Group video conferencing Between128kps and 2Mbps. 384 kbps is providing a good quality reception for conferencing and is used in many educational environments. 2- 6 Mbps rates. The quality is greatly increased over the previous compression levels but costs are also higher HDTV 25-45 Mbps is adopted by High Definition Television. This is a relatively new technology and it is not universally accepted.
Some vendors provide equipment that can operate at a variety of compression levels.
Remember the more visuals and movements to be transmitted the greater the transmission requirements and hence the higher the cost of both transmission and site equipment. The advantage of this method is one of accessibility. However, this only allows 64 kbps transmission rates. This is relatively untested for education. The picture and sound quality will be poor and the picture jerky.