Matches 1 - 50 out of 73 1 2 >


Match Document Document Title
8903091 Optical system with imparted secure codes  
A secure optical communication system and method are disclosed. Short optical pulses are first modulated with data, then dispersed in time so that they spread out over multiple bit periods, then...
8789201 Secure personal content server  
A local content server system (LCS) for creating a secure environment for digital content is disclosed, which system comprises: a communications port in communication for connecting the LCS via a...
8739295 Secure personal content server  
A local content server system (LCS) for creating a secure environment for digital content is disclosed, which system comprises: a communications port in communication for connecting the LCS via a...
8738930 Chip integrated protection means  
The invention relates to a chip for processing a content, comprising at least a microprocessor. Said chip includes an integrated non-volatile programmable memory for storing protection data and...
8688993 Method and apparatus for determining and using the sampling frequency for decoding watermark information embedded in a received signal sampled with an original sampling frequency at encoder side  
In watermarked signal decoding, the embedded message is decoded by correlating the reference patterns with the watermarked signal. The watermark detector decides, depending on the size of the...
8424083 Controlling activation of an application program in an audio signal processing system  
User operates a selection switch to instruct temporary activation of an application. For the application of which the temporary activation has been instructed, a CPU of a console allocates...
8306811 Embedding data in audio and detecting embedded data in audio  
A method of embedding data into an audio signal provides a data sequence for embedding in the audio signal and computes masking thresholds for the audio signal from a frequency domain transform of...
8300813 Secure information transfer based on global position  
Secure communication of information is effected from a first party to a second party when the first party knows its own global location and the global location of the second party, and employs...
8184809 Adaptive and progressive audio stream scrambling  
A process for distributing digital audio sequences according to a nominal stream format that include a succession of frames, each of which includes at least one digital audio block grouping a...
8171561 Secure personal content server  
A local content server system (LCS) for creating a secure environment for digital content is disclosed, which system comprises: a communications port in communication for connecting the LCS via a...
8130963 Method and apparatus for secure key delivery for decrypting bulk digital content files at an unsecure site  
Rather than downloading each content document on demand from the publisher location to the user site, at the publisher location, each content document is encrypted and then multiple encrypted...
8127361 Hierarchical scheme for secure multimedia distribution  
Various quality versions of an electronic content are defined, and one or more distortion algorithms (22, 32) that are executable to generate a lower quality version of the electronic content by a...
8081757 Blind watermarking of audio signals by using phase modifications  
Watermarking of audio signals intends to manipulate the audio signal in a way that the changes in the audio content cannot be recognised by the human auditory system. In order to reduce the...
7996230 Selective security masking within recorded speech  
A marker is derived from an interaction between a person and an agent of a business and the agent's user interface. A part of a speech signal that corresponds to a portion of the person's special...
7933411 Method of constructing MPEG program streams from encrypted MPEG transport streams  
An electronic device comprising: a transport stream analyzer, the transport stream analyzer adapted to receive an encrypted MPEG transport stream and to output a program stream map stream, a...
7844072 Watermark embedding and detection of a motion image signal  
Methods and arrangements are disclosed for embedding and detecting a watermark in a cinema movie, such that the watermark can be detected in a copy made by a handheld video camera. The watermark...
7802101 System and method of retrieving a watermark within a signal  
A system and method of retrieving a watermark in a watermarked signal are disclosed. The watermarked signal comprises odd and even overlapped blocks where the watermark is contained in the even...
7664274 Enhanced acoustic transmission system and method  
A system to generate an enhanced acoustic transmission signal includes a carrier signal generator to generate a carrier signal. A data signal generator is provided to receive data and to generate...
7660982 Subscription broadcast security system  
A subscription broadcast security system for preventing theft of an encrypted program datastream utilizes an encryption protocol with steganographic supplementation. A decoder includes a...
7580522 Digital video broadcasting receiver  
A digital video broadcasting receiver comprising a first input for receiving a first transport stream of data (TS#1) and a second input for receiving a second transport stream of data (TS#2), each...
7558389 Method and system of generating a speech signal with overlayed random frequency signal  
A method and apparatus utilizing prosody modification of a speech signal output by a text-to-speech (TTS) system to substantially prevent an interactive voice response (IVR) system from...
7543148 Audio watermarking with covert channel and permutations  
Audio signals, such as a music clip, are inserted with detectable watermarks. The inserted watermark can identify the content producer and provide a signature embedded in the audio signal and...
7529941 System and method of retrieving a watermark within a signal  
A system and method of retrieving a watermark in a watermarked signal are disclosed. The watermarked signal comprises odd and even overlapped blocks where the watermark is contained in the even...
7475246 Secure personal content server  
A local content server system (LCS) for creating a secure environment for digital content is disclosed, which system comprises: a communications port in communication for connecting the LCS via a...
