An IPTV signal is a stream of data packets traveling across the Web.Internet TV is relatively new -- there are lots of different ways to get it, and quality, content and costs can vary greatly. Shows can be high-quality, professionally produced material, while others might remind you of Wayne and Garth broadcasting "Wayne's World" from their basement. Traditional TV networks are also easing into the technology and experimenting with different formats. Internet TV, in simple terms, is video and audio delivered over an Internet connection. It's also known as Internet protocol television, or IPTV. You can watch Internet TV on a computer screen, a television screen (through a set-top box) or a mobile device like a cell phone or an iPod. It's almost the same as getting television through an antenna or a series of cable wires -- the difference is that information is sent over the Internet as data. At the same time, you can find even more variety on Internet TV than cable TV. Along with many of the same shows you find on the big networks, many Web sites offer independently produced programs targeted toward people with specific interests. Internet Protocol Television (known widely as IP TV), being the newestarrival on the block, threatens the other two mediums by promising to give a toughcompetition. IP TV is a mechanism of viewing the regular television channels over IP.Similar to Satellite TV and Cable TV, the signal is encrypted using vendor specificsecurity mechanisms and can only be decrypted by a receiver (STB). The video is sentin the form of IP packets over the existing broadband infrastructure and is assembledat the viewers’ end with the help of a Set Top Box.