Here is what it is:
"The premise behind the Superbit concept is that if all but the minimum bit-consuming information, such as extensive menus and supplements, is removed, and if the maximum possible bit budget is dedicated to the video, the result will be a better looking DVD. So in this newly released Superbit Air Force One, gone are the alternative language tracks of Spanish and French, missing is the director's commentary, banished is the theatrical trailer. A second high performance audio track is added in the form of DTS 5.1, and the disc type is now DVD-9, a single-sided and double-layered with a capacity of 7.95 gigabits, nearly double the available space on the original release. This gave the Superbit compressionist the opportunity to reduce the level of compression and improve the appearance of the DVD. So does it work? Indeed it does."
"The premise behind the Superbit concept is that if all but the minimum bit-consuming information, such as extensive menus and supplements, is removed, and if the maximum possible bit budget is dedicated to the video, the result will be a better looking DVD. So in this newly released Superbit Air Force One, gone are the alternative language tracks of Spanish and French, missing is the director's commentary, banished is the theatrical trailer. A second high performance audio track is added in the form of DTS 5.1, and the disc type is now DVD-9, a single-sided and double-layered with a capacity of 7.95 gigabits, nearly double the available space on the original release. This gave the Superbit compressionist the opportunity to reduce the level of compression and improve the appearance of the DVD. So does it work? Indeed it does."