| 7018045 |
Image display apparatus and image display method |
| Mar-28-2006 |
An image display apparatus and method is disclosed that can prevent shot-sneaking of an image displayed by a projector apparatus. The projector apparatus embeds a display image portion in which the same... |
| 6996236 |
Methods and apparatus for protecting signals transmitted between a source and destination device over multiple signal lines |
| Feb-7-2006 |
Methods and apparatus for protecting copyrighted information, e.g., video signals, from unauthorized use are described. Encrypted video signals are transmitted from a source device, e.g., display adapter,... |
| 6983050 |
Methods and apparatus for protecting information content |
| Jan-3-2006 |
Methods and apparatus for protecting copyrighted information, e.g., video signals, from unauthorized coping. Analog red (R), green (G) and blue (B) video signals are transmitted from a source device, e.g.,... |
| 6925181 |
Method of protecting high definition video signal |
| Aug-2-2005 |
A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to... |
| 6888943 |
Multimedia adaptive scrambling system (MASS) |
| May-3-2005 |
A system (300, 500) for scrambling digital samples (115, 200, 250, 260, 270) of multimedia data, including audio and video data samples, such that the content of the samples is degraded but still recognizable,... |
| 6826281 |
Storage-encryption-retrieval device and method with resulting business processes |
| Nov-30-2004 |
An encryption device includes a card with a grid comprising multiple rows and columns defining boxes for receiving individual characters. One of the columns or rows contains a master password or code character... |
| 6570990 |
Method of protecting high definition video signal |
| May-27-2003 |
A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to... |
| 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... |
| 6349139 |
Method and apparatus for minimizing chroma subcarrier instability caused by a video line scrambling system |
| Feb-19-2002 |
In certain video scrambling systems, composite video is imperfectly separated into luminance and chrominance and scrambled in such a way that an unstable residual chroma color subcarrier remains in the... |
| 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... |
| 6212325 |
Method and apparatus for processing video signal and storage medium |
| Apr-3-2001 |
A video signal processing apparatus, a video signal processing method and a recording medium are provided for reliably preventing illegal copy through a VTR and supplying a high-quality video signal with... |
| 6091822 |
Method and apparatus for recording scrambled video audio signals and playing back said video signal, descrambled, within a secure environment |
| Jul-18-2000 |
A technique is disclosed for preventing unauthorized playback of scrambled video/audio signals recorded on, for example, a video tape cassette, which technique includes several cooperating processes and... |
| 6021196 |
Reference palette embedding |
| Feb-1-2000 |
A method of embedding auxiliary information into the digital representation of publication quality color-component digital data. The method applies to all digital data for which individual values are represented... |
| 6018608 |
Method of generating information used for the copy protecting signal and apparatus using the same |
| Jan-25-2000 |
A component of color difference signal is detected from a video component signal, and its color saturation information is compared with a predetermined threshold level, then in response to the comparison... |
| 5930360 |
Method of scrambling three-dimensional image |
| Jul-27-1999 |
In a method of scrambling a three-dimensional image according to the present invention, the phase of a part of at least one of a left eye image and a right eye image constituting a three-dimensional image... |
| 5883959 |
Video copy protection |
| Mar-16-1999 |
Regular burst signals from video line (n+0) to line (n+3) are replaced by modified burst signals which function as copy prohibit signals. The phase of the modified burst signals is controlled by controlling... |
| 5784523 |
Method and apparatus for defeating effects of color burst modifications to a video signal |
| Jul-21-1998 |
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... |
| 5764764 |
Video signal format converting circuit |
| Jun-9-1998 |
A video signal format converting circuit is disclosed, comprising a signal converting matrix circuit and a filter circuit that is constructed of a time delaying device for a video signal corresponding... |
| 5761304 |
Video signal format converting circuit |
| Jun-2-1998 |
A video signal format converting circuit is disclosed, comprising a signal converting matrix circuit and a filter circuit that is constructed of a time delaying device for a video signal corresponding... |
| 5657387 |
Video signal format converting circuit |
| Aug-12-1997 |
A video signal format converting circuit is disclosed, comprising a signal converting matrix circuit and a filter circuit that is constructed of a time delaying device for a video signal corresponding... |
