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The Auxiliary (AUX) Input, located in the Lectern Workstation above the VCR, can be used to connect additional video or audio equipment for classroom use such as:
NOTE: Video equipment must produce a composite signal to be used from this connection. Video and audio equipment must use cables/connectors that are compatible with the ports on the Auxiliary Input panel.
Allows pre-defined camera angles to be programmed into a videoconferencing system.
In the NETnet rooms, the student camera is located on the front wall, and the teacher camera is located between the TV monitors in the back of the classroom. The document camera is located on the right side of the Lectern Workstation.
Coder-Decoder. Videoconferencing hardware that codes the outgoing video and audio signals and decodes the incoming signals. The CODEC is located in the Lectern Workstation.
When the vast amount of information in a normal tv transmission is squeezed into a fraction of its former bandwidth by a codec, the resulting compressed video can be transmitted more economically over a smaller carrier. Some information is sacrificed in the process, which may result in diminished picture and sound quality.
A feature supported by many desktop videoconferencing systems that allows participants at both ends of a videoconference to view and edit the same computer document.
Audio/video signals represented by discrete variations (in voltage, frequency, amplitude, location, etc.). A digital clock, for example, displays the time as discrete numeric values rather than angular displacement of analog hands. In general, digital signals can be transmitted faster and more accurately than analog signals. As an example, music from digital cd's is usually more clear than music from analog records. (Contrast with analog signals.)
Process of eliminating acoustic echo in a videoconferencing room.
Frequency in which video frames are displayed on a monitor, typically described in frames-per-second (fps). Higher frame rates improve the appearance of video motion. Broadcast TV (full motion video) is 30 frames-per-second.
2-way audio simultaneously transmitted and received without any interference or "clipping." A common feature of room-based videoconferencing systems.
Full motion video is equivalent to broadcast television video with a frame rate of 30 fps. Images are sent in real time and motion is continuous.
A widely-used video compression standard that allows a wide variety of videoconferencing systems to communicate.
Hybrid courses are a combination of two or more of the types of distance learning courses (e.g., web, email, ITV ) with traditional classroom instruction. Hybrid courses have a website, and although they have several face-to-face class sessions, most assignments and communication with the instructor take place by email.
Web-based course completed online
Stands for Integrated Services Digital Network. ISDN is essentially a digital network that will provide seamless communications of voice, video, and text between individual desktop videoconferencing systems and group videoconferencing systems
Two-way audio and/or video; videoconferencing
The LCD Control Panel is located on top of the Lectern Workstation. The instructor touches electronic buttons on the screen to control room and system operations.
The LCD video projector displays images on the front video projection screen, and is mounted on the ceiling in each room.
The number of microphones will vary by site. Pressing the “TOUCH” button on the front of the microphone will turn the mike ON/OFF. A red light means the mike is on.
Videoconference with more than two sites. The sites must connect via a video bridge.
Videoconference between two sites
In the NETnet rooms, the front projection
screen displays images sent from the ceiling-mounted LCD video projector.
Videoconferencing using a sophisticated system. Appropriate for large groups
TV monitors are located at the back of the NETnet room and display the remote and local sites.
Videotaped course lectures
The VCR is located in the Lectern Workstation. A videotape may be shown by the instructor during a videoconference or a local presentation. Class activity may be recorded during a videoconference or a local presentation. NOTE: Since there is only one VCR, the instructor cannot simultaneously record and play a tape. See Auxiliary (AUX) Input for more details.
The Virtual College of Texas. VCT is a collaborative of Texas' 50 community college districts and the Texas State Technical College System. Through VCT, students may register at their local college to take credit and non-credit distance learning courses from other colleges throughout Texas.
Computerized switching system which allows multipoint videoconferencing.
Communication across long distances with video and audio contact that may also include graphics and data exchange.
Can be online or via videoconferencing. If online, the class uses a web site created by the instructor to "visit" a setting by viewing pictures, video and/or audio clips, and reading the text provided. If via ITV, the class is connected to experts in a particular field or to other student 'hosts" at a remote location, all via videoconference.
An inquiry-oriented activity in which most
or all of the information used by students is online. By providing links necessary
to complete the quest, the student is able to focus on the material rather
than spend time looking for it. The five-part WebQuest (Introduction, Task,
Resources, Process, Evaluation, and Conclusion) promotes critical thinking
at the levels of analysis, synthesis and evaluation.
Each NETnet whiteboard is connected to the Lectern Workstation PC via a pod located in the upper corner of the board. All whiteboard markings made using the specialized whiteboard components can be saved to the Lectern Workstation PC in several popular file formats. The whiteboard components (erasers/markers) are found in the pullout storage drawer located in the Lectern Workstation.
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The Northeast Texas Network Consortium
Coordinating Office / 11937 Hwy 155 at Hwy 271 / Tyler, TX 75708
phone (903) 877-7510 / fax (903) 877-7430
