Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7366908 | Digital watermarking with content dependent keys and autocorrelation properties for synchronization A digital watermark detection method exploits autocorrelation properties of the watermarked signal that enable synchronization of the digital watermark despite temporal or geometric distortion of the host signal. Other watermark methods employ keys, including a key ... | 04/29/2008 |
| 7362781 | Wireless methods and devices employing steganography Wireless devices and methods employ steganography to convey auxiliary data in addition to audio information. An exemplary application is a battery-powered cell phone, having, e.g., a microphone, a speaker, a modulator, an antenna, and an RF amplifier. The steganogra... | 04/22/2008 |
| 7359512 | Authentication in a quantum cryptographic system A quantum cryptographic device provides authentication services over the optical (quantum) channel and the public channel. In one implementation, polarizers generate optical pulses that have a polarization state based on a bit from a first bit sequence. A polarizati... | 04/15/2008 |
| 7356738 | Electronic apparatus having improved diagnostic interface Electronic apparatus, such as a personal computer, is described comprising main operative functionality and a power provisioning system for powering the apparatus from an external power source, the power provisioning system comprising:—a main power supply output f... | 04/08/2008 |
| 7343615 | Television proximity sensor Systems and methods for determining whether a television is on and in near proximity are provided. An example system includes a sensor, an analog-to-digital converter, and a digital signal processor. The digital signal processor processes a set of digital audio samp... | 03/11/2008 |
| 7334735 | Card for interaction with a computer A smart card comprising: a memory for storing information; at least one transmitting or receiving antenna; and a low frequency circuit, for handling information associated with said antenna and said memory, which information is modulated at a modulation frequency of... | 02/26/2008 |
| 7336220 | Method and apparatus for equalizing broadband chirped signal In order to generate a signal for canceling a chirped signal, a transmitter generates a cancellation signal along with the transmitted signal, using a single term variable complex gain multiplier adapted to cancel the chirped signal only at its instantaneous frequen... | 02/26/2008 |
| 7333608 | Analog scrambler An analog signal scrambler/de-scrambler includes a receiver for receiving an analog signal and converting the signal into an intermediate frequency signal. A generator generates a pseudo-random gaussian frequency distribution signal, which is multiplied with the int... | 02/19/2008 |
| 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 |
| 7263295 | Transceiver suitable for data communications between wearable computers In a transceiver for inducing electric fields based on data to be transmitted in an electric field propagating medium and carrying out transmission and reception of data by using induced electric fields, having a transmission electrode and a transmission circuit, a ... | 08/28/2007 |
| 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 |
| 7231271 | Steganographic method for covert audio communications Method for embedding a covert message within a digital audio signal. The existence of the covert message is undetectable and the information content of the covert message can be further rendered unascertainable. Covert message data is embedded within a digital audio... | 06/12/2007 |
| 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 |
| 7225163 | Recording/reproducing device and recording/reproducing method A high-speed dubbing unit 10 for dubbing digital data from an optical disk 15 to a hard disk 16 at a high speed is connected via a public telephone line to a payment imposing unit 20. A control unit 13 is provided for generating in... | 05/29/2007 |
| 7209725 | Analog zero if FM decoder and embodiments thereof, such as the family radio service A method and system for directly down-converting FM signals to demodulated baseband information signals that can be used to directly down-convert analog FM signals and digital FM signals to demodulated baseband information signals. In an embodiment, the method inclu... | 04/24/2007 |
| 7183929 | Control of toys and devices by sounds A method of controlling at least one device by incidental sound produced by a living creature and including: attaching a sound-maker to a living creature so that the natural movements of the living creature will cause the sound-maker to emit a sound; receiving the s... | 02/27/2007 |
| 7174151 | Ensuring EAS performance in audio signal encoding An encoding system for encoding a first ancillary code in media data and monitoring for reception of a second ancillary code that has a higher priority than the first ancillary code, such that upon detection of the higher priority ancillary code the encoding system ... | 02/06/2007 |
| 7159117 | Electronic watermark data insertion apparatus and electronic watermark data detection apparatus An electronic watermark data insertion apparatus comprises an insertion information memory (39) for preliminarily storing insertion information for designating electronic watermark data to be inserted block by block and an electronic watermark data insertion ... | 01/02/2007 |
| 7149592 | Linking internet documents with compressed audio files A method for embedding a non-audio file into a compressed audio file is disclosed. The disclosed method is capable of decoding and constructing previously encoded audio files with embedded non-audio information. The method of the present invention also includes step... | 12/12/2006 |