| 5651065 |
Insertion of supplemental burst into video signals to thwart piracy and/or carry data |
| Jul-22-1997 |
A video signal is modified to include a supplemental burst signal on at least some of the scan lines for each frame. The supplemental burst signals are used to prevent a pirate decoder from descrambling... |
| 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,... |
| 5590194 |
Method of and apparatus for scrambling a video signal with full network transmission and recording capability |
| Dec-31-1996 |
A video scrambling and descrambling system that produces color video that is difficult or annoying to watch by randomly switching the color components of a component or composite video. In the scrambling... |
| 5581613 |
Color image processing apparatus and method |
| Dec-3-1996 |
An image processing system has an external image processing apparatus and an image input/output apparatus. One of the apparatuses acts as a transmission-side apparatus and the other apparatus acts as a... |
| 5555305 |
Method and apparatus for secure transmission of video signals |
| Sep-10-1996 |
Video signals are sampled at 4Fsc locked onto sub-carrier phase and frequency. The active picture lines of each field are divided into 6 blocks of 47 lines and the active line periods of those lines scrambled... |
| 5504815 |
Method and apparatus for scrambling and descrambling |
| Apr-2-1996 |
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,... |
| 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... |
| 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... |
| 5146496 |
Method and apparatus for enhancing the security of a scrambled television signal |
| Sep-8-1992 |
The scrambling security of a sync suppressed television signal is enhanced by eliminating the fixed time relationship between the normal color burst component and synchronization information in successive... |
| 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... |
| 4953208 |
CATV system transmitting a scrambled television signal |
| Aug-28-1990 |
A method of scrambling a television signal is provided in which, during a horizontal blanking interval and during a vertical blanking interval, a video signal is compressed and a key signal containing... |
| 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... |
| 4757531 |
Encryption of television signals |
| Jul-12-1988 |
A method of encrypting a television signal having in each ruster scan line a digital section of information and chrominance and luminance sections of information comprising cutting either or both of the... |
| 4691353 |
Scrambling systems for CATV |
| Sep-1-1987 |
In a TV signal scrambling system for use in a CATV network wherein premium programs are transmitted over cable, by broadcast transmission and the like with the sync pulses of the color TV signals suppressed,... |
| 4682360 |
Video transmission system |
| Jul-21-1987 |
A subscriber cable television system uses predominantly digital signal processing techniques and has extremely high security and an increased capacity for transmitting program and customer data to individual... |
| 4663659 |
Video signal scrambling system employing full line reversal and double burst coding |
| May-5-1987 |
A memory reverses the sequence of samples of selected lines of a composite video input signal without separating the color burst and chrominance components of the lines thereby preserving chroma-burst... |
| 4626890 |
Method and apparatus for removing phase modulation from the color burst |
| Dec-2-1986 |
A video signal of the type having phase modulation induced in the color burst component thereof to inhibit video tape recording, is modified to remove the phase modulation and permit acceptable video tape... |
| 4577216 |
Method and apparatus for modifying the color burst to prohibit videotape recording |
| Mar-18-1986 |
A method and apparatus which modifies a color video signal in such a manner that a conventional television receiver produces a normal color picture from the modified signal, whereas a videotape recording... |
| 4488183 |
Copy-proof recording medium and device for adding copy-proof interference signal |
| Dec-11-1984 |
A copy-proof interference signal or signals is/are added to the composite color video signal to be recorded on a recording medium in the vicinity of the horizontal synchronous signal. The interference... |
| 4353088 |
Coding and decoding system for video and audio signals |
| Oct-5-1982 |
A coding and decoding system for video signals includes means at the transmitter for applying sine wave amplitude modulation of approximate line frequency to the aural carrier to prevent the chrominance... |
| 4338628 |
Scrambled video communication system |
| Jul-6-1982 |
A television communication system wherein a composite video signal, is scrambled to prevent a stabilized picture from being displayed by a typical broadcast televison set receiving the scrambled video... |
