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Video conferencing actually encompasses a range of technologies used in a wide range of situations, often it is not just video and audio that is transmitted, but also data, allowing collaborative working though shared applications. All of this means having sufficient bandwidth supporting your network is the critical performance factor.

Video conferencing may be……

* One-to-one meetings, also known as point to point communications, usually involving full two-way audio and video.

* One-to-many involving full audio and video broadcast from the main site, where other sites may be able to send audio. For example in a lecture situation, students could ask questions.

* Many-to-many, known as multi-point communication, provides audio and video between more than two sites. With most multi-point systems only one site in a conference can be seen at time, with switching between sites either controlled manually or voice activated (i.e., the loudest site is on screen).

Physically, the most common scenarios of video conferencing are:

* desktop video conferencing – usually a small camera is located on top of the PC or workstation monitor. The actual video is usually displayed in a small window, and shared applications, such as a shared whiteboard are often used.

* studio-based systems – a studio is specially equipped for video conferencing. This will normally include one or more cameras, microphones, one or more large monitors, and possibly other equipment such as an overhead camera for document viewing. Usually used for more formal meetings

In practice a ’studio’ may not be a dedicated room, but a standard seminar room with portable equipment that can be set up when required.

Bandwidth and Compression……

The bandwidth, or baud rate, is the amount of information which can be transmitted every second. The higher the bandwidth, the better quality the signal that can be transmitted. For a video conference audio and video signals must be transmitted in real time, i.e., a lot of information has to be sent every second, requiring a very high bandwidth. For example a ‘true colour’ image will need 24 bits (3 bytes) per pixel. A full screen image might be 640×480 pixels, over 7 million bits. For full motion video, the image is refreshed 25 times per second. This adds to over 184 million bits per second. It is not realistically possible to transmit this amount of information, and your PC certainly could not receive it at this rate. Therefore for digital video some form of compression is required. The type and degree of compression used varies from system to system. It is interesting to note that for most uses, we are more tolerant of poor video than poor audio, and so some systems concentrate on providing consistently good audio.

How To Get The Right Bandwidth To Meet Your Needs…….

Don’t take a chance at guessing what bandwidth you’ll need…..or in selecting the provider for that bandwidth. You may need a fractional, full, integrated, or bonded T1, DS3, or OC3 network depending on many factors. Solutions offered by providers will vary by cost, Quality of Service (QoS), and Service Level Agreement (SLA). I strongly recommend you use the services of an independant Telecommunications Consultant to help you assess your needs and find the provider who best meets your requirements. For unbiased free advice….as well as real time rate quotes from multiple providers, indepth research, and negotiations with providers on your behalf….I recommend you use FreedomFire Communications.

Michael is the owner of FreedomFire
Communications….including DS3-Bandwidth.com and Business-VoIP-Solution.com. Michael also authors Broadband Nation where you’re always welcome to drop in and catch up on the latest BroadBand news, tips, insights, and ramblings for the masses.

Nokia have decieded that they want to release a device in unknown territory, the netbook market. Nokia have courageously entered the fiercely competitive notebook computer market with their 3g computer called ‘The Booklet’. They hope their fantastically strong brand name, and the increasing association between cellular telephones and the internet will put them in a strong place to compete with competitors such as Dell, Acer, Asus, and Sony.

Features of the Nokia Booklet include built-in 3g hardware, bluetooth and wireless network receiving systems, an Intel Atom Z530 processor, and a GPS receiver The 10 inch display is set perfectly with in the fashionable case, and the battery life of 10 hrs is a real bonus for owners of the device. There is speculation about the timing for the announcement of the Nokia Booklet, which will probably include information about the specs and release date. Early indications are suggesting the beginning of September.

The notebook market has matured significantly over the last few years, largely because the uptake of 3G technology; offering users access to the internet whilst on the go. It looks as if the inclusion of a 3g receiver within the device’s internal features is the way all laptops and notebooks will be going, whereas previously, an external USB dongle has been required to supply internet to laptop computers on the go. There are still many 3g free laptop deals available on the marketplace for savvy shoppers, where a mobile broadband contract can be bought that comes with a free laptop computer or notebook.

For existing laptop owners who want to economically take advantage of mobile broadband, there are many pay as you go mobile broadband deals.

The Booklet should be in instant win with prospective buyers in the notebook computer market, with its stunning technology features, and dazzling design. The notebook market looks set to proceed with it’s growth by offering affordable stunning technology. You will no longer need a home office, or a large thick laptop computer to use the internet in the home. The world wide web can be browsed from anywhere in the house with little or no bother. With a stroke of luck, we should see 3g technology being included onboard most new netbooks and laptops.

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