Sony, which created the multi-disc DVD/CD category with the industry's first five-disc changer, is now introducing the DVP-C670D, an advanced five-disc changer.The new DVP-C670D model offers Sony's exclusive Disc Explorer feature as well as a new Custom Parental Control system. Unlike conventional systems, which require a DVD disc to be encoded with a Motion Picture Association of America rating, DVD-Video titles can now be accessed and individually locked. This feature can be used for controlling up to 200 discs. Preferences stored in the unit's memory are maintained even when the power is turned off. The DVP-C670D features Picture …