| 6990584 |
Method of and apparatus for restricting copy of digital information, and apparatus for recording digital information |
| Jan-24-2006 |
An apparatus for restricting a copy of digital information is provided with a detecting device for detecting a first watermark, which is buried in the digital information and comprises a first signal generated... |
| 6959290 |
Method and apparatus for tracking states of digital works |
| Oct-25-2005 |
A method and system for controlling use of digital works in accordance with usage rights associated with the digital works. The method includes the steps of receiving a request to use a digital work, and... |
| 6957193 |
Repository with security class and method for use thereof |
| Oct-18-2005 |
A trusted system having at least one repository for controlling use of digital works in accordance with usage rights associated with the digital works. A request to use a digital work in accordance with... |
| 6954738 |
Method and apparatus for distributing enforceable property rights |
| Oct-11-2005 |
An enforceable property right and a system for controlling the manner of use of an item in accordance with usage rights. The enforceable property right includes an item ticket having a security mechanism... |
| 6944771 |
Method and apparatus for overcoming a watermark security system |
| Sep-13-2005 |
To overcome a watermark security system that is based on a limited set of possible watermark values, a collection of authentic watermarked material is created, and a substitution system provides material... |
| 6925448 |
Usage rights grammar and digital works having usage rights created with the grammar |
| Aug-2-2005 |
A digital work recorded on a computer readable media for use within a system having at least one repository for enforcing use of digital content in accordance with usage rights associated with the digital... |
| 6910022 |
Usage rights grammar and digital works having usage rights created with the grammar |
| Jun-21-2005 |
A system for associating usage rights with digital content. Usage rights are created from a grammar. The usage rights specify a manner of use indicating one or more stated purposes for which the digital... |
| 6865551 |
Removable content repositories |
| Mar-8-2005 |
A repository for storing digital works and controlling the use of digital works in accordance with usage rights associated with the digital works and including a manner of use for the digital work. The... |
| 6836549 |
Method and apparatus for synthesizing and reducing the effects of video copy protection signals |
| Dec-28-2004 |
A method and apparatus for defeating copy protection signals in a video signal, and also for providing copy protection signals for a video signal, is disclosed. The defeat technique generally utilizes... |
| 6819765 |
Video-signal output apparatus, video-signal input apparatus, and scramble method, and descramble method |
| Nov-16-2004 |
A system, which includes a video-signal output apparatus and a video-signal input apparatus, has a construction in which scrambling or descrambling is performed with a scramble key generated using copy-control... |
| 6748079 |
Method and system for recording data on and reading data from an optical medium |
| Jun-8-2004 |
Accordingly, an improved method for recording data on an optical medium is disclosed which includes receiving and encoding a first set of data frames by a CIRC encoder to generate a second set of data... |
| 6690880 |
Method and apparatus for copy protection detection in a video signal |
| Feb-10-2004 |
A method and apparatus for detecting copy protection included in an input video signal is described. Two types of copy protection are particularly addressed, including techniques that imbed copy protection... |
| 6587561 |
Key delivery in a secure broadcasting system |
| Jul-1-2003 |
A key delivery method for use in an encoded communications system in which at least one encoded item including a first item encoded with a first item control word is sent in a communication stream from... |
| 6564324 |
Reprogrammable subscriber terminal |
| May-13-2003 |
A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The... |
| 6535614 |
Method and apparatus for recording and reproducing electronic watermark information, and recording medium |
| Mar-18-2003 |
At recording of a video signal, with electronic watermark information being embedded therein, on a recording medium, a reference signal which is formed differently from the watermark information is inserted... |
| 6529209 |
Method for providing privately viewable data in a publically viewable display |
| Mar-4-2003 |
A method for providing privately viewable data in a publically viewable display comprises the steps of: generating a sequencing pattern; generating a data signal having interspersed frames of private data... |
| 6516132 |
Method and apparatus for improving the effects of color burst modifications to a video signal |
| Feb-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... |
| 6501842 |
Method and apparatus for modifying a video signal by back porch lowering |
| Dec-31-2002 |
