| 6721423 |
Lost cost countermeasures against compromising electromagnetic computer emanations |
| Apr-13-2004 |
A set of methods is specified whereby software reduces compromising electromagnetic emanations of computers that could otherwise allow eavesdroppers to reconstruct sensitive processed data using periodic... |
| 6715076 |
Video signal authentication system |
| Mar-30-2004 |
A video signal authentication system utilizes selected portions of a video signal to generate authentication codes that are transmitted in association with respective portions of the signal. The video... |
| 6714650 |
Recording of scrambled digital data |
| Mar-30-2004 |
A system for transmitting and recording digital data is included. Further, a system for transmitting transmit scrambled audio data that is to be recorded on a mini disc reader is included. A system for... |
| 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... |
| 6694022 |
Digital broadcasting receiver |
| Feb-17-2004 |
A digital broadcasting receiver includes a tuner unit for receiving digital broadcasting in formation, an information storage unit for storing the digital broadcasting information together with copyright... |
| 6691310 |
Information receiver and information transmission and reception method providing information usage status |
| Feb-10-2004 |
An information receiver comprising a unit receiving information having a package number identifying the information, a first storage section where said package number is stored, a second storage section... |
| 6690795 |
Multiple keys for decrypting data in restricted-access television system |
| Feb-10-2004 |
An encryption system for restricted-access television systems. Multiple decryption keys are used to decrypt encrypted material which is transmitted to customers of a restricted-access television system. |
| 6687383 |
System and method for coding audio information in images |
| Feb-3-2004 |
A system and method for encoding sound information in image sub-feature sets comprising pixels in a picture or video image. Small differences in intensity of pixels in this image set are not detectable... |
| 6678378 |
3-dimensional shape data encryption and decryption |
| Jan-13-2004 |
Encryption and decryption methods for 3-dimensional shape data, especially copyrighted data, useful for detecting unauthorized use or piracy of a 3-dimensional object's shape represented by the 3-dimensional... |
| 6671376 |
Video scramble/descramble apparatus |
| Dec-30-2003 |
A video scramble apparatus has a scrambler for scrambling an input video signal, and a video encoder for performing interframe predictive coding of the video signal after scrambling, and the scrambler... |
| 6665417 |
Method of judging digital watermark information |
| Dec-16-2003 |
A digital watermark information judging method is provided for detecting digital watermark information which is embedded in at least one element of digital data by altering at least one data value of the... |
| 6647149 |
Methods and apparatus for securely transmitting and processing digital image data |
| Nov-11-2003 |
Methods and apparatus are provided for securely transmitting and processing digital image data for display. The invention provides for decomposing, compressing, and scrambling digital image data and forwarding... |
| 6647129 |
Method and system for encoding image and audio content |
| Nov-11-2003 |
Image or audio content data is encoded to steganographically convey plural bit auxiliary data. The content data is thereafter subjected to lossy compression/decompression, and the auxiliary data can still... |
| 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... |
| 6625298 |
Method and system for embedding extra information, method and system for decoding |
| Sep-23-2003 |
The invention relates to a method and a system (100) for embedding extra information in an input signal (101). Groups of one or more candidate frames in the input signal (101) are associated with respective... |
| 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... |
| 6606393 |
Message authentication code using image histograms |
| Aug-12-2003 |
According to the principles of the invention, there is provided a system for generating a message authentication code for a conventional digital video stream. The system operates on the rows and columns... |
| 6597789 |
Video/audio scrambling with single conversion tuners |
| Jul-22-2003 |
Conventional decoding systems for scrambled audio-visual signals are improved by providing a dual-side local oscillator that functions as a high-side oscillator if the incoming RF signal is unscrambled... |
| 6591419 |
Digital multi-media device and method relating thereto |
| Jul-8-2003 |
A method of transmitting a transport stream over an IEEE 1394 Serial Bus comprising stripping out of the transport stream identifiable unrequired data so as to reduce the bandwidth of the transport stream,... |
| 6591009 |
Information embedding method, apparatus and recording medium |
| Jul-8-2003 |
To deeply encrypt and embed auxiliary information into image data, table generation means generates a table, based on a quantization error which occurs when image data S0 is converted from a first color... |
| 6590979 |
Method and apparatus for compression compatible video scrambling |
| Jul-8-2003 |
Scrambling and descrambling techniques are described which, unlike many typical scrambling systems, are compatible with all conceivable forms of signal compression systems. The scrambling technique is... |
| 6574338 |
Information delivery system and method |
| Jun-3-2003 |
A satellite-based digital broadcast system is used to provide real-time news, entertainment and informational programs to aircraft passengers in flight. Transmissions from the satellite occur on a time... |
| 6560340 |
Method and apparatus for geographically limiting service in a conditional access system |
| May-6-2003 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6542609 |
Method and apparatus for scrambling a high definition television signal |
| Apr-1-2003 |
Method and apparatus for scrambling a high definition television signal to discourage unauthorized recording of same. While recording per se is not prevented, the resulting recorded signal is rendered... |
| 6532539 |
Process for controlling access to a domestic network and device implementing the process |
| Mar-11-2003 |
