interaction Can accommodate large audiences
http://www.elearn.wvu.edu/IViN/index.htm
Videoconferencing
Preparation for videoconferencing Use bold, 14 point font or bigger Use landscape mode Use simple graphics Leave margin around page Wear colors, not white or stripes
Videoconferencing
Successful conferencing Distribute handouts beforehand Have info, phone #’s, connections Arrive early Transmission delay, respond accordingly Avoid papers, noise near mic’s Avoid side conversations At multipoint sites, mute mic when listening Wrap up time at end
Videoconferencing
Reasons to Use Conferencing Reduces the need for business travel.
Videoconferencing
Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper
Videoconferencing
Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper Cameras
Videoconferencing
Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper Cameras Improve productivity
Videoconferencing
Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper Cameras Improve productivity Interactivity
Videoconferencing
Advantages of Video Conferencing Establishes a connection between
participants Enables connection with external
resources Supports use of diverse media Document sharing facilitates
collaboration and feedback
Videoconferencing
Primary components: television cameras monitors microphones speakers communications network
Videoconferencing
communications network Coaxial cable Fiber optics ISDN T1 ATM IP Satellite DSL and Cable Modems
Videoconferencing
communications network Coaxial cable Used primarily between short distances
like court room and jail
Videoconferencing
communications networkFiber optics Used mainly as intranet like within a
university Consists of many strands of fiberglass
which conducts and can send large quantities of information
Videoconferencing
communications networkISDN Integrated Services Digital Network voice and data are carried by bearer
channels (B channels) bandwidth of 64 kb/s A data channel (D channel) = 16 kb/s H channel is 6 B channels = 384 kb/s
Videoconferencing
communications network ISDN
Basic Rate Interface (BRI) 2-B channels and 1-D = 144 kb/sPrimary Rate Interface (PRI) 23-B and 1-D = 1536 kb/s
ISDN telephone lines and codecs use the ITU H.320 standard
Internet (LAN/WAN) connections and codecs use the ITU H.323 standard
Videoconferencing
communications network T1 - high speed digital network (1.544 mbps)
developed by AT&T 64Kbps 1/24 of 1 Channel DS0T1 =1.544Mbps 24 Channels DS1 3.152 Mbps 2 T-1 48 Channels DS1CT2 = 6.312 Mbps 4 T-1 96 Channels DS2 T3 = 44.736 Mbps 28 T-1 672 Channels DS3 89.472 Mbps 56 T-1 1344 Channels DS3CT4 = 274.176 Mbps 168 T-1 4032 Channels DS4
Videoconferencing
communications networkATM - Asynchronous Transfer Mode Also known as cell relay Speeds - 2.5 Gb/s in operation, 10 Gb/s in limited use
and spanning up to 40 Gb/s in trials roughly 80 percent of the world's carriers use ATM
Videoconferencing
communications network IP
LAN – Local Area Networks WAN - Wide Area Networks MAN – Metropolitan Area Networks Allows point-to-point between computers or
codecs bandwidth of around 384-768kb/s is very
common Internet – bandwidth dependent
Videoconferencing
communications networkDSL and Cable Modems (Broadband
Services) DSL phone connections dedicated home
to provider's central office using copper wire
Residential ADSL - 1.5 Mbps http://www.videnet.gatech.edu/cookbook
//
Videoconferencing
Characteristics of communications channels
A. Types of signals: digital and analog B. Transmission modes: asynchronous
and synchronous C. Direction of transmission: simplex,
half‑duplex, full duplex D. Transmission rate
Videoconferencing
Communications equipment A. Modems B. Multiplexors C. Front‑end processors D. Network interface cards
References
http://www.anixter.com/ http://en.wikipedia.org/wiki/
Videoconferencing
http://edweb.sdsu.edu/triton/july/conferencing/Comparison_of_Conferencing.html
http://www.kn.pacbell.com/wired/vidconf/
Videoconferencing
Conclusion Conferencing technologies enable real-time interaction of
students and teachers with experts, collaborators, and organizations all over the globe. Conferencing is often more convenient and less expensive than travel, and a wider audience can be reached. Education can truly become a classroom without walls. The major limiting factors are bandwidth, technical training, and equipment and software expenditure.
One last word of advice is to always keep in mind that conferencing takes careful planning and preparation. Guest appearances must be arranged ahead of time, equipment must be checked out, set up, and tested, and participants need to learn the basics of the technology and its use.