itally trans- ported, requires approximately 200Mbps. The SECAM system is used in France and the former French colonies, as well as in parts of the Middle East. Russia and the former Soviet-allied countries use a modified form of SECAM. There are two versions of SECAM: SECAM vertical and SECAM horizontal. The PAL and SECAM standards provide a sharper picture than NTSC, but they display a bit of a flicker because they have a slower frame rate. Programs produced for one system must be converted in order to be viewed on one of the other sys- items. The conversion process detracts slightly from the image quality, and con- verted video often has a jerky, old-time-movie look. DTV represents the ongoing convergence of broadcasting and computing. Simply put, DTV makes use of digital modulation and compression to broadcast audio, data, and video signals to TV sets. Thanks to MPEG-2, studio-quality images can be compressed and transformed into a digital stream. DTV is the next generation of television; its development has improved the audio and video quality of broad- cast television, and it has in many cases replaced the film cameras used in movie production. Chapter 10 Next-Generation Networks The difference between analog TV and DTV is profound in terms of picture quality as well as special screen effects, such as multiple-windowed pictures interactive viewer options. The quality of DTV is almost six times better than what analog TV offers, delivering up to 1,080 lines of resolution and CD-quality sound. But the real promise of DTV lies in its huge capacity: the ability to deliver, during a single program, information equivalent to that contained on dozens of CDs. The capacity is SO great that whole new industries are being created to use this digital potential for whole new revenue streams. Recognizing that the Web and other Internet services may grow to rival television, it is highly likely that new genera- tions of television system infrastructure design will include this medium as part of the total system-making tel