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| Number | Title | Issue Date |
| 7447313 | Pointers to encrypted data in RTP header In a system that transmits frames of data as a stream of packets, packet header information is augmented with localizing data that serves to distinguish frame header information and frame data of each frame within the stream of packets. The localizing data facilitat... | 11/04/2008 |
| 7391866 | Broadcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list A reception apparatus includes: a reception unit for receiving the scrambled content, the scrambled content being scrambled so that a predetermined unit of scrambled content is descrambled using a descrambling key corresponding to the predetermined unit of scrambled... | 06/24/2008 |
| 7386130 | Encryption secured against DPA The encryption device includes a random number generator for generating a random number; and a first selector for selecting one of q fixed values in response to the random number, a second selector for selecting one set of q sets of fixed S-box tables in response to... | 06/10/2008 |
| 7366908 | Digital watermarking with content dependent keys and autocorrelation properties for synchronization A digital watermark detection method exploits autocorrelation properties of the watermarked signal that enable synchronization of the digital watermark despite temporal or geometric distortion of the host signal. Other watermark methods employ keys, including a key ... | 04/29/2008 |
| 7315685 | Method and apparatus for continuous feed of disks for recording digital video signals and authenticating the digitally recorded disks A digital signal recording apparatus a method of operating the same, used in conjunction with TV and video cameras, for example for security applications, includes a disk feeder system having a disk recorder and an upper compartment for holding fresh unrecorded disk... | 01/01/2008 |
| 7305087 | Digital home network and method for creating and updating such a network The local digital network comprises: access devices, for receiving data originating from outside the network and transmitting them at a point of the network; and presentation devices for receiving the data flowing in the network and presenting them at a point of the... | 12/04/2007 |
| 7260829 | Terminal with multiple audio and video A novel advanced set top terminal capable of digital decompression, displaying picture-on-picture, outputting multiple video channels, outputting multiple audio signals, outputting multiple audio channels corresponding to a single video channel, and other advanced f... | 08/21/2007 |
| 7224819 | Integrating digital watermarks in multimedia content A method for tracking media signals in multimedia content is provided by uniquely identifying the multimedia content with a digital watermark identifier. A video channel is preferably embedded with a first watermark identifier. The first identifier uniquely identifi... | 05/29/2007 |
| 7140040 | Protecting wireless local area networks from intrusion by eavesdropping on the eavesdroppers and dynamically reconfiguring encryption upon detection of intrusion Apparatus for eavesdropping within an area layer adjacent to and surrounding a LAN area periphery for potential wireless transmissions of an intruder having a lower frequency within a level below the LAN frequency; and an implementation responsive to said eavesdropp... | 11/21/2006 |
| 7086087 | Information processing device, card device and information processing system It is a technological object of the present invention to provide an information processing device, a card and a card system that have a high level of security. In order to achieve the object described above, the present invention provides a data processing apparatus... | 08/01/2006 |
| 7076238 | Wireless communication system exchanging encrypted data A wireless communication system includes a terminal device that transmits a wireless signal and an electronic device that receives the wireless signal transmitted by the terminal device. The terminal device is provided with an encrypting system that encrypts data to... | 07/11/2006 |
| 6980650 | System for providing keys A method for providing keys for descrambling scrambled content, the scrambled content being divided into frames, the method including: identifying a plurality of frames to be descrambled; for each frame of the plurality of frames, identifying a key period associated... | 12/27/2005 |
| 6968058 | Digital evidential camera system for generating alteration detection data using built-in encryption key A digital evidential camera system is for detecting the alteration of image data obtained by photographing an object. The system comprises the camera and an alteration detection unit. The camera includes an image pickup unit for picking up an image of the object and... | 11/22/2005 |
| 6925342 | System and method for protecting digital media A system and method for verifying digital recordings that have a plurality of tracks. The system includes an encoder that: divides the digital recording into a plurality of sections and associates a random number with each section; calculates an identifier as a func... | 08/02/2005 |
| 6901516 | System and method for ciphering data A system for ciphering data for transmission by a communication device is provided. The system includes a memory device having a memory buffer a first access port connected to the memory buffer and a second access port connected to the memory buffer. The system also... | 05/31/2005 |
| 6529209 | Method for providing privately viewable data in a publically viewable display 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 among frames of masking data according to the sequ... | 03/04/2003 |
| 6425082 | Watermark applied to one-dimensional data In the process of embedding watermark information in one-dimensional source data, first spread one-dimensional data x(t) is generated by subjecting one-dimensional source data s(t) to spectrum-spreading operation using a PN sequence g(t). This first sprea... | 07/23/2002 |
| 6330333 | Cryptographic system for wireless communications A wireless communications system (110) with increased privacy. The system (110) transmits an encrypted signal between a base station (112) and a wireless terminal (122). In the forward channel, the base station (112) includes an encryptor (130) with a lon... | 12/11/2001 |
