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7630492 |
Secure audio stream scramble system
A process for distributing digital audio sequences according to a nominal flux format including a succession of fields, each of which includes at least one digital block clusterizing a selected...
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7606366 |
Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation
Apparatus and methods are provided for embedding or embedding digital data into an analog host or cover signal. A distributed signal feature of the cover signal in a particular domain (time,...
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7568100 |
Steganographic method and device
An apparatus and method for encoding and decoding additional information into a stream of digitized samples in an integral manner. The information is encoded using special keys. The information is...
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7545936 |
Method and device for incorporating additional information into main information through electronic watermarking technique
Two data units are selected from main information, such as MIDI data, into which additional information is to be incorporated, to calculate a difference between respective values of the two data...
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7487356 |
Digital watermarking system using scrambling method
An encoding apparatus that embeds a watermark in host data is provided. A multiplexer generates a plurality of bit sequences by adding initial data to the head of the watermark. A scrambler...
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7460667 |
Digital hidden data transport (DHDT)
A system for embedding auxiliary digital information into a primary digital signal to form a composite digital signal. Auxiliary data bits modulate a pseudo-random (e.g., PN) sequence to provide an...
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7418110 |
Method and apparatus for compressed-domain watermarking
A method and apparatus for inserting a low frequency watermark into a compressed data stream carrying compressed content is disclosed. A portion of the compressed data stream is decoded to generate...
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7403617 |
System and method for copy protection for digital signals
Embodiments of the present invention provide for the copy protection of distributed material after conditional access is applied, regardless of where the material is distributed. The solutions...
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7403622 |
Process for managing a symmetric key in a communication network and devices for the implementation of this process
A symmetric key management process in a communication network comprising a source device furnished with a source of data to be broadcast over the network and at least one receiver device intended...
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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...
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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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7352864 |
Display device
A display device comprises a nonvolatile memory for storing an amount of adjustment obtained in a blanking adjustment most recently performed for a particular video signal, means for judging...
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7292230 |
Method of deactivating device lock state, and electronic device
An electronic device comprises a touch screen and is configured to enter a lock state upon the fulfilment of a predetermined condition. The device is configured to display one or more images on the...
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7281272 |
Method and system for copyright protection of digital images
A method and system for protecting digital images copied from a video RAM, including the steps of transmitting stored pixel data from a computer memory to a video RAM, identifying protected pixel...
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7251328 |
System for secure decryption of streaming media using selective decryption of header information and decryption of reassembled content
A system provides improved security in a streaming media decoder includes decryption of encoded media information at the media layer, within a decoder component of a playback device. A content...
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7123718 |
Utilizing data reduction in stegnographic and cryptographic systems
The present invention relates to methods for protecting a data signal using the following techniques: applying a data reduction technique to reduce the data signal into a reduced data signal;...
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7103184 |
System and method for sign mask encryption and decryption
In general, one embodiment of the invention involves a method to protect the integrity of the sign mask. The method involves computing a key shared by a plurality of software modules employed...
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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...
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7065212 |
Data hiding in communication
Signature information, representing important content of the data, is extracted from a first data block and then embedded in a different block. Data hiding techniques are used to minimize...
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7043019 |
Copy protection for digital motion picture image data
An apparatus and method for displaying a copy-deterrent pattern ( 104 ) within a digital motion picture in order to discourage recording of the motion picture using a video camera or other sampling...
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7043020 |
Smartcard for use with a receiver of encrypted broadcast signals, and receiver
A smartcard for use with a receiver of encrypted broadcast signals comprises a microprocessor for enabling or controlling decryption of said signals. A memory is coupled to the microprocessor. The...
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7023992 |
Data multiplexing device, program distribution system, program transmission system, pay broadcast system, program transmission method, conditional access system, and data reception device
In a data multiplexing device which multiplexes and transmits the transport stream packets of program data consisting of a plurality of data elements constructed in the form of transport stream...
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7000106 |
Methods and apparatus for kernel mode encryption of computer telephony
Disclosed is a computer-readable medium containing program instructions for configuring a first computer so that a first telephony client on the first computer may securely communicate with a...
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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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6980652 |
Combination mastered and writeable medium and use in electronic internet appliance
An optical medium uses a single structure or format (such as identical materials, layers and the like) for both a region for holding mastered data and a writeable area. In one aspect, a writeable...
