| 7043022 |
Packet order determining method and apparatus |
| May-9-2006 |
A transmitter adds packet transmission order information to transmitted packets using a forward error device (416) and a masking device (420). The masking device (420) receives ordering masks (610) from... |
| 7043022 |
Packet order determining method and apparatus |
| May-9-2006 |
A transmitter adds packet transmission order information to transmitted packets using a forward error device (416) and a masking device (420). The masking device (420) receives ordering masks (610) from... |
| 7043019 |
Copy protection for digital motion picture image data |
| May-9-2006 |
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 recording... |
| 7039614 |
Method for simulcrypting scrambled data to a plurality of conditional access devices |
| May-2-2006 |
In accordance with one embodiment, a method for storing a normal scrambled digital program is provided. The method includes receiving a scrambled program, and receiving a plurality of access requirements.... |
| 7024175 |
System for masking microphonic voice signals in wired telecommunications equipment |
| Apr-4-2006 |
A system to thwart eavesdropping on microphonic audio signals generated by a powered telecommunications device connected to a communications line, comprising a noise generator for applying low level noise... |
| 7020281 |
Timing attack resistant cryptographic system |
| Mar-28-2006 |
A method for determining a result of a group operation performed an integral number of times on a selected element of the group, the method comprises the steps of representing the integral number as a... |
| 7003118 |
High performance IPSEC hardware accelerator for packet classification |
| Feb-21-2006 |
An architecture for a high performance IPSEC accelerator. The architecture includes components for scanning fields of packets, programming an IPSEC services device according to the scanned fields, and... |
| 6996237 |
Apparatus and methods for including codes in audio signals |
| Feb-7-2006 |
Apparatus and methods for including a code having at least one code frequency component in an audio signal are provided. The abilities of various frequency components in the audio signal to mask the code... |
| 6983051 |
Methods for audio watermarking and decoding |
| Jan-3-2006 |
An identification code signal is hidden in a carrier signal (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned. The carrier... |
| 6954541 |
Method of detecting changes occurring in image editing using watermarks |
| Oct-11-2005 |
A method of editing a digital image having associated embedded data, such as printing hints, includes embedding a first watermark in the original image before the image is edited. The first watermarking... |
| 6931527 |
Method and system for ensuring the security of fax transmission using an identifying card |
| Aug-16-2005 |
The invention concerns a method and system for safely transmitting a fax between a transmitter sending the fax and at least a receiver (11) receiving the fax (162) using a fax machine (161)... |
| 6915002 |
Multi-carrier watermarks using carrier signals modulated with auxiliary messages |
| Jul-5-2005 |
A watermark embedder encodes auxiliary information, such as a binary message, into a host media signal by modulating message signals with two or more corresponding carrier signals to form a watermark signal... |
| 6901514 |
Secure oblivious watermarking using key-dependent mapping functions |
| May-31-2005 |
A method for embedding a watermark into content is disclosed. The content contains content samples. The method including the steps of: receiving the content, creating a continuous watermark sequence from... |
| 6850252 |
Intelligent electronic appliance system and method |
| Feb-1-2005 |
An intelligent electronic appliance preferably includes a user interface, data input and/or output port, and an intelligent processor. A preferred embodiment comprises a set top box for interacting with... |
| 6842522 |
Secure digital video disk and player |
| Jan-11-2005 |
A method for recoding data on an optical medium such as DVD. The method includes receiving main data from a data source, determining a plurality of data frame values in response to the main data, inverting... |
| 6813695 |
Memory access method and circuit configuration |
| Nov-2-2004 |
A cache memory serves for accelerating accesses to an external memory of a microprocessor. Instead of an actually occurring hit event, a cache miss is signaled to the microprocessor. The reversal is randomly... |
| 6778682 |
Redundantly embedding auxiliary data in source signals |
| Aug-17-2004 |
The present invention relates to a data hiding method that includes changing values of input pixels corresponding to an input two-dimensional image to encode an N-bit auxiliary data signal therein, thereby... |
| 6775557 |
Telephone method and apparatus |
| Aug-10-2004 |
A telephone and telephone answering apparatus and method are described for using secondary information embedded in audio passages included in phone calls. The telephone and telephone answering device monitors... |
| 6768808 |
Encoding and decoding methods in which decryption data is conveyed steganographically within audio or visual content |
| Jul-27-2004 |
A content object is steganographically encoded with plural-bit decryption instruction data. A recipient can decode this decryption data, and apply it to the content. |
| 6760438 |
System and method for Viterbi decoding on encrypted data |
| Jul-6-2004 |
A system and method for Viterbi decoding on encrypted data is disclosed. At the receiver, maximum likelihood decoding is performed based on received input in the encryption domain. When selecting a path... |
| 6754364 |
Methods and systems for fingerprinting digital data |
| Jun-22-2004 |
Methods and systems for fingerprinting digital data are described. In the described embodiment, Direct Sequence Spread Spectrum (DSSS) technology is utilized. Unique fingerprinting words are defined where... |
| 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... |
| 6707930 |
Method and arrangement for embedding a watermark in an information signal |
| Mar-16-2004 |
The invention relates to a method of embedding a watermark W in an information signal P, to a corresponding arrangement for embedding a watermark W in an information signal P, to an information signal... |
| 6683958 |
Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation |
| Jan-27-2004 |
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, frequency... |
| 6675146 |
Audio steganography |
| Jan-6-2004 |
An input content signal--representing audio or video--is encoded to hide plural-bit auxiliary data therein. The process generates an intermediate signal that is a function of (a) the plural-bit auxiliary... |
| 6674861 |
Digital audio watermarking using content-adaptive, multiple echo hopping |
| Jan-6-2004 |