Method and apparatus for modifying or reducing effects of signals added to a video signal to permit more unhampered copying and/or viewing thereof. In one version the method and apparatus replace or level... |
| 6459795 |
Method and apparatus for enhancing the scrambling of a TV signal via erroneous clamp signals |
| Oct-1-2002 |
An improved television scrambling signal is achieved by adding erroneous clamp pulses into a television signal after the signal may have been previously scrambled, for example, by prior art position modulated... |
| 6427047 |
Apparatus and method for protecting the unauthorized duplication of a signal |
| Jul-30-2002 |
An additional information produced by an additional information signal producing curcuit is spectrum-spread by a spectrum spreading code generated on the basis of the timing of the synchronous signal of... |
| 6421497 |
Method for locating copy protection pulses within selected video lines of a video signal |
| Jul-16-2002 |
In a known copy protection process for preventing recording of video signals, pseudo sync and AGC pulses are present on predetermined lines within the blanking intervals of the video signal so that any... |
| 6404889 |
Protection of a component video signal |
| Jun-11-2002 |
A VGA (or other component video signal) output, e.g. from a computer or DVD player, is protected so it is viewable on a VGA monitor. However, if the component video signal is converted to composite video... |
| 6345099 |
System and method for copy protecting computer graphics |
| Feb-5-2002 |
Copy protection is provided for the now-unprotected computer monitor port of a computer 100 in two ways: (i) delaying synchronizing signals by a time variable amount and (ii) generating pulses during non-active... |
| 6285765 |
Method and apparatus for reducing effects of copy protection of composite video signal |
| Sep-4-2001 |
Copy protection for composite video signals is well known. Copy protection, while it does not prohibit making a copy per se, does render any copy (recording) of the video signal relatively unviewable so... |
| 6282654 |
Information signal recording/reproducing system, information signal recording device, information signal reproducing device and information signal recording/reproducing process |
| Aug-28-2001 |
When digital image signals fed in through an input terminal to be recorded on a disc, medium-related information, such as a serial number in a table of contents of the disc, is spectrum-spread in a spectrum... |
| 6268889 |
Video signal processing apparatus and signal transmitting method |
| Jul-31-2001 |
RGB signals and sync signals H and V are inputted from a personal computer or the like. Additional information is superimposed to a vertical blanking period of the R signal. A timing generating unit generates... |
| 6256390 |
Device having a digital interface and a network system using such a device and a copy protection method |
| Jul-3-2001 |
A copy flag detecting circuit in a device detects the copy generation management information. This copy generation management information is inserted in the CIP header of the IEEE 1394 packet for transmission.... |
| 6222978 |
Video signal copy guard apparatus and method |
| Apr-24-2001 |
A video signal copy guard system in which a special color burst signal (or "copy prohibition signal") is inserted into the video signal to be copy protected so that the protected signal includes both a... |
| 6188832 |
Method and apparatus for modifications made to a video signal to inhibit the making of acceptable videotape recordings |
| Feb-13-2001 |
A video signal is modified so that a television/receiver still produces a normal picture from the modified signal, whereas videotape recording of this signal produces generally unacceptable pictures. Videotape... |
| 6173109 |
Method and apparatus for removing or defeating effects of copy protection signals from a video signal |
| Jan-9-2001 |
In a known copy protection process for preventing recording of video signals, pseudo sync and AGC pulses are present on predetermined lines within the blanking intervals of the video signal so that any... |
| 6169584 |
Automatic modulation control of sync suppressed television signals |
| Jan-2-2001 |
The depth of modulation and the absolute RF carrier level of an amplitude-modulated video signal are automatically adjusted. For adjustment of the depth of modulation, a sync tip of the video signal is... |
| 6118871 |
Device having a digital interface and a network system using such a device and a copy protection method |
| Sep-12-2000 |
A copy flag detecting circuit in a device detects the copy generation management information. This copy generation management information is inserted in the CIP header of the IEEE 1394 packet for transmission.... |
| 6005839 |
Data transmitting method, data recording apparatus, data record medium and data reproducing apparatus |
| Dec-21-1999 |
A data transmitting method for preventing direct copying of digital bi-level signals. When processing input digital data from an input terminal 11 by circuits 13 to 16, modulating the data by a modulation... |
| 6002830 |
