of tape. For this reason, a DF-240 will record 240 minutes of standard definition, and 240/2 = 120 minutes of high definition. When reviewing the table, note that the digital speeds HS and STD are equivalent to the older analog speeds SP and LP. Pre-recorded tapes In 2002, prerecorded D-VHS cassettes were sold under the brand name D-Theater in the US. While D-Theater is a D-VHS tape, it is incompatible with D-VHS decks not bearing the D-Theater logo. They provide content in both 720p and 1080i as well as at least one Dolby Digital audio track. Supported films studios include 20th Century Fox, Artisan Entertainment, DreamWorks, and Universal Pictures. D-Theater does have region code restrictions. There are 3 known regions; 1 for the USA, 2 for Japan, and 3 for South Korea. There has never been a D-Theater video release in region 2 or 3. Region code hacks for Japanese decks have been performed to support playback of US titles. The last film available was 20th Century Fox's I, Robot. This title was a surprise to many as there were no prior announcements nor any indication that the title was available. It was originally available only on JVC's D-VHS store in late 2004 and no other distributor had it (not even Fox itself). A couple of weeks later they started trickling out to more distributors after much delay and confusion about its existence. Alien vs. Predator was announced to retailers as also being released on the same day as I, Robot, but Fox later announced that Alien vs. Predator was never shipped to retailers. Most tapes have built-in copy protection mechanism (DTCP, also known as "5c") (copy never) that disables copying via FireWire. HDNet productions and 2929 Entertainment via Magnolia Entertainment did provide some of their original content on D-VHS but without copy protection. Many of the tapes have an introduction by owner Mark Cuban encouraging the viewer to make copies of the program in order to help distribute them. Additional tracks may be included on D-Theater in other sound formats such as DTS. However, only the newest D-VHS players, like the JVC HM-DH40000, HM-DH5U, HM-DT100U, and Marantz MV-8300, include alternate audio track capabilities. Compatibility There are technical issues with compatibility between recordings from Mitsubishi and JVC D-VHS decks. PAL and NTSC recordings are also incompatible. Adoption Very few models were available to the world market and sales of this