| 7043019 |
Copy protection for digital motion picture image data |
| May-9-2006 |
An apparatus and method for displaying a copy-deterrent pattern (104) within a digital motion picture in order to discourage recording of the motion picture using a video camera or other sampling recording... |
| 6980653 |
Signal reproducing/recording/transmitting method and apparatus and signal record medium |
| Dec-27-2005 |
A system for providing a copy permission indicator in a video signal. The copy permission indicator is generated on the basis of copy management information that has been appended to the video signal and... |
| 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... |
| 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... |
| 6731757 |
Multichannel digital signal generation method and apparatus |
| May-4-2004 |
A method of and apparatus for digitally generating a broadband signal comprising a plurality of CW or quadrature modulated signals having incrementally related frequencies wherein said plurality of signals... |
| 6711261 |
Enhancing concealment in the presence of fine mistuning for various TV scrambling techniques |
| Mar-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... |
| 6633982 |
Method and process for managing ultra secure electronic distribution of digital movies to commercial exhibitors |
| Oct-14-2003 |
A method and system for managing electronic distribution of digital movies to commercial exhibitors at warp speed is made ultra secure by utilizing synchronized and concurrent digitally bifurcated data... |
| 6618484 |
Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels |
| Sep-9-2003 |
Electronic steganographic techniques can be used to encode a rights management control signal onto an information signal carried over an insecure communications channel. Steganographic techniques ensure... |
| 6594361 |
High speed signal processing smart card |
| Jul-15-2003 |
An access control system for signal processing applications includes an integrated circuit (IC) card, or "smart" card, that provides both security control and data descrambling functions. A security control... |
| 6529600 |
Method and device for preventing piracy of video material from theater screens |
| Mar-4-2003 |
A method and device for preventing video tape piracy of video material shown by an electronic projector by varying frequently the frame rate, line rate or pixel rate of the projector. In a preferred embodiment... |
| 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... |
| 6477253 |
Method and apparatus for television signal scrambling using vertical sync replacement |
| Nov-5-2002 |
A method and device for scrambling video signals for broadcast in a proprietary television system includes modifying the vertical or horizontal synchronization pulses of the video signal to prevent unauthorized... |
| 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... |
| 6449367 |
Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels |
| Sep-10-2002 |
Electronic steganographic techniques can be used to encode a rights management control signal onto an information signal carried over an insecure communications channel. Steganographic techniques ensure... |
| 6424716 |
Method and apparatus for improved horizontal and vertical overlay signals for greater concealment in modern TV sets |
| Jul-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... |
| 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... |
| 6295360 |
Method and apparatus to defeat composite video signal protection |
| Sep-25-2001 |
A VGA (or other component video signal) output, e.g. from a computer or DVD player, is subject to protection so it is viewable on a VGA monitor. If the component video signal is converted to composite... |
| 6292567 |
Sync suppression television security system with addressable sync restoration |
| Sep-18-2001 |
A television transmission security system, including scrambling a television signal by suppressing at least one of the horizontal sync pulse and vertical blanking interval of the television signal; transmitting... |
| 6240185 |
Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels |
| May-29-2001 |
Electronic steganographic techniques can be used to encode a rights management control signal onto an information signal carried over an insecure communications channel. Steganographic techniques ensure... |
| 6208737 |
Method and apparatus for television signal scrambling using the replacement of synchronizing and color subcarrier signals with an alternative time base inherent in a QPSK audio subcarrier |
| Mar-27-2001 |
A novel method and apparatus for scrambling a television signal includes using a synchronization separator to separate a synchronization signal from an input audio-visual signal. The synchronization signal... |
| 6192074 |
Fixed frequency source timing processor method and apparatus |
| Feb-20-2001 |
The decoder method and apparatus receives an information stream comprising timing information and respective payload information. A substantially fixed frequency source is used to generate local timing... |
| 6175630 |
Method and apparatus for level and phase control of a plurality of RF signals |
| Jan-16-2001 |
A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective... |
| 6148320 |
Multichannel digital signal generation method and apparatus |
| Nov-14-2000 |
A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective... |
| 6064989 |
Synchronization of cryptographic keys between two modules of a distributed system |
| May-16-2000 |
The apparatus comprises: a first module including a universal key; a second module including a unique identifier and a unique key wherein the unique key is derived from the unique identifier and the universal... |
| 6058191 |
Method and apparatus for modifying the envelope of a RF carrier signal to remove copy protection signals therefrom |
| 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... |
| 6055315 |
Distributed scrambling method and system |
| Apr-25-2000 |
A scrambling system for a cable television system in which a group of channel frequencies are reused over a plurality of service areas includes an access controller, an encoder and a plurality of simplified... |
| 6037969 |
Method and apparatus for blocking out improper television programs |
| Mar-14-2000 |
