| 6980650 |
System for providing keys |
| Dec-27-2005 |
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... |
| 6968058 |
Digital evidential camera system for generating alteration detection data using built-in encryption key |
| Nov-22-2005 |
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... |
| 6925342 |
System and method for protecting digital media |
| Aug-2-2005 |
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... |
| 6901516 |
System and method for ciphering data |
| May-31-2005 |
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... |
| 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... |
| 6425082 |
Watermark applied to one-dimensional data |
| Jul-23-2002 |
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... |
| 6330333 |
Cryptographic system for wireless communications |
| Dec-11-2001 |
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... |
| 6272634 |
Digital watermarking to resolve multiple claims of ownership |
| Aug-7-2001 |
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... |
| 6061793 |
Method and apparatus for embedding data, including watermarks, in human perceptible sounds |
| May-9-2000 |
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... |
| 5396642 |
Variable frequency CATV jamming method and apparatus |
| Mar-7-1995 |
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... |
| 5367269 |
System for producing an oscillating jamming signal utilizing a phase-locked loop |
| Nov-22-1994 |
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... |
| 5351292 |
Method and apparatus for preventing external detection of signal information |
| Sep-27-1994 |
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,... |
| 5321747 |
Method and apparatus for preventing extraneous detection of signal information |
| Jun-14-1994 |
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... |
| 5287539 |
Interdiction program denial system for jamming audio and video signals |
| Feb-15-1994 |
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... |
| 5243647 |
Method and apparatus for broadband signal distribution |
| Sep-7-1993 |
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... |
| 5216713 |
Method and apparatus for preventing extraneous detection of signal information |
| Jun-1-1993 |
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... |
| 5157725 |
Method and apparatus for preventing external detection of signal information |
| Oct-20-1992 |
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... |
| 5056138 |
Television selection system |
| Oct-8-1991 |
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... |
| 4991206 |
Method and apparatus for jamming selected television programs |
| Feb-5-1991 |
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... |
| 4896354 |
Image reception system |
| Jan-23-1990 |
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... |
| 4682359 |
Television picture and sound scrambler and method |
| Jul-21-1987 |
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... |
| 4599646 |
Method and apparatus for identifying unauthorized or defective converter/decoder boxes in CATV system |
| Jul-8-1986 |
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... |
| 4521809 |
Method and apparatus for controlling access to selected television programs |
| Jun-4-1985 |
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... |
| 4317213 |
Television reception interfering apparatus |
| Feb-23-1982 |
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... |
| 4216500 |
Encoding and decoding system |
| Aug-5-1980 |
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... |
| 4085422 |
Fee-charging apparatus for television sets |
| Apr-18-1978 |
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... |
