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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 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 plurality of coefficients corresponding to digitally coded audio elements,... | 05/22/2012 |
| 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 audibility of the watermark and to improve the robustness of the watermarkin... | 12/20/2011 |
| 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 conditional access table stream, a program stream directory stream, an encr... | 04/26/2011 |
| 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 electronic mail into a RAM of a controller. A CPU extracts certification info... | 05/20/2008 |
| 7369658 | Secure modulation and demodulation A system and method are disclosed for securely transmitting and receiving a signal. A nonlinear keying modulator is used in the transmitter to encrypt the signal using a nonlinear keying modulation technique. A nonlinear keying demodulator is used in the receiver to... | 05/06/2008 |
| 7330562 | Watermarking in the time-frequency domain Methods and systems for time-frequency domain watermarking of media signals, such as audio and video signals. An encoding method divides the media signal into segments, transforms each segment into a time-frequency representation, and computes a time-frequency domai... | 02/12/2008 |
| 7321667 | Data hiding through arrangement of objects The present invention provides steganographic embedding techniques. A digital watermark signal is reduced to a set of spatial positions. The set of spatial positions sufficiently conveys the digital watermark signal. Message objects are positioned according to the s... | 01/22/2008 |
| 7284051 | Relaying apparatus for use in a network system A relaying apparatus comprises a client terminal, many server terminals connected via network to the client terminal, a DNS responding device which accepts a DNS inquiry from the client terminal via a client-side DNS device, and one path load measuring device for ea... | 10/16/2007 |
| 7277499 | Additive DC component detection included in an input burst signal A method for processing an input burst signal comprising a first step for identifying an additive DC component and generating an output signal, which is representative for an estimated value of said DC component. The method further comprises a second step for detect... | 10/02/2007 |
| 7260829 | Terminal with multiple audio and video A novel advanced set top terminal capable of digital decompression, displaying picture-on-picture, outputting multiple video channels, outputting multiple audio signals, outputting multiple audio channels corresponding to a single video channel, and other advanced f... | 08/21/2007 |
| 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 adder for summing the original data and the additional data, a first a... | 08/14/2007 |
| 7242775 | Optical pulse calibration for quantum key distribution Methods and systems for generating calibrated optical pulses in a QKD system. The method includes calibrating a variable optical attenuator (VOA) by first passing radiation pulses of a given intensity and pulse width through the VOA for a variety of VOA settings. Th... | 07/10/2007 |
| 7224819 | Integrating digital watermarks in multimedia content A method for tracking media signals in multimedia content is provided by uniquely identifying the multimedia content with a digital watermark identifier. A video channel is preferably embedded with a first watermark identifier. The first identifier uniquely identifi... | 05/29/2007 |
| 7191334 | Embedding auxiliary data in a signal A method is disclosed for embedding auxiliary data in a signal. The data is encoded into the relative position or phase of one or more basic watermark patterns. This allows multi-bit data to be embedded by using only one or a few distinct watermark patterns. ... | 03/13/2007 |
| 7171020 | Method for utilizing fragile watermark for enhanced security A fragile watermark is embedded in a document. The fragile watermark provides enhance security. In one implementation, a method is provided for embedding information in an image so that the image will have different information when a scanning or printing process re... | 01/30/2007 |
| 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. The code selector associates distinct input data strings to be embedded... | 01/02/2007 |
| 7151477 | Signal detection A transmitted signal and a received signal are combined and the combination is expected to determine whether or not a target signal is present. Either the transmitted signal or the received signal is combined with an auxiliary signal containing a range of frequencie... | 12/19/2006 |
| 7146503 | System and method of watermarking 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 to whether each block is odd- or even-numbered. The system windows the... | 12/05/2006 |
| 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 recording device. A copy-deterrent pattern (104) could b... | 05/09/2006 |
| 7020304 | Digital watermarking and fingerprinting including synchronization, layering, version control, and compressed embedding This disclosure describes several video watermarking and fingerprinting enhancements. These enhancements include synchronizing watermark detectors with one-dimensional calibration signals, layering digital watermarks, watermarks for version control, compressed domai... | 03/28/2006 |
| 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 sequences (i.e., “chess watermarks”) to improve the balance of positive a... | 03/28/2006 |
| 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 carrier signal by modulating the oscillatory rate of the carrier signal. The... | 03/28/2006 |
| 7006555 | Spectral audio encoding Blocks of audio are encoded based upon corresponding first and second frequencies. The first and second frequencies are hopped from block to block. An audio quality measure (AQM) is computed for each block of audio such that, if x out of y blocks of audio have an AQ... | 02/28/2006 |
| 6975517 | Embedded preemphasis and deemphasis circuits Exemplary techniques for providing an embedded preemphasis circuit and/or a deemphasis circuit in a printed circuit board (PCB) or other circuit device are disclosed. In particular, a technique for preemphasizing and/or deemphasizing transmitted signals in a PCB-bas... | 12/13/2005 |
| 6959448 | Radio VOD system A radio VOD (Video-On-Demand) system is disclosed. A server provides a video file and an audio file, and a server manager manages the server so as to transmit a video file and an audio file at the user's request. An exchange converts the video file and the audio fil... | 10/25/2005 |
| 6952486 | Digital watermark embedding method and apparatus, and digital watermark A specific frequency extraction unit extracts a specific frequency component signal from an input image signal, a phase controller and amplitude controller control at least one of the phase and amplitude of the specific frequency component signal in accordance with ... | 10/04/2005 |
| 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 zero-knowledge proof, which proves the correspondence between the inputs and o... | 08/30/2005 |
| 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 diverse data types are also generated. The command blocks ... | 02/24/2004 |
| 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). The watermark is embedded at the lower sample rate by a conve... | 02/10/2004 |
| 6683958 | 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, frequency or space) is calculated and compared with a set of pre... | 01/27/2004 |
| 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 unscrambled and as a low-side oscillator if the incoming RF signa... | 07/22/2003 |
| 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 file, such as a .WAV file, representing an audio signal to be w... | 05/27/2003 |
| 6427012 | Apparatus and method for embedding and extracting information in analog signals using replica modulation 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 (time, frequency or space) is generated according to ... | 07/30/2002 |
| 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 result of convolution with a threshold to determine if ther... | 07/23/2002 |
| 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 spectrum-spreading operation using a PN sequence g(t). This first sprea... | 07/23/2002 |
| 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 to be embedded is inputted. In the case of a watermark, th... | 05/09/2000 |
| 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 encryption algorithm; (b) a transmitter; (c) a receiver; and (d) a d... | 01/28/1997 |
| 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 maintaining low group delay in the audio signal. The first ... | 06/18/1996 |
| 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 scrambled audio. This produces a double sideband signal that... | 11/28/1995 |
| 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 digital signal link to a receiver section comprising a de-... | 07/04/1995 |