| 7145991 | Superposition of data over voice Method and apparatus for transmitting messages between communication devices via a communication channel allowing at least voice messages to be transmitted, the messages including data subdivided in a sequence of basic data units, the method including: a) encoding t... | 12/05/2006 |
| 7100181 | Television proximity sensor Systems and methods for determining whether a television is on and in as near proximity are provided. An example system includes a sensor, an analog-to-digital converter, and a digital signal processor. The digital signal processor processes a set of digital audio s... | 08/29/2006 |
| 7076659 | Enhanced method for digital data hiding A method is provided for enhanced spread spectrum watermarking. The improved watermarking method includes: receiving host data which is expressed in a transform domain by a plurality of host transform parameters; reducing variance between the plurality of host trans... | 07/11/2006 |
| 7050603 | Watermark encoded video, and related methods Watermarks in video signals or the accompanying audio track are used to associate video objects in a video sequence with object specific actions or information. A video object refers to a spatial and temporal portion of a video signal that depicts a recognizable obj... | 05/23/2006 |
| 7046808 | Method and apparatus for detecting processing stages applied to a signal A system for determining the amount of processing that has been applied to watermarked signal. A steganographic signal is provided that includes an original signal and an embedded fragile watermark. The fragile watermark is characterized by a low energy and a high r... | 05/16/2006 |
| 7039181 | Consolidated voice activity detection and noise estimation Methods and apparatus compensating for background noise associated with a transmitted signal. In a first embodiment, an adder combines an echo estimate with the the transmitted signal to form a processed signal, a noise reduction circuit uses a background noise esti... | 05/02/2006 |
| 7024175 | System for masking microphonic voice signals in wired telecommunications equipment 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 to the line, thereby masking microphonic audio signals, and a... | 04/04/2006 |
| 7024018 | Watermark position modulation Methods and apparatus are provided for embedding information in a host signal based on the positioning of watermarks within the host signal. An embedder provides (i.e. embeds) a plurality of watermarks in the host signal. A processor associated with the embedder is ... | 04/04/2006 |
| 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 |
| 7003118 | High performance IPSEC hardware accelerator for packet classification 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 modifying the scanned packet with an output from the IPSEC securi... | 02/21/2006 |
| 6996237 | Apparatus and methods for including codes in audio signals 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 frequency component to human hearing are evaluated and based o... | 02/07/2006 |
| 6968564 | Multi-band spectral audio encoding An encoder includes a sampler that samples an audio signal and that generates from the samples a plurality of short blocks of sampled audio. Each of the short blocks has a duration less than a minimum audibly perceivable signal delay. A processor combines the plural... | 11/22/2005 |
| 6963998 | Electronic apparatus having improved diagnostic interface Electronic apparatus, such as a personal computer, is described comprising main operative functionality and a power provisioning system for powering the apparatus from an external power source, the power provisioning system comprising:—a main power supply output f... | 11/08/2005 |
| 6961431 | Analog privacy scrambler and scrambling method A system and method for maintaining privacy in transmission of a high bandwidth analog signal. A preferred system and method breaks an input signal into bands and then uses Walsh codes to overlay many signals on top of each other with a set of phase modulators to es... | 11/01/2005 |
| 6943725 | Access control system with limited evaluation of code and distance information An access control system for an object, particularly a motor vehicle, comprises at least one base station with a transceiver device that transmits a wideband modulated interrogation signal, at least one transponder that has a modulation device, in order to modulate ... | 09/13/2005 |
| 6879703 | Method and apparatus for watermarking images Digital watermarks are embedded in image data (102)in order to enable authentication of the image data and/or replacement of rejected portions of the image data. Authentication codes are derived by comparing selected discrete cosine transform (DCT) (104 | 04/12/2005 |
| 6862355 | Message reconstruction from partial detection A method and system for reliably detecting encoded messages included in audio media data in varying acoustic environments, where only a portion of the predetermined message may have been received or detected. ... | 03/01/2005 |
| 6430291 | Method and device for controlling information signal recording An anti-duplication control signal detection section detects an anti-duplication control signal added on a video signal S1 and supplies it to a system controller as a duplication prevention control information S2. A write control section of the system con... | 08/06/2002 |
| 6421445 | Apparatus and methods for including codes in audio signals 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 frequency component to human hearing are evaluated ... | 07/16/2002 |
| 6330335 | Audio steganography 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 signal can thereby be identified, or some machine re... | 12/11/2001 |
| 6175627 | Apparatus and method for embedding and extracting information in analog signals using distributed signal features 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... | 01/16/2001 |
