Dolby Digital 5.1
System Compression Digital that advertises five channels totally independent for the main lines, the plant, the two rear channels and a dedicated sub-woofer frequencies called "LFE" (Low Frequency Effects), from a reader DVDA satellite receiver or digital cable. This system allows to maintain the momentum and bandwidth Post originally released in theaters under the symbol "Dolby SRD "(D for digital). The result is significantly better than that obtained in Dolby Prologic I or II, since the system contained six messages (those vested with the subwoofer) fully differentiated from registration.
Dolby Prologic
Method Analog that can reconstruct surround sound on four channels from a stereo signal. It is still widely used on television, on DVD and video games. Most devices that use it is often able to reconstruct a signal to the subwoofer, but it is not separated on the original post.
Dolby Prologic 2: Evolution of the former, he is able to reconstruct a multichannel environment five speakers from a stereo signal not encoded in advance like a CD or radio. On a film soundtrack encoded in Dolby Prologic, it provides a better distribution of effects back through the recreation of a stereo signal, still limited in the treble, instead of a single mono channel.
Domotique
Ensemble des technologies de l'électronique de l'information et des télécommunications utilisées dans les domiciles. Elles visent à assurer des fonctions de sécurité, de confort, de gestion d'énergie et de communication qu'on peut retrouver dans une maison.
DON: digital optical disk.
DRCS (Dynamically Reconfigurable Character Set)
Character alphamosaïques dynamically redefined.
In France, you can have with the DRCS Minitel 2 and some minitels 12. Try 3615 ROQUE, for example.
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