Practical TCP/IP and Ethernet Networking- P47: The transmitter encodes the information into a suitable form to be transmitted over the communications channel. The communications channel moves this signal as electromagnetic energy from the source to one or more destination receivers. The channel may convert this energy from one form to another, such as electrical to optical signals, whilst maintaining the integrity of the information so the recipient can understand the message sent by the transmitter | 212 Practical TCP IP and Ethernet Networking with whom they are working. It is possible to incorporate live action color video and voice with shared workspace on the PC screen over the Internet. VidCall uses anyone of over 25 inexpensive video capture boards including digital plug and play cameras to transmit still and motion video. Depending on the speed of the computer modem VGA display and LAN WAN virtual motion of up to 10 frames per second is achievable. Multi-point video and document conferencing is available over LAN WAN accommodating up to 10 participants who can be located across the globe. VidCall also supplies additional freeware for registered VidCall users on the Internet. WhoIsThere enables individuals to setup their own user groups and to be informed as soon as members of their group are logging in to the video conference. Video networking Another company providing video networking and video conferencing software is BitField. BitField claims to be the first company to have provided a complete H320 compatible video codec on a single PC video adapter board. Their video communication products turn PCs into video communication workstations transferring full motion video between standard PCs via ISDN LANs and other communication networks. Since the products utilize existing PC and networking technology they can be applied in many areas where traditional video equipment is too expensive and flexible. News News push The original approach to news via the Internet has been to search the World Wide Web and pull down relevant news items. This is not only time consuming but also costly for an individual who has to connect through an ISP. On the other hand products such as PointCast aggregate news from more than 700 sources process this in a central broadcast facility and then broadcast it world-wide via the Internet. Only the news categories selected by the user is PUSHED down for collection every morning. PointCast delivers national .
