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Macrovision Corp Patents
Assignee:
Macrovision Corp
Address:
Santa Clara, CA
No. of patents:
10
Patents:












Patent Number Title Of Patent Date Issued
6711261 Enhancing concealment in the presence of fine mistuning for various TV scrambling techniques March 23, 2004
An improved method and apparatus for maintaining concealment for a scrambled signal when frequency pre-emphasis is used to defeat the scrambling. The pre-emphasis may be synthesized with high pass or peaking circuitry. More commonly however the pre-emphasis is available in television
6516132 Method and apparatus for improving the effects of color burst modifications to a video signal February 4, 2003
In the known color stripe process for preventing recording of video signals, the color burst present on each line of active video is modified so that any subsequent video tape recording of the video signal shows variations in the color fidelity that appear as undesirable bands or str
6424716 Method and apparatus for improved horizontal and vertical overlay signals for greater concealmen July 23, 2002
Video signals are scrambled by position modulating or switching between two types of modified horizontal sync pulses. These modified horizontal pulses are modulated or switched at a rate that causes a non-interlaced tearing pattern when viewed by an unauthorized viewer, whereby greater c
6381747 Method for controlling copy protection in digital video networks April 30, 2002
A method and system of providing copy protection of video analog and digital signals and the like, wherein the signals are transmitted via a digital delivery network, and may comprise, for example, pay per view (PPV) program materials protected by copyrights of respective program rig
6381367 Method and apparatus for compression compatible video fingerprinting April 30, 2002
Fingerprinting and fingerprint detection, techniques are described which, unlike typical fingerprint systems used to conceal video signals, are compatible with all conceivable forms of signal compression systems while still allowing viewing of the video signal. The fingerprint technique
6327422 Method and apparatus for modifying the effects of color burst modifications to a video signal December 4, 2001
In the known color stripe process for preventing recording of video signals, the color burst present on each line of active video is modified so that any subsequent video tape recording of the video signal shows variations in the color fidelity that appear as undesirable bands or str
6058191 Method and apparatus for modifying the envelope of a RF carrier signal to remove copy protection May 2, 2000
A method and apparatus is disclosed for disabling the effect of copy protection signals embedded in video signals, wherein the detection and modification of the copy protection signals is accomplished in the RF domain rather than in the baseband video domain as typically accomplished
5953417 Method and apparatus for digitally removing or defeating effects of copy protection signals from September 14, 1999
Video signals in today's environment exist in both the analog domain and the digital domain. In many instances it may be desirable to delete or reduce the effectiveness of a video signal containing analog copy protection signals while the signals are in the digital domain. The invent
5754649 Video media security and tracking system May 19, 1998
A video disc designed for providing security and tracking data in the rental video media market. Those new formats for video players and media allow for inclusion of security features which both allow tracking of rental of such media and prevent unauthorized rental thereof Each player
5212723 Burst phase correction system for video descrambling May 18, 1993
A method and apparatus for synchronizing a randomized video signal to a phase-locked sampling system. The phase-locked system is part of a scrambling apparatus capable of scrambling and subsequent descrambling of video signals recorded on videotape recorders which undesirably introduce

 
 
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