7451319 System and method of watermarking a signal  
A system and method of generating a watermarked signal are disclosed. The system segments the signal into overlapping blocks using a window function and processes the overlapping blocks according...
7376843 Remote control of VCR with electronic mail  
A security apparatus and a security method for controlling electric devices by use of electronic mails. A modem receives an electronic mail sent from a sending side and stores the received...
7257710 Additional-data embedding apparatus and additional-data embedding method  
The present invention provides an additional-watermark embedding apparatus for embedding predetermined additional data into original data. The additional-watermark embedding apparatus includes an...
7159118 Methods and apparatus for embedding and recovering watermarking information based on host-matching codes  
The invention provides apparatus and methods for embedding and recovering watermarking information based on host-matching codes. A code selector provides codes to be embedded in the host signal....
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...
7020285 Stealthy audio watermarking  
Described herein is technology for inserting and detecting watermarks in signals, such as a music clip. In one described implementation, a watermarking system employs chess spread-spectrum...
7020286 Modulation of dynamical systems for communication  
A system for modulating and demodulating signals that provides a new class of signal modulators and their corresponding demodulators. The modulation scheme embeds in an information signal a...
6937728 Verifiable anonymous channel  
Two El Gamal ciphertexts, which are input to a two-input two-output unit switching gates SW forming a permutation network, are randomized with a random number and randomly permuted, and a...
6697942 Method for remotely managing a remote device using an electronic mail message  
A data formatting method for embedding diverse data types in an electronic mail message includes the step of forming a network compliant electronic mail message header. Command blocks representing...
6690812 Watermark insertion and extraction into and from a high quality signal is performed using sample rate conversion  
A high-quality signal, for example, a unity-bit coded (DSD) audio signal having a 2.822 MHz bit rate (fs1) is converted to a lower sample rate (fs3) PCM signal by a sample rate converter (102)....
6597789 Video/audio scrambling with single conversion tuners  
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...
6571144 System for providing a digital watermark in an audio signal  
The foregoing problems are solved and a technical advance is achieved by a computer-implemented system for providing a digital watermark in an audio signal. In a preferred embodiment, a audio...
6424925 Circuit and method for detecting a tone signal  
A tone detector includes at least one circuit (hereinafter “single phase reference matcher”) that not only performs a convolution of an input signal with a reference signal, but also compares the...
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...
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...
5598471 Method and apparatus for encoding and decoding of audio transmission signals  
A system for encoding and decoding an audio transmission signal comprises: (a) an encoder with a frequency-varying means to vary the carrier frequency of the audio signal according to an...
5528692 Frequency inversion scrambler with integrated high-pass filter having autozero to remove internal DC offset  
A frequency inversion scrambler in a cordless telephone utilizes an integrated high-pass filter (14) between a first stage low-pass filter (12) and modulator (16) to reduce the filter order while...
5471531 Method and apparatus for low cost audio scrambling and descrambling  
Audio signals are descrambled by double sideband modulating the scrambled audio signal with a modulation carrier having a carrier frequency slightly above the highest audio signal present in the...
5430798 Scrambled TV-IF signal transmission system  
A cable TV signal transmission system comprising a Nyquist filter carrier recovery circuit, a mixer, a level shifter and a pre-emphasis circuit for transmitting scrambled TV-IF signals on an FM or...
5206908 Method and apparatus for detecting timing pulses for scrambled television system  
A method and apparatus for detecting timing pulses for descrambling a scrambled television signal, wherein a video IF signal and a sound IF signal are separated from a scrambled television IF...
5159631 Audio scrambling system using in-band carrier  
Audio signals are scrambled by single side band modulating with a modulation signal carrier having a frequency lying within the audio frequency band so that the signals are frequency translated...
5144666 Decoder to decode an encrypted sound  
Decoder for encrypted sound signals which are encrypted by modulating the sound signals on an alternating carrier signal having a frequency which is generally unknown to receiving parties. A...
5058159 Method and system for scrambling and descrambling audio information signals  
Audio signals are scrambled by inverting the original; frequency spectrum so that frequency portions originally lying at the lower end of the audio frequency band are shifted to the upper end...
4956862 Method of providing sound privacy system compatible with mono and btsc stereo audio  
In order to provide secure access to the audio portion of a television signal, the audio portion of a TV signal is modulated at a frequency that is offset from the standard carrier frequency. In...
4922532 Sync suppression scrambling and descrambling of television signals for subscription TV  
The quality of sound delivered to a subscriber viewing a channel which has been scrambled using sync suppression scrambling, particularly when the program is being transmitted with stereo sound,...
4910771 Television signal converter  
A television signal converter includes a CATV tuner having a channel converting function, a gain changing circuit for descrambling the output from the CATV tuner and the like, in order to convert...

Matches 1 - 50 out of 73 1 2 >