The present invention relates to a process making it possible to control access to at least one terminal with address AD by at least one scrambled item with the aid of at least one control word. The process... |
| 6523113 |
Method and apparatus for copy protection |
| Feb-18-2003 |
Copy protection techniques that utilize a watermark and a permission key are disclosed. The copy protection techniques can provide single-copy copy protection in addition to different levels of copy protection.... |
| 6516412 |
Authorization of services in a conditional access system |
| Feb-4-2003 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6510515 |
Broadcast service access control |
| Jan-21-2003 |
Techniques and systems for controlling access to information broadcast over point-to-multipoint resources in radiocommunication systems are described. These techniques can be used to provide controllable... |
| 6487720 |
Apparatus for receiving digital broadcast signal and apparatus for recording and reproducing digital broadcast information included in the digital broadcast signal |
| Nov-26-2002 |
When a received broadcast signal is received in a digital broadcast signal receiving apparatus, an entitlement management message EMM representing broadcast-watching enabling information is extracted from... |
| 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... |
| 6460018 |
Program production and transmission apparatus |
| Oct-1-2002 |
Program production supporting component, transmission equipment controlling component, material creation managing component, and storing component are interconnected through a network, and managing component... |
| 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... |
| 6459793 |
Cable television setback decoder automatic control |
| Oct-1-2002 |
A setback decoder monitors the IF output from a cable-ready receiver and automatically provides a descrambled audio/video signal back to the receiver for output to the subscriber. When the receiver is... |
| 6459794 |
Process for scrambling and process for descrambling digital video data and devices implementing the processes |
| Oct-1-2002 |
The invention relates to a process for scrambling video data in the MPEG2 video format as well as to a process for descrambling data scrambled according to the process of the invention. The scrambled video... |
| 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... |
| 6442283 |
Multimedia data embedding |
| Aug-27-2002 |
Multimedia data embedding, such as video, image or audio data watermarking. In one embodiment, a computer-implemented method first receives a vector x of N data samples, where X=[x(0)x(1) . . . x(N-1)]... |
| 6438692 |
Copy protection apparatus and information recording medium used in this copy protection apparatus |
| Aug-20-2002 |
This invention protects the unauthorized copy of multimedia data, recorded on an information recording medium, by using electronic watermark information and key information. The electronic watermark information... |
| 6408076 |
Digital video broadcasting |
| Jun-18-2002 |
In order to descramble sections of scrambled data interleaved with sections of unscrambled data in a transport stream of broadcast video data, while leaving the sections with the original timing relationship... |
| 6405369 |
Smart card chaining in pay television systems |
| Jun-11-2002 |
A pay television system including a pay television network and a subscriber unit which receives pay television transmissions via the pay television network and displays the pay television transmissions... |
| 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... |
| 6397334 |
Method and system for authenticating objects and object data |
| May-28-2002 |
A system and method for authenticating an image of an object, include at least one identifier associated with the object, a receiver for interrogating the at least one identifier to produce identification... |
| 6381332 |
Cable television setback decoder automatic control |
| Apr-30-2002 |
A setback decoder monitors the IF output from a cable-ready receiver and automatically provides a descrambled audio/video signal back to the receiver for output to the subscriber. When the receiver is... |
| 6377690 |
Safe transmission of broadband data messages |
| Apr-23-2002 |
An arrangement for providing secure transmission of information. The bulk of the information is transmitted over non-secure channels such as broadcast media which terminate on a plurality of receiving... |
| 6349140 |
Information receiving system for descrambling scrambled information and presenting the descrambled information |
| Feb-19-2002 |
A TV signal that was scrambled and transmitted from a CATV center is tuned by a TV tuner for a parent unit or a TV tuner for a child unit based on a command received from a microprocessor. The tuned TV... |
| 6349138 |
Method and apparatus for digital transmission incorporating scrambling and forward error correction while preventing bit error spreading associated with descrambling |
| Feb-19-2002 |
The specification relates to a method and apparatus supporting multiple access, bi-directional data and multimedia transfer described over a hybrid fiber/coax (HFC) network, though applicable to transmissions... |
| 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... |
| 6345101 |
Cryptographic method and apparatus for data communication and storage |
| Feb-5-2002 |
The disclosed invention is a new cryptographic method which is fast and ideally suited for secure, high volume data communication and storage. The data is encrypted at the source using a private key and... |
| 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... |
| 6314188 |
Motion picture data encrypting method and computer system and motion picture data encoding/decoding apparatus to which encrypting method is applied |
| Nov-6-2001 |
Of I, P, and B pictures contained in an MPEG 2 data stream, only the I picture is subjected to encryption such as scramble processing. Scramble rule data used at that time is stored in the lead-in area... |
| 6307939 |
Method and equipment for allocating to a television program, which is already conditionally accessed, a complementary conditional access |
| Oct-23-2001 |
A method and an equipment for allocating to a television program, which is already conditionally accessed, a complementary conditional access. The television program is first received by means provided... |
