Video Conferencing
Table of Contents:
- Video Conferencing
- Components of a V. C. system
- Classification
- Architecture
- Protocols
- Network Topologies
- Standards
- Issues in Implementation
- Applications & Conclusion
Components of a Generic Video Conferencing System:
Video Input: Webcams connected to computers or video cameras to capture the motion of participants.
Audio Input: Microphones to convert the voice of participants into an electrical signal which is then converted into a digital signal during processing.
Processing Unit: A data processing unit performs the function of converting the data into a packet stream for transmission on the transmitting end, and for receiving the network data and converting it into a presentable format on the receiving end.
Transmission Medium: The communication channel over which the data is transmitted from one place to another. It can be a telephone network or a digital internet broadband network. The network also might contain firewalls which are designed to block any kind of unwanted network traffic. Appropriate modules like Session Border Controllers are usually used on the network to detect various kinds of packets and to allow the videoconference packets to pass.
Output Unit: The output terminals are connected to the receiver unit to present the output in a suitable format. These are usually a monitor or screen for displaying the video and speakers to deliver the sound from the other end.
Usually, all the components are present both in the transmission location and the receiving location as communication is bidirectional.
Comments (2)
thank you for informationAT&T
thank you for information
AT&T was the first to research the possibility of videoconferencing using an ordinary telephone network in the 1950s, but the research did not bear much fruit owing to the lack of technology. The bandwidth and digital transmission techniques for achieving high bitrates for the transmission of slow scan videos did not exist then
It's really thankful to the
It's really thankful to the one who has invented this technology. As described above Video Conferencing Software is a technology making things from impossible to possible. There are many rural areas who cannot reach out for good education and so were illiterate but with this new technology, now everyone can get a good education from their own place.