H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/913 (2006.01)
Patent
CA 2417180
Enhancements to a video anticopying process that causes an abnormal low amplitude video signal to be recorded on an illegal copy. The enhancements in one version introduce into the overscan portion of the television picture, just prior to the horizontal or vertical sync signals but in active video, a negative going waveform that appears to the television receiver or video tape recorder to be a sync signal, thereby causing an early horizontal or vertical retrace. One version provides (in the right overscan portion of the picture), a checker pattern of alternating gray and black areas which causes the TV set on which the illegal copy is played to horizontally retrace earlier than normal in selected lines with a consequential horizontal shift of the picture information on those lines. This substantially degrades picture viewability. In another version a gray pattern at the bottom overscan portion of the picture causes vertical picture instability. In another version selected horizontal sync signals are narrowed, causing irregular vertical retraces. Also provided is apparatus for removing or attenuating these enhancements from the video signal, to allow copying.
Kirby Eades Gale Baker
Macrovision Corporation
LandOfFree
Method and apparatus for reducing a copy protection process... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing a copy protection process..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing a copy protection process... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1501480