What is macrovision?
Macrovision is a company that develops copy protection schemes for DVDs, VHS Tapes and Television Content. The DVDs and VHS tapes protected with macrovision schemes either cannot be copied or copied with fatal errors. For example if you try to coy a macrovision protected VHS tape using VCR the scheme is implemented in a way that it tells the VCR not to copy and recording fails.
VHS & DVD Protection
The protection is achieved by implanting physical synchronization vertical signals directly onto VHS tapes. But in case the signal is not physically stored on DVDs rather DVDs are associated with instructions that tell DVD players to create and impose such signals and cause hindrance in recording.
Protection against Macrovision
Since DVDs are not encoded physically by the signals so it is quite easy to get rid of macrovision scheme by just configuring the DVD player to not to bother about the instructions associated with macrovision. Moreover for video or VHS there are devices available as video stabilizers or enhancers that disables the macrovision spikes by detecting the encoded signals (vertical synchronization signals) and leveling them back to the original level.
Macrovision’s Rip-Guard
Early this year in February 2005 Macrovision introduced a new protection technology named as Rip-Guard and claimed that 97% of DVD rippers will fail to disable this technology.
Television & Macrovision
When it comes to television content protection macrovision also provides its services. Mostly TV video formats stores pictures on lines as these lines show image when put on screen. There are still 20-40 lines that are out of visible region. Macrovision neutralizes these lines and uses for protection by inserting pulses in this un-displayed region. This causes the recording in variable signal strengths and provides a faded non-viewable picture.
TiVo and Macrovision
The most advanced and used Technology for television content recordings, TiVo DVR, also recognize and support Macrovision’s copy protection schemes. The copy protection schemes are deployed by the content/program providers and are limited to specific programs like Pay-per-View, Video on demand or DVD/VHS sources. TiVo responds to the Macrovision’s following Copy protection rules:
- 7-day unlimited: The programs associated with this feature are record able and watch able within 7 days from the start of recording but must be disabled onwards both recording and viewing.
- 7 day/24 hours: The programs associated with this feature are record able within seven days but can be viewed only within 24 hours and disabled onwards.
- Copy Never: The programs protected with this feature can never be recorded.
from direct-tv4u.com
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