Method and apparatus for removing or defeating effects of copy protection signals from a video signal |
| Dec-14-1999 |
In a known copy protection process for preventing recording of video signals, pseudo sync and AGC pulses are present on predetermined lines within the blanking intervals of the video signal so that any... |
| 5991500 |
Copy control for a video signal with copyright signals superimposed as predetermined bits in the VBID data of the video signal |
| Nov-23-1999 |
A video signal is processed to selectively permit copying by superposing in that portion of the video signal which does not contain useful picture information a copyright information signal indicative... |
| 5978480 |
System for scrambling and descrambling video signals by altering synchronization patterns |
| Nov-2-1999 |
A system for scrambling and descrambling a composite video signal having content and an associated composite synchronization signal. The system comprises an apparatus for scrambling the composite video... |
| 5757910 |
Apparatus for preventing illegal copying of a digital broadcasting signal |
| May-26-1998 |
An apparatus for preventing illegal copying of a digital broadcasting signal, comprises a transmission section for generating a copy prevention signal to determine a display time of each field of a digital... |
| 5748733 |
Method and apparatus to reduce effects of certain copy protection purses within a video signal |
| May-5-1998 |
Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on an illegal copy. The enhancements in one version introduce into the overscan portion of... |
| 5737417 |
Videotape anti-copying encryption scheme |
| Apr-7-1998 |
Anti-copying protection for video material is provided wherein at least one high-amplitude pulse is inserted into various lines of the video signal, in and immediately preceding the vertical interval associated... |
| 5680454 |
Method and system for anti-piracy using frame rate dithering |
| Oct-21-1997 |
A method and system of displaying an image sequence containing a plurality of image frames to inhibit an unauthorized duplication thereof by a camera. The method includes steps of generating a pseudo-random... |
| 5673356 |
Method and an apparatus for preventing unauthorized recording on tapes on video programs |
| Sep-30-1997 |
A method and apparatus are provided for preventing unauthorized recording of video programs on tape, in which the frame repetition frequency of the signals to be transmitted is changed in such a manner... |
| 5661801 |
Method and apparatus for stabilizing and brightening prerecorded TV signals encoded with copy protection |
| Aug-26-1997 |
A method and apparatus are provided for preventing the existence of pseudo-sync pulses and added AGC pulses in an original video tape with copy protection from producing a poor t.v. picture when simply... |
| 5636278 |
Player for picture concealment and concealment release |
| Jun-3-1997 |
A player for concealing a picture or releasing picture concealment using a secret code provided by a user while recording and/or reproducing of a video signal with respect to a recording medium includes... |
| 5633927 |
Video copy protection process enhancement to introduce horizontal and vertical picture distortions |
| May-27-1997 |
Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on an illegal copy. The enhancements in one version introduce into the overscan portion of... |
| 5625691 |
Method and apparatus to defeat certain copy protection pulses within a video signal |
| Apr-29-1997 |
Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on an illegal copy. The enhancements in one version introduce into the overscan portion of... |
| 5583936 |
Video copy protection process enhancement to introduce horizontal and vertical picture distortions |
| Dec-10-1996 |
Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on an illegal copy. The enhancements in one version introduce into the overscan portion of... |
| 5481608 |
Method and an apparatus for preventing unauthorized copying of video signals on tape |
| Jan-2-1996 |
A method and an apparatus for modifying video signals in such a manner that, when recording said signals with a tape recording apparatus, the control of this apparatus is disturbed, which signals comprise... |
| 5402488 |
Method and apparatus for modifying a video signal |
| Mar-28-1995 |
A standard video signal is processed by including an interval of an insertion signal whose potential varies continuously between the video sync tip level and a level substantially above blanking level... |
| 5394470 |
Horizontal pulse augmentation of a video signal |
| Feb-28-1995 |
Augmenting pulses are added to the horizontal sync pulse intervals of a video signal to prevent a copy of the thus modified video signal from being satisfactorily displayed. The magnitude of the augmenting... |
| 5337157 |
Copy guard processing detecting apparatus |
| Aug-9-1994 |
A copy guard processing detecting apparatus which can correctly judge whether or not a copy guard is applied to an input video signal and prevents copy guard processing from being applied to a video signal... |
