DPL is produced by taking a two channel source and extracting the center and surround information from the source. A limited surround effect is produced though, roughly equivalent to a 4.0 soundtrack. However, Dolby changed the name to make things easier for consumers. Dolby Digital was the first 5.1 channel surround sound format available on DVD, and it is still the standard. This creates 5.1 sound.
Sound quality is usually excellent, and it easily rivals the sound produced by CDs.
A high-end television system that produces a huge picture with excellent image quality. In addition, image quality can be improved even further by adding a line doubler, but they are expensive as well. Most FPTV system also include support for HDTV . FPTV also require lots of maintenance, and this maintenance can often be several times a year and expensive. There is another type of FPTV system though.