Digital transmission of video and audio signals over an optical-fibre system

1979 ◽  
Vol 49 (12) ◽  
pp. 629 ◽  
Author(s):  
N.H.C. Gilchrist
Keyword(s):  
Optical Fibre ◽  
Digital Transmission ◽  
Audio Signals ◽  
Video And Audio

Outreach Opportunities Using the Instructional SEM at Iowa State University

1996 ◽  
Vol 54 ◽  
pp. 412-413
Author(s):  
L. S. Chumbley ◽  
M. Meyer ◽  
K. Fredrickson ◽  
F.C. Laabs
Keyword(s):  
Materials Science ◽  
State University ◽  
Digital Cameras ◽  
Audio Signals ◽  
Iowa State University ◽  
Cornell University ◽  
Sem Image ◽  
Local Schools ◽  
Materials Science And Engineering ◽  
Video And Audio

The development of a scanning electron microscope (SEM) suitable for instructional purposes has created a large number of outreach opportunities for the Materials Science and Engineering (MSE) Department at Iowa State University. Several collaborative efforts are presently underway with local schools and the Department of Curriculum and Instruction (C&I) at ISU to bring SEM technology into the classroom in a near live-time, interactive manner. The SEM laboratory is shown in Figure 1.Interactions between the laboratory and the classroom use inexpensive digital cameras and shareware called CU-SeeMe, Figure 2. Developed by Cornell University and available over the internet, CUSeeMe provides inexpensive video conferencing capabilities. The software allows video and audio signals from Quikcam™ cameras to be sent and received between computers. A reflector site has been established in the MSE department that allows eight different computers to be interconnected simultaneously. This arrangement allows us to demonstrate SEM principles in the classroom. An Apple Macintosh has been configured to allow the SEM image to be seen using CU-SeeMe.

Headset for presenting video and audio signals to a wearer

1998 ◽  
Vol 103 (5) ◽  
pp. 2257
Author(s):  
Paul J. Travers ◽  
Robert E. Taylor
Keyword(s):  
Audio Signals ◽  
Video And Audio

Telemedicine in Rural Areas. Experience with Medical Desktop-Conferencing via Satellite

1995 ◽  
Vol 1 (4) ◽  
pp. 224-228 ◽  
Author(s):  
J Ricke ◽  
L Kleinholz ◽  
N Hosten ◽  
W Zendel ◽  
A Lemke ◽  
...  
Keyword(s):  
Rural Areas ◽  
Satellite System ◽  
Magnetic Resonance Images ◽  
Echo Cancellation ◽  
Digital Data ◽  
Audio Signals ◽  
Data Channel ◽  
Medical Academy ◽  
Video And Audio ◽  
Desktop Conferencing

Cooperation between physicians in hospitals in rural areas can be assisted by desktop-conferencing using a satellite link. For six weeks, medical desktop-conferencing was tested during daily clinical conferences between the Virchow-Klinikum, Berlin, and the Medical Academy, Wroclaw. The communications link was provided by the German Telekom satellite system MCS, which allowed temporary connections to be established on demand by manual dialling. Standard hardware and software were used for videoconferencing, as well as software for medical communication developed in the BERMED project. Digital data, such as computed tomography or magnetic resonance images, were transmitted by a digital data channel in parallel to the transmission of analogue video and audio signals. For conferences involving large groups of people, hardware modifications were required. These included the installation of a video projector, adaptation of the audio system with improved echo cancellation, and installation of extra microphones. Learning to use an unfamiliar communication medium proved to be uncomplicated for the participating physicians.

System test of digital DBS system for video and audio signals

1999 ◽  
Vol 45 (2) ◽  
pp. 187-191 ◽  
Author(s):  
W. Sohn ◽  
J.H. Kim
Keyword(s):  
Audio Signals ◽  
Video And Audio
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