Videoconferencing is the conduct of a videoconference by a set of telecommunication technologies which allow two or more locations to communicate by simultaneous two-way video and audio transmissions. It has also been called 'visual collaboration' and is a type of groupware.
Conference system is not demanded like today .Conferences come in all shapes and sizes; . From intimate informal meetings, to major multi-lingual conferences with thousands of delegates, Conference Systems get people interacting and communicating effectively, and in a way that suits everyone.
For productive meetings, even in larger groups, conference systems are essential, as they provide maximum speech intelligibility and a structured dialogue.Today’s economy forces many companies to trim their travel budgets. For these organizations, video conferencing is the most sensible collaboration substitute to face-to-face meetings.
• Camera: Companies need more than just the usual USB camera commonly used in web conferencing systems; they need high-definition primary conferencing cameras with advanced features such as (a) remote control pan and (b) zoom and tilt features. Secondary, specialized, and document cameras may also be used in conjunction with video conferencing to convey information whose clarity needs to be preserved, such as in the case of education sectors and in medical applications. High-definition (HD) cameras are usually preferred, as they offer the highest resolutions and the largest images.
• Video Display: The most common displays are (a) LCD or HD Plasma Display, and (b) LCD/DLP Projector / XGA PC Type Display. Video conferencing systems may use more than one display option. Fact, many enterprise-level collaboration systems and large-venue video conferencing systems have several display tools that present different endpoints and data all together. The most preferred video displays are high-definition displays between 720p and 1080i / 1080p, as they provide the best resolution and allow about 20 percent more viewing area than standard / traditional definition display devices.
• Video Conferencing Codec Unit: Often called the “heart and the brain” of the video conferencing system, the CODEC (also called the coder-decoder) takes the audio and video from the microphone and the camera and then compresses it, transmits it via an IP network, and decompresses (expands) the incoming audio and video signal or viewing on the video display device.
• . Microphone / Audio Sub-System:Basic enterprise-level video conferencing and collaboration systems use analog microphone pods, which are optimal for the use of a small group. In intermediate video collaboration systems, there is usually a conference phone – gated “array” of digital microphones – which are designed to run on integrated software. This software enhances the system’s audio capabilities. If the video conferencing is applied to larger rooms / venues, there needs to be an independent cancellation system for audio echo, and many microphones are usually connected to the integrated collaboration system to help facilitate large group interaction.
