Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7962012 | Recording medium, reproduction apparatus, recording method, program and reproduction method A BD-ROM has recorded therein an AV Clip generated by multiplexing a video stream and a graphics stream. The graphics stream represents an interactive display to be overlayed with the video stream, and includes a sequence of three Button State groups. The interactiv... | 06/14/2011 |
| 7333153 | Expanded information capacity for existing communication transmission systems A system for transmitting digital programming includes a program source providing digital information, circuitry for modulating the digital information onto a visual carrier modulated with analog television programming, and a visual transmitter coupled to the modula... | 02/19/2008 |
| 7333113 | Mobile motion capture cameras A system for capturing motion comprises: a motion capture volume configured to include at least one moving object having markers defining a plurality of points on the at least one moving object; at least one mobile motion capture camera, the at least one mobile moti... | 02/19/2008 |
| 7251577 | Realtime power mask trigger A realtime power mask trigger generator for an instrument that acquires data in response to a trigger signal integrates power amplitudes over a defined bandwidth within a frequency spectrum for an input signal to produce an average signal power, and compares the ave... | 07/31/2007 |
| 7242730 | Mirror suppression circuit and receiver using such circuit A mirror suppression circuit includes a first quadrature signal path coupled between quadrature signal input and output terminals and an error correction circuit for correction of amplitude and phase errors in a carrier modulated quadrature signal. To obtain a suppr... | 07/10/2007 |
| 7171444 | Remote desktop protocol compression system Embodiments of the present invention are directed to a remote desktop communication protocol that includes spatial and temporal compression techniques. Multimedia presentation data is generated at a server from a source. A compression facility modifies the presentat... | 01/30/2007 |
| 7136503 | Encoding hidden data A digital image is processed to hide information, by generally inconspicuous adjustments thereof. These adjustments can define a pattern that extends across some or all of the image. Desirably, the pattern is adapted to the particular image being encoded, so as to b... | 11/14/2006 |
| 7068812 | Decoding hidden data from imagery A digital image in which hidden information has been encoded, is processed to discern the hidden information. This processing can include identifying geometric distortions of the image (e.g., cropping, scaling, rotation), and compensating for such identified distort... | 06/27/2006 |
| 7003132 | Embedding hidden auxiliary code signals in media Methods for embedding and reading auxiliary messages from image signals use embedded code signals modulated with the auxiliary message. These embedded ode signals may be used to convey hidden tracking codes in images, video and printed objects. The embedded code sig... | 02/21/2006 |
| 6999535 | Apparatus, and associated method, for recovering a desired component of a receive signal received at a radio device Apparatus, and an associated method, facilitates recovery of the informational content of a desired component portion of a receive signal received at a radio device. Non-desired component portions of the receive signal, such as interfering components formed as a res... | 02/14/2006 |
| 6970940 | System and method for distributing a single multicast multi-program audio stream over a network A system and method for distributing multi-program audio over a network includes the use of a Local Area Network, Wide Area Network, an Intranet and the Internet. The system includes a network audio source, a network distribution system and end devices. The method, ... | 11/29/2005 |
| 6967694 | Demodulator for demodulating digital broadcast signals To present a digital broadcast demodulator, in a demodulator of digital terrestrial wave broadcast for transmitting coded digital video and audio information in a packet form, capable of detecting packet synchronism stably and precisely, controlling the AGC, and pro... | 11/22/2005 |
| 6958781 | Mapping arrangement for digital communication system A receiver receives a digital signal. The digital signal contains a frame of robust VSB data and ATSC data, and the digital signal further contains a map. The map contains information indicating a location of the robust VSB data and ATSC data in the frame. A decoder... | 10/25/2005 |
| 6959386 | Hiding encrypted messages in information carriers 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 responsive ac... | 10/25/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6922480 | Methods for encoding security documents Line art on a banknote or other security document is slightly changed to effect the encoding of plural-bit digital data (i.e. the banknote is digitally watermarked). When such a banknote is thereafter scanned, the resulting image data can be recognized as correspond... | 07/26/2005 |
| 6415059 | Data compression Data compression apparatus in which input data is compressed according to a target output data quantity using a stage of data quantization, the apparatus comprises: one or more trial quantizers for selecting a degree of quantization so that the target out... | 07/02/2002 |
| 6256070 | Concurrent discrete time oscillators (DTO) for video and closed caption encoding A video encoding system combines the processing of image data and closed caption data in the formation of a raster television signal. By combining the processing of image data and closed caption data, a single discrete time oscillator (DTO) can be used to... | 07/03/2001 |
| 6252631 | Apparatus and method for encoding high quality digital data in video Apparatus for encoding a continuous (i.e. QAM) signal into a (non-continuous) video signal is achieved in a manner to obviate noise problems normally introduced by breaks in the (video) signal due to horizontal and vertical pulses, low fidelity circuits, ... | 06/26/2001 |
| 6211919 | Transparent embedment of data in a video signal A method and apparatus for transparently embedding data into a video signal modulates a particular carrier frequency with a randomized pattern representing the data. The randomized pattern may be a combination of the data with the output from a pseudo-ran... | 04/03/2001 |