A method, an apparatus and a computer program product for adaptive, content-based watermark embedding of a digital audio signal (100) are disclosed. Corresponding watermark extracting techniques are also... |
| 6654480 |
Audio appliance and monitoring device responsive to watermark data |
| Nov-25-2003 |
A consumer audio device decodes auxiliary control data that is hidden in audio information. The auxiliary control information can be used to trigger some response in the device, such as enabling or disabling... |
| 6628802 |
Marking and determining distortion in an image |
| Sep-30-2003 |
The present invention provides methods and apparatus that reverse the notion of the attack process in using intentional image distortion techniques as a means of indelibly marking an original image. It... |
| 6594373 |
Multi-carrier watermarks using carrier signals modulated with auxiliary messages |
| Jul-15-2003 |
A watermark embedder encodes auxiliary information, such as a binary message, into a host media signal by modulating message signals with two or more corresponding carrier signals to form a watermark signal... |
| 6590997 |
Files and methods employing common information in both header and steganographic embedding |
| Jul-8-2003 |
A file includes both content data (e.g., audio or visual information) and header data. At least some of the header data is steganographically encoded within the content data. This arrangement permits some... |
| 6587943 |
Apparatus and method for limiting unauthorized access to a network multicast |
| Jul-1-2003 |
An apparatus and method for limiting unauthorized access to a multicast by one or more members of a subnet reconfigures the multicast if all subnet members participating in the multicast do not reply to... |
| 6587821 |
Methods for decoding watermark data from audio, and controlling audio devices in accordance therewith |
| Jul-1-2003 |
Methods for decoding auxiliary control information from audio and using same to control an audio appliance. Various arrangements are disclosed. One method correlates a filtered version of the audio with... |
| 6584138 |
Coding process for inserting an inaudible data signal into an audio signal, decoding process, coder and decoder |
| Jun-24-2003 |
In a coding method and a coder for introducing a non-audible data signal into an audio signal, the audio signal is first transformed to a spectral range and the masking threshold of the audio signal 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... |
| 6567780 |
Audio with hidden in-band digital data |
| May-20-2003 |
Digital audio data is processed to convey plural bits of hidden auxiliary data. The auxiliary data can be used for identification purposes, for device control (disabling recording and the like), etc. The... |
| 6567535 |
Steganographic system with changing operations |
| May-20-2003 |
Multi-bit auxiliary information is hidden in audio and imagery (e.g., digital photographs, video), using steganographic techniques. Such information can be used for various purposes, including identifying... |
| 6560350 |
Methods for detecting alteration of audio |
| May-6-2003 |
The adage "photos don't lie" is no longer reliable. The advent of digital editing tools makes it relatively easy to move, add, or delete features from photographs. Audio content is similarly susceptible... |
| 6542620 |
Signal processing to hide plural-bit information in image, video, and audio data |
| Apr-1-2003 |
A variety of techniques for steganographically encoding digital data into, and decoding steganographically data from, audio, video, and image signals ("content signals") are disclosed. One method encodes... |
| 6539095 |
Audio watermarking to convey auxiliary control information, and media embodying same |
| Mar-25-2003 |
Methods of processing audio to convey auxiliary control information therein without audible evidence of data alteration. Various arrangements are disclosed. One receives plural bit auxiliary data in which... |
| 6539092 |
Leak-resistant cryptographic indexed key update |
| Mar-25-2003 |
Methods and apparatuses for increasing the leak-resistance of cryptographic systems using an indexed key update technique are disclosed. In one embodiment, a cryptographic client device maintains a secret... |
| 6529600 |
Method and device for preventing piracy of video material from theater screens |
| Mar-4-2003 |
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 preferred embodiment... |
| 6519352 |
Encoding and decoding in accordance with steganographically-conveyed data |
| Feb-11-2003 |
A digital content object comprised of plural portions is steganographically encoded, with different portions of the object conveying different steganographic data. Data steganographically conveyed in a... |
| 6513117 |
Certificate handling for digital rights management system |
| Jan-28-2003 |
A delivery system for managing security keys uses three key pairs to establish, register, move and revoke rights in a device to view protected information. The first and second key pairs cooperate to establish... |
| 6493457 |
Electronic watermarking in the compressed domain utilizing perceptual coding |
| Dec-10-2002 |
A method and apparatus are described for inserting a watermark in the compressed domain. The watermark inserted does not require a reference. An overall watermarking system incorporating the invention... |
| 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)]... |
| 6438251 |
Method of processing image information and method of preventing forgery of certificates or the like |
| Aug-20-2002 |
Additional information, composed of characters, images, voice, etc., is converted into two-dimensional codes and then converted into a visible additional image to be embedded. The additional image is embedded... |
| 6427012 |
Apparatus and method for embedding and extracting information in analog signals using replica modulation |
| Jul-30-2002 |
Apparatus and methods are provided for embedding or encoding auxiliary signals into an analog host or cover signal. A replica of the cover signal or a portion of the cover signal in a particular domain... |
| 6418232 |
Method of authenticating digital-watermark pictures |
| Jul-9-2002 |
An extraction process includes the steps of carrying out a geometric transformation on a picture being inspected to transform the size of the picture being inspected into a reduced scale of an original... |
| 6363159 |
Consumer audio appliance responsive to watermark data |
| Mar-26-2002 |
A consumer audio device decodes auxiliary control data that is hidden in audio information. The auxiliary control information can be used to trigger some response in the device, such as enabling or disabling... |
| 6353672 |
Steganography using dynamic codes |
| Mar-5-2002 |
An input content signal--representing audio or video--is steganographically encoded to hide plural-bit auxiliary data therein. The encoding operation changes over time, e.g., by using different "key" data... |
