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Video Conferencing & Telepresense

To keep growing needs of converged communication, we at Wizertech, has developed a niche expertise on Video-Conferencing, delivering end-to-end rich media collaborative applications for voice, video, data and the web from desktop and mobile personal systems to room systems to the network core. Our vision is to enable people to connect anytime, anyplace and with any device in a virtual experience as natural as being there.

In addition to the data network, our leadership and market capitalization is growing fast in terms of complete solution suit for delivering Unified Collaborative Communications – the convergence of voice, video, data and web.


The core technology used in a video-tale-conference (VTC) system is digital compression of audio and video streams in real time. The hardware or software that performs compression is called a codec (coder/decoder). Compression rates of up to 1:500 can be achieved. The resulting digital stream of 1′s and 0′s is subdivided into labeled packets, which are then transmitted through a digital network of some kind (usually ISDN or IP). The use of audio modems in the transmission line allow for the use of POTS, or the Plain Old Telephone System, in some low-speed applications, such as video-telephony, because they convert the digital pulses to/from analog waves in the audio spectrum range.

The other components required for a VTC system include:

  1. Video input : video camera or webcam
  2. Video output: computer monitor , television or projector
  3. Audio input: microphones
  4. Audio output: usually loudspeakers associated with the display device or telephone
  5. Data transfer: analog or digital telephone network, LAN or Internet


We integrate the system and our engineers are capable to maintain the international standards for conferencing such as:

The International Telecommunications Union (ITU) (formerly: Consultative Committee on International Telegraphy and Telephony (CCITT)) has three umbrellas of standards for VTC.

ITU H.320 is known as the standard for public switched telephone networks (PSTN) or VTC over integrated services digital networks (ISDN) basic rate interface (BRI) or primary rate interface (PRI). H.320 is also used on dedicated networks such as T1 and satellite-based networks;

ITU H.323 is known as the standard for video over Internet Protocol (IP). This same standard also applies to voice over IP VoIP);

ITU H.324 is the standard for transmission over POTS, or audio telephony networks.

In recent years, IP based videoconferencing has emerged as a common communications interface and standard provided by VTC manufacturers in their traditional ISDN-based systems. Business, government and military organizations still predominantly use H.320 and ISDN VTC. Though, due to the price point and proliferation of the Internet, and broadband in particular, there has been a strong spurt of growth and use of H.323, IP VTC. H.323 has the advantage that it is accessible to anyone with a high speed Internet connection, such as DSL.

In addition, an attractive factor for IP VTC is that it is easier to set-up for use with a live VTC call along with web conferencing for use in data collaboration. These combined technologies enable users to have a much richer multimedia environment for live meetings, collaboration and presentations.


Telepresence refers to a set of technologies which allow a person to feel as if they were present, to give the appearance that they were present, or to have an effect, via telerobotics, at a place other than their true location.

Telepresence requires that the users’ senses be provided with such stimuli as to give the feeling of being in that other location. Additionally, users may be given the ability to affect the remote location. In this case, the user’s position, movements, actions, voice, etc. may be sensed, transmitted and duplicated in the remote location to bring about this effect. Therefore information may be traveling in both directions between the user and the remote location.

A popular application is found in Telepresence videoconferencing, a higher level of video telephony which deploys greater technical sophistication and improved fidelity of both video and audio than in traditional videoconferencing.


An industry expert described some benefits of telepresence: “There were four drivers for our decision to do more business over video and telepresence. We wanted to reduce our travel spend, reduce our carbon footprint and environmental impact, improve our employees’ work/life balance, and improve employee productivity.”

Rather than traveling great distances in order to have a face-face meeting, it is now commonplace to instead use a telepresence system, which uses a multiple codec video system (which is what the word “telepresence” most currently represents). Each member/party of the meeting uses a telepresence room to “dial in” and can see/talk to every other member on a screen/screens as if they were in the same room. This brings enormous time and cost benefits. It is also superior to phone conferencing (except in cost), as the visual aspect greatly enhances communications, allowing for perceptions of facial expressions and other body language.

telepresence has been described as the human experience of being fully present at a live real-world location remote from one’s own physical location. Someone experiencing video telepresence would therefore be able to behave, and receive stimuli, as though part of a meeting at the remote site. The aforementioned would result in interactive participation of group activities that would bring benefits to a wide range of users.