| 6272634 | Digital watermarking to resolve multiple claims of ownership A method and apparatus for digital watermarking to resolve multiple claims of ownership is disclosed. According to one embodiment of the invention, a first watermark requiring the host data for detection is embedded into the host data. A second watermark ... | 08/07/2001 |
| 6061793 | Method and apparatus for embedding data, including watermarks, in human perceptible sounds A technique for hiding of data, including watermarks, in human-perceptible sounds, that is, audio host data, is disclosed. In one embodiment a method comprises three steps. In the first step, data to be embedded is inputted. In the case of a watermark, th... | 05/09/2000 |
| 5396642 | Variable frequency CATV jamming method and apparatus A frequency generating means, generates an initial frequency of greater amplitude than the amplitude of a television signal carrier wave. The generated frequency is compared to a reference frequency which would be suitable for jamming one of the channels ... | 03/07/1995 |
| 5367269 | System for producing an oscillating jamming signal utilizing a phase-locked loop A system for producing an oscillating signal includes a phase-locked loop including a control voltage producing circuit. The control voltage producing circuit is provided for producing a plurality of predetermined control voltages, with each of the predet... | 11/22/1994 |
| 5351292 | Method and apparatus for preventing external detection of signal information In a method and an apparatus for preventing external detection of the signal information in video signals occurring in, and being emitted from, video signal circuits in a display unit, or a similar unit, and including substantially consecutive frame or fi... | 09/27/1994 |
| 5321747 | Method and apparatus for preventing extraneous detection of signal information In a method of preventing extraneous detection of signal information from raster scan signals in a plurality of consecutive line signals intended to form an image or partial images there is generated a random signal sequence, correlated with the informati... | 06/14/1994 |
| 5287539 | Interdiction program denial system for jamming audio and video signals Off premises cable television interdiction apparatus comprises a microprocessor actuation and control means for actuating and controlling at least one frequency agile voltage controlled oscillator. The voltage controlled oscillator selectively jams only u... | 02/15/1994 |
| 5243647 | Method and apparatus for broadband signal distribution Apparatus for broadband signal distribution is equipped with a detector for detecting when the apparatus is open and is further adapted to receive an entry code generator. If the entry code generator is not installed or, if installed, fails to generate an... | 09/07/1993 |
| 5216713 | Method and apparatus for preventing extraneous detection of signal information In a extraneous of signal method of preventing detection of signal information from raster scan signals in a plurality of consecutive line signals intended to form an image or partial images there is generated a random signal sequence, correlated with the... | 06/01/1993 |
| 5157725 | Method and apparatus for preventing external detection of signal information In a method and an apparatus for preventing external detection of the signal information in video signals occurring in, and being emitted from, video signal circuits in a display unit (A, A'), or a similar unit, and comprising substantially consecutive fr... | 10/20/1992 |
| 5056138 | Television selection system A system connectable into standard television receiver systems for converting predetermined channels thereof to audio only channels and detecting selection of the predetermined channels to cause blanking of the picture tube at individual receivers in the ... | 10/08/1991 |
| 4991206 | Method and apparatus for jamming selected television programs In order to selectively jam M selected channels to selected subscribers in a CATV system, each of M different oscillating signals, each of which oscillating signals has a duration longer than the duration of the horizontal synchronization signal of the te... | 02/05/1991 |
| 4896354 | Image reception system An image reception system is disclosed, which includes a tuner for selecting one of broadcast channels of CATV, a video detector connected to the tuner for deriving output signals having video signals and command data of the selected channel, a data fetch... | 01/23/1990 |
| 4682359 | Television picture and sound scrambler and method Television signal scrambling is effected by combining moderate level trap-attenuation of the visual carrier frequency with an injected fm-modulated interfering signal to effect, by adjustment of amplitude and fm-modulation levels, satisfactory picture scr... | 07/21/1987 |
| 4599646 | Method and apparatus for identifying unauthorized or defective converter/decoder boxes in CATV system A head-end apparatus for a CATV system is provided for facilitating identification of unauthorized or defective converter/decoder boxes in the system. According to the invention, an IF audio signal, representing the aural portion of the program source to ... | 07/08/1986 |
| 4521809 | Method and apparatus for controlling access to selected television programs In order to control subscriber access to selected television programs in a CATV system, nonstandard horizontal synchronizing pulses, having a greater amplitude and either a higher or lower pulse repetition rate than the contained horizontal synchronizing ... | 06/04/1985 |
| 4317213 | Television reception interfering apparatus Apparatus for use with a television receiver for selectively inhibiting reception of television broadcast signals. The apparatus includes a number of signal generating circuits, each respectively set to generate an electrical signal substantially equal to... | 02/23/1982 |
| 4216500 | Encoding and decoding system The frequencies of a channel containing at least one modulated carrier are encoded by heterodyning them with an alternating current wave having a cyclically varying frequency, and decoding of the encoded channel is achieved by deriving a signal correspond... | 08/05/1980 |
| 4085422 | Fee-charging apparatus for television sets An apparatus with specified video carrier jamming for disturbing the image on a screen of a TV receiver for Fee-charged Viewing Thereof comprises an oscillating circuit, a switch means, a feeding device and a mixer circuit, and the said mixer circuit comb... | 04/18/1978 |