A received television program is blocked out when a rating of the program is not within a scope of a preset rating. A rating signal is extracted from a video signal of the television program, and the rating... |
| 6028941 |
Method for the defeat of illegal descramblers sensitive to the edges of sync in scrambled video |
| Feb-22-2000 |
A method for defeating illegal receivers sensitive to the edges of synchronization signals in a scrambled video signal is provided. The scrambled video signal includes synchronization signals having levels... |
| 6009172 |
Method and apparatus for optimizing scrambling concealment of a video signal by modifying a specialized sync pulse |
| Dec-28-1999 |
A technique for improving the scrambling concealment of a video signal and the like when displayed on a television set or monitor, includes the pulse width and/or pulse position modulation of a horizontal... |
| 5864621 |
Broadband television scrambling and descrambling system |
| Jan-26-1999 |
A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective... |
| 5844988 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Dec-1-1998 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 5841863 |
Method and apparatus for scrambling and descrambling of video signals with edge fill |
| Nov-24-1998 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 5608799 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Mar-4-1997 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 5606612 |
Method and apparatus for television signal scrambling using a line expansion technique |
| Feb-25-1997 |
A method and apparatus for scrambling an original analog video signal samples predetermined portions of the original video signal at a first rate and stores the sampled portions of the original video signal... |
| 5553141 |
Encryption and decryption (scrambling and unscrambling) of video signals |
| Sep-3-1996 |
A video signal is encrypted by pseudo-random variation of portions of lines thereof to be horizontally scanned that are devoid of video information. Thus, the durations of line blanking intervals may be... |
| 5438620 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Aug-1-1995 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 5410601 |
Video scramble system and equipment |
| Apr-25-1995 |
The object of the present invention is to provide various scramble systems and equipments for embodying the scramble systems for omitting unqualified viewers in a pay TV system such as CATV. One of the... |
| 5206907 |
Television signal scrambling method and apparatus |
| Apr-27-1993 |
A video signal from a video-audio source is converted to a digital signal, and stored in a memory. A read clock or a write clock for the memory is temporarily suspended to elongate or shorten a corresponding... |
| 5177787 |
Scrambler with self-calibration |
| Jan-5-1993 |
The invention is directed to an improved scrambler capable of self-calibrating output signals. In one embodiment, the scrambler provides an encoded signal along separate signal pulses. A portion of one... |
| 5161188 |
Scrambling video by horizontal and vertical time shifting |
| Nov-3-1992 |
A system for scrambling and descrambling the image associated with a video signal employs the shifting in time of a video image after removal of vertical and horizontal synchronization, and color burst... |
| 5133009 |
Method and apparatus for defeating the operation of an IC built-in noise inverter |
| Jul-21-1992 |
Apparatus for defeating a noise inverter disposed within the IC includes circuitry for changing the amplitude of the AGC signal applied to an AGC amplifier prior to the noise inverter so as to lower the... |
| 5058157 |
Method and apparatus for encrypting and decrypting time domain signals |
| Oct-15-1991 |
A technique for encrypting and decrypting information signals normally arranged as a succession of lines of active information, with each line having a line timing reference, such as color video information... |
| 5029340 |
CATV terminal unit having an improved descrambling operation |
| Jul-2-1991 |
A CATV terminal unit descrambling operation is disclosed wherein unrecovered video pulse portions, existing because a scrambling compression period is longer than a descrambling expansion period, are eliminated.... |
| 5008934 |
CATV transmission system using scrambled signals |
| Apr-16-1991 |
A CATV system includes a main head end as a system center and a plurality of subhead ends. A baseband TV signal is transmitted from the main head end to the subhead ends through optical fiber cables. A... |
| 5003592 |
Scrambling video by time shifting |
| Mar-26-1991 |
A system for scrambling and descrambling the image associated with a video signal employs the shifting in time of a video image after removal of synchronization and color burst reference signals. Coded... |
| 4928309 |
Method and apparatus for descrambling a television signal |
| May-22-1990 |
A baseband television signal having a video portion with a suppressed horizontal sync pulse is descrambled by using a variable attenuator. The attenuator shifts the level of predetermined portions of the... |
| 4901349 |
Time dispersal encryption of TV signals |
| Feb-13-1990 |
In encrypting a video signal for communications security, the horizontal synchronization pulses are removed, the active signal portions of each line in a field are delayed according to psuedorandom sequence... |
| 4827511 |
Automatic gain control circuit for controlling gain of video signal in television receiver |
| May-2-1989 |
An intermediate-frequency automatic gain control circuit generates an IFAGC voltage for controlling the gain of an IF amplifier, in accordance with the level of the output signal of the IF amplifier. An... |
| 4823387 |
Television tuning system with provisions for tuning RF signals with scrambled video information |
| Apr-18-1989 |
A tuning system for tuning non-standard frequency RF signals which utilizes searches for non-standard RF signals by examining both a synchronization component and an AFT signal at each of a successive... |
| 4790011 |
Auto clamp for modulator for suppressed sync signals |
| Dec-6-1988 |
Suppressed sync pulses in a scrambled video signal are restored to their proper level in another video signal that is applied to a clamp circuit for controlling the DC level of an amplifier coupled between... |