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6976010 |
Method for syndicating online content
A method and system for making available syndicated content on-line from a variety of content providers while enforcing the exclusivity requirements for each of the content providers. The method...
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6971012 |
Motion picture electronic watermark system
To provide an electronic watermark method and system for which the detection reliability of embedded information does not depend on the strength of signals that are measured in frames. To achieve...
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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...
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6947562 |
Electronic watermark detecting/inserting device
In an electronic watermark detecting/inserting device which includes an electronic watermark detecting section ( 30 ) for detecting a first electronic watermark from a first DCT coefficient of an...
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6944298 |
Steganographic encoding and decoding of auxiliary codes in media signals
One aspect of the invention is a method of decoding an auxiliary code embedded in an audio signal. The method performs a statistical decoding of a multibit auxiliary code embedded in an audio...
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6907124 |
Optical encryption and decryption method and system
The invention relates to securing of information utilising optical imaging technologies and more specifically to phase encryption and decryption of images. An image is encrypted into a mask having...
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6871180 |
Decoding of information in audio signals
Systems and methods are provided for decoding a message symbol in an audio signal. This message symbol is represented by first and second code symbols displaced in time. Values representing the...
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6836549 |
Method and apparatus for synthesizing and reducing the effects of video copy protection signals
A method and apparatus for defeating copy protection signals in a video signal, and also for providing copy protection signals for a video signal, is disclosed. The defeat technique generally...
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6754347 |
Input/output unit, input/output method, and receiving unit
A switching portion of an IRD supplies a non-descrambled TS (transport stream) received from a front end portion or a descrambled TS received from a descrambler to a DVCR connected to an IEEE 1394...
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6725374 |
Method for the execution of an encryption program for the encryption of data in a microprocessor-based portable data carrier
A method for the execution of an encryption program for the encryption of data in a microprocessor-based portable data carrier is described, with the encryption program comprising several...
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6618484 |
Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels
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...
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6574338 |
Information delivery system and method
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...
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6529600 |
Method and device for preventing piracy of video material from theater screens
A method and device for preventing video tape piracy of video material shown by an electronic projector by varying frequently the frame rate, line rate or pixel rate of the projector. In a...
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6459794 |
Process for scrambling and process for descrambling digital video data and devices implementing the processes
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...
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6408076 |
Digital video broadcasting
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...
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6393128 |
System for broadcasting data signals in a secure manner
A system for broadcasting data signals in a secure manner comprises means for encrypting the data signals using a first key, means for broadcasting the encrypted data signals to subscribers, means...
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6345100 |
Robust watermark method and apparatus for digital signals
Watermark data is encoded in a digitized signal by forming a noise threshold spectrum which represents a maximum amount of imperceptible noise, spread-spectrum chipping the noise threshold spectrum...
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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...
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6320965 |
Secure watermark method and apparatus for digital signals
Watermark data is encoded in a digitized signal by forming a noise threshold spectrum which represents a maximum amount of imperceptible noise, spread-spectrum chipping the noise threshold spectrum...
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6272222 |
Method of and apparatus for manipulating digital data works
A method of hiding copyright related messages within digital data works is taught. The method relies on modifying data elements in the work according to certain rules which depend on the actual...
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6208737 |
Method and apparatus for television signal scrambling using the replacement of synchronizing and color subcarrier signals with an alternative time base inherent in a QPSK audio subcarrier
A novel method and apparatus for scrambling a television signal includes using a synchronization separator to separate a synchronization signal from an input audio-visual signal. The...
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6175628 |
Method and system for broadcasting/distributing digital audio and video to a television
An audio input interface (122) receives a digital audio signal and identifies an audio bitstream which is optionally decrypted by a decryption unit (123), and decoded by an audio decoding unit...
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6145081 |
Method and apparatus for preventing removal of embedded information in cover signals
Apparatus and methods are provided for embedding watermark information into a cover signal, such as an audio signal, video signal, or still image signal, in a manner that prevents the watermark...
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6118872 |
Apparatus and method for controlling secret data by using positions of input image points on an image and a sequence of the positions
A secret data management apparatus includes an image display unit which displays an image on a display monitor. A position/sequence input unit inputs positions of input image points on the image...
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6104812 |
Anti-counterfeiting method and apparatus using digital screening
An apparatus and process for hiding the secondary image within the primary image and generating a high quality hard copy of the unified elemental image of a variety of media. The process comprises...
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