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7580526 |
Methods and apparatus for protecting signals transmitted between a source and destination device over multiple signals lines
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...
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7545937 |
Chrominance processing arrangement having immunity to colorstripe encoding
A video system ( 100 ) includes a chrominance processing arrangement ( 200 ). The chrominance processing arrangement ( 200 ) includes a burst accumulator ( 240 ) operative to detect a polarity...
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7447315 |
System for determining successful reception of a message
A method for determining that all of a scrambled message has been successfully received, the scrambled message being scrambled in accordance with a scrambling key and being capable of being...
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7400727 |
Information embedding method, information extracting method, information embedding apparatus, information extracting apparatus, and recording media
An apparatus for embedding secret information in an image signal transmitted with a shape signal showing the shape of an object is described. This apparatus comprises an embedding position decision...
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7398540 |
System and method for tuning channels using a central point of control
Systems and methods for tuning channels within a home entertain system by connecting multiple consumer electronics devices to a central electronics device with an internal tuner. The consumer...
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7362861 |
Methods and apparatus for protecting information content
Methods and apparatus for protecting copyrighted information, e.g., video signals, from unauthorized copying. Analog red (R), green (G) and blue (B) video signals are transmitted from a source...
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7319755 |
Image altering apparatus and method for providing confidential viewing of a fundamental display image
An image altering apparatus which provides confidential viewing of a video display by means of time multiplexing the fundamental display image with a color-inverted image thereof on a...
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7286668 |
Method of protecting copyright of digital video work
This invention discloses a method of protecting copyright of a digital video work by using a digital password technology and a digital watermark technology to prevent the unauthorized use of a...
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7224798 |
Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system
The present invention is directed towards providing a partial dual-encrypted stream in a conditional access overlay system. The headend equipment includes an aligner, identifier, and remapper (AIR)...
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7221761 |
Error resilient digital video scrambling
A method and an apparatus for error resilient, digital image scrambling are disclosed. Error resilience scrambling is produced by shuffling transform coefficients between arrays of coefficients...
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7136485 |
Packetizing devices for scalable data streaming
A device and method thereof for packetizing scalably encoded data. The device can include a receiver adapted to receive a stream of data from an encoding device, wherein at least a first portion of...
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7046818 |
Standards compliant watermarking for access management
Visible watermarking techniques for digital images and video operate on decoded transform coefficients and maintain the watermarked data in the same compressed format as the original so that the...
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7018045 |
Image display apparatus and image display method
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...
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6996236 |
Methods and apparatus for protecting signals transmitted between a source and destination device over multiple signal lines
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...
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6925181 |
Method of protecting high definition video signal
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...
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6888943 |
Multimedia adaptive scrambling system (MASS)
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...
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6826281 |
Storage-encryption-retrieval device and method with resulting business processes
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...
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6459795 |
Method and apparatus for enhancing the scrambling of a TV signal via erroneous clamp signals
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...
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6349139 |
Method and apparatus for minimizing chroma subcarrier instability caused by a video line scrambling system
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...
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6222978 |
Video signal copy guard apparatus and method
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...
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6212325 |
Method and apparatus for processing video signal and storage medium
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...
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6091822 |
Method and apparatus for recording scrambled video audio signals and playing back said video signal, descrambled, within a secure environment
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...
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6021196 |
Reference palette embedding
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...
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6018608 |
Method of generating information used for the copy protecting signal and apparatus using the same
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...
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5930360 |
Method of scrambling three-dimensional image
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...
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5883959 |
Video copy protection
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...
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5784523 |
Method and apparatus for defeating effects of color burst modifications to a video signal
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...
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5764764 |
Video signal format converting circuit
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...
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5651065 |
Insertion of supplemental burst into video signals to thwart piracy and/or carry data
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...
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5590194 |
Method of and apparatus for scrambling a video signal with full network transmission and recording capability
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...
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5555305 |
Method and apparatus for secure transmission of video signals
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...
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5504815 |
Method and apparatus for scrambling and descrambling
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...
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5212723 |
Burst phase correction system for video descrambling
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...
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5161188 |
Scrambling video by horizontal and vertical time shifting
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...
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5146496 |
Method and apparatus for enhancing the security of a scrambled television signal
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...
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5003592 |
Scrambling video by time shifting
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....
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4953208 |
CATV system transmitting a scrambled television signal
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...
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4901349 |
Time dispersal encryption of TV signals
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...
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4757531 |
Encryption of television signals
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...
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4691353 |
Scrambling systems for CATV
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...
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4663659 |
Video signal scrambling system employing full line reversal and double burst coding
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...
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4626890 |
Method and apparatus for removing phase modulation from the color burst
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...
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4577216 |
Method and apparatus for modifying the color burst to prohibit videotape recording
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...
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4488183 |
Copy-proof recording medium and device for adding copy-proof interference signal
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...
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4338628 |
Scrambled video communication system
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...
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3679813 |
CATV TV OR SUBSCRIPTION TELEVISION OPERATIONS
This application discloses a system of pay or subscription television under which distantly emitted pay or subscription television programs may be received at a local Community Antenna Television...
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3612752 |
SUBSCRIPTION TELEVISION SYSTEM WHICH RECEIVES EITHER FREE BROADCAST SIGNALS OR PAY WIRED SIGNALS
This case discloses wired forms of transmission of the television RF signals, and the audio signals of the program, under control of a control station. with provision for receiving the program...
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3435130 |
TELEVISION SYSTEMS AND OPERATIONS
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3365542 |
Subscription or pay television, and the like
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3330906 |
Radio and television operation
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