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One of the sub-channels — the Q-channel — states the drive's current position relative to the beginning of the CD and the current track. This was designed for Audio-CDs (which for a few years were the only CDs), where this information is used to keep the drive on track; nevertheless the Q-channel is filled even on Data-CDs.
Xbox (DVD) Two sets of media descriptors are used. Initially, and on typical DVD-ROM drives, only a short partition containing a brief DVD Video can be seen. The lead-out section of the disk stores a second set of media descriptors describing the bounds of the main partition. It also contains a partially-encrypted "security sector" used for ...
Discs made with DVD copying programs such as DVD Shrink automatically disable any Macrovision copy protection. The ease with which Macrovision and other copy protection measures can be defeated has prompted a steadily growing number of DVD releases that do not have copy protection of any kind, Content Scramble System (CSS) or Macrovision.
Copy Control Information (CCI) is a two byte flag included in digital television streams that allows content owners and cable operators to specify how content can be duplicated. Originally defined as part of the 5C copy protection specification devised by DTCP working group back in 1998, it was later defined as part of the FCCs Plug and Play ...
DVD X Copy products are still being sold on the DVD X Copy website, although it was previously believed to be no longer sold or supported. This DVD copy software program was created by 321 Studios. The DVDXCopy product line included DVD X Copy, DVD X Copy Xpress, DVD X Copy Gold and DVD X Copy Platinum. DVD X Copy Xpress enabled consumers to ...
The DVD Copy Control Association (DVD CCA) is an organization primarily responsible for the copy protection of DVDs. The Content Scramble System (CSS) was devised for this purpose to make copyright infringement difficult, but also presents obstacles to some legitimate uses of the media.
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The same general situation applies to digital cable service; only DVD recorders with integrated digital cable ("QAM") tuners can avoid transcoding, and then only if the digital cable system is already sending a DVD-Video-compatible MPEG-2 stream, which again requires transcoding of all HD content and some if not all SD content.