Video Conferencing

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  • Topic: World Wide Web, Videotelephony, H.323
  • Pages : 6 (2185 words )
  • Download(s) : 310
  • Published : January 26, 2011
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Video Conferencing

One could say that the ability to communicate is a key to success. Merriam Webster’s defines communication as a verbal or written message and also the technology of the transmission of information (as by print or telecommunication) ( There are various ways people communicate today, face-to-face, on the phone, the Internet, radios, television to name a few. This paper will focus on one mode of communication called Video Conferencing. This paper will provide a detailed description of Video Conferencing, discuss the technology involved, future trends, companies involved, imposed regulations and global implications. Detailed Description

Many companies are joining the bandwagon and getting onboard with the technology of video conferencing for their businesses. Video Conferencing is the use of technology where people can communicate with each other with voice and video from one location to another. Recently, desktop systems and even IP-phone are being introduced into the market to also be used. The International Telecommunications Union (ITU) creates the H.323 protocol standards or video conferencing standards. “The H.323 is the international standard for multimedia communication over packet switched networks, including LANs, WANS, and the Internet. It was first defined by the ITU in 1996 and has been updated regularly” ( The H.323 includes other standards like H.225.0, H.245, H.450, H.460, and allows use of T.120 for data transfer. T.120 provides real-time connection or communication between two or more personnel. This includes: application sharing, white boarding, file exchange, and chat. Video conferencing was first originally developed for at house networks. The demand for further reaching became a must and want for many of the businesses. There are three types of conferences. The first is a person to person. This is used mainly with two computers talking to each other. The second is a group conference. This is usually a larger group of people in a videoconference room conducting presentations and holding meetings. The third is called broadcast. Broadcast is mainly just a one-way presentation out to other people. NASA TV is an example of Broadcast conference. Many videoconferences use either ISDN or IP-based videoconferencing and streaming media. ISDN (Integrated Services Digital Network) are the preferred use for video conferencing due to being able to use around 128-384 Kbps (kilobits per second). ISDN is a high quality service that gives a normal phone line the ability to transmit voice and data simultaneously. IP based video systems can use bandwidth of 384-768Kbps. There are five network problems that could be encountered with video conferencing. The first is bandwidth. There must be enough bandwidth so the all the packets can get from one side to the other unimpeded and must be symmetric. “The audio/video information within a videoconference is segmented into chunks by the application, encoded and compressed, put into series of data packets and send over the network to the remote end at basically constant intervals” ( The second problem is packet loss. Packet loss can be due to not enough bandwidth or even just errors in the transmission. The third is latency or time delay. This is the time delay from which one user will say something and it will have a pause period before the end use will receive the transmission. The fourth is called jitter. Jitter is the variation in latency because many processes are running at the same time on the same terminal. The fifth and final is Policies. Policies are firewalls and network address translation devices used to protect from the Internet. These can cause many problems with the video conferencing.

Video Conferencing Technology(Pat)

Future Trends(Pat)
Companies involved (Accenture)
Today, when teams of engineers, designers or scientists collaborate on a...
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