| 6160543 | Transmission device for computer video signals A transmission device for computer video signals. Computer video signals can be inputted into the transmission device for processing and to be transmitted by only three pairs of transmission line (Category 5 UTP) to a remote terminal, while still maintain... | 12/12/2000 |
| 6105032 | Method for improved bit scan by locating a set bit within a nonzero data entity A method for improving the execution of significant bit scans on a data entity in a computer system is provided. The data entity is examined in a number of iterations equal to the base two logarithm of the size of the data entity in bits, N. Initially, ha... | 08/15/2000 |
| 5946048 | Network device for handling digital data over a TV channel A network terminal device utilizes a unique modulation scheme that enables the transmission of digital data over a wireless, cable or direct broadcast satellite TV channel without disturbing quality of television signals. A digital data stream of the netw... | 08/31/1999 |
| 5929920 | System and method for encoding digital information in a television signal Digital information is encoded in the video portion of a television signal such that "n" (n is an integer) bits of the digital information are carried by each successive frame in a group of frames. The digital information is encoded by modulating a carrie... | 07/27/1999 |
| 5875005 | Method for generating a modulated television signal The method for generating a modulated television signal involves performing a first filtering and a second filtering to obtain two signals, one having a passband that is equal to complete passband and the other one having a passband that is equal to the s... | 02/23/1999 |
| 5663766 | Digital data encoding in video signals using data modulated carrier signals at non-peaks in video spectra Digital information is encoded in the video portion of a television signal such that "n" (n is an integer) bits of the digital information are carried by each successive frame in a group of frames. The digital information is encoded by modulating a carrie... | 09/02/1997 |
| 5659372 | Digital TV detector responding to final-IF signal with vestigial sideband below full sideband in frequency A tuner selects one of channels at different locations in a frequency band used for transmitting VSB HDTV signals including symbol codes descriptive of digital signals. The tuner also includes mixers for performing plural conversion of the selected channe... | 08/19/1997 |
| 5646698 | Pre-frame-comb as well as "pre-line-comb" partial-response filtering of BPSK buried in a TV signal BPSK modulation of suppressed carrier in quadrature with a video carrier amplitude-modulated by composite video signal is used for transmitting a serial-bit digital signal, which is subjected both to "pre-line-comb" and "pre-frame-comb" partial-response f... | 07/08/1997 |
| 5565930 | Receiver with oversampling analog-to-digital conversion for digital signals accompanied by analog TV signals Digital signal receivers for detecting BPSK modulation of a suppressed carrier transmitted through the same channel as an analog television signal are described, in which the detected BPSK is digitized with an oversampling analog-to-digital converter prio... | 10/15/1996 |
| 5563664 | Pre-frame-comb as well as pre-line-comb partial-response filtering of BPSK buried in a TV signal BPSK modulation of suppressed carrier in quadrature with a video carrier amplitude-modulated by composite video signal is used for transmitting a serial-bit digital signal, which is subjected both to "pre-line-comb" and "pre-frame-comb" partial-response f... | 10/08/1996 |
| 5534933 | Apparatus for processing NTSC TV signals having digital signals on quadrature-phase video carrier A vestigial-sideband amplitude-modulation transmitter using a balanced modulator for generating a suppressed carrier that is in quadrature phasing with the video carrier of a television signal receives as modulating signal a binary phase-shift-keying (BPS... | 07/09/1996 |
| 5526062 | Color TV receiver using quadrature-phase synchronous detector for supplying signal to chrominance circuitry In a television system including a source of an intermediate frequency (IF) signal, which signal includes an IF picture carrier amplitude modulated with video information, synchronous demodulator means responds to the IF signal, for providing an in-phase ... | 06/11/1996 |
| 5508748 | Data level selection for multilevel VSB transmission system A system for determining the data bits represented by the received symbols of one or more data constellations includes converting the received symbols into multi-bit values (preferably in two's complement form), selecting a number of the most significant ... | 04/16/1996 |
| 5497205 | Apparatus for processing BPSK signal transmitted with NTSC TV on quadrature-phase video A vestigial-sideband amplitude-modulation transmitter using a balanced modulator for generating a suppressed carrier that is in quadrature phasing with the video carrier of a television signal receives as modulating signal a binary phase-shift-keying (BPS... | 03/05/1996 |
| 5461426 | Apparatus for processing modified NTSC television signals, with digital signals buried therewithin A relatively low power phase-shift-keyed (PSK) subcarrier encoding digital information is admixed with composite video signal. The PSK subcarrier is at an odd multiple of half the scan line frequency of the composite video signal, and the symbol rate is a... | 10/24/1995 |
| 5448299 | Apparatus for processing BPSK signals transmitted with NTSC TV on quadrature-phase video carrier A vestigial-sideband amplitude-modulation transmitter using a balanced modulator for generating a suppressed carrier that is in quadrature phasing with the video carrier of a television signal receives as modulating signal a binary phase-shift-keying (BPS... | 09/05/1995 |
| 5430487 | Method and apparatus for improving temporal video signal processing using motion vectors transmitted with the video signal A system for improving motion-sensitive processing in a television receiver generates motion vectors for video images in a studio environment, encodes the motion vectors and then combines the encoded motion vectors with the video signal for transmission. ... | 07/04/1995 |
| 5315619 | Carrier recovery processor for a QAM television signal A television receiver responds to a quadrature amplitude modulated (QAM) signal containing symbols mapped into a four quadrant grid-like constellation defined by I and Q axes. Demodulated I and Q components are processed by a carrier recovery network whic... | 05/24/1994 |
| 5278637 | Apparatus and a method for quadrature-phase encoding and transmitting a digital signal in a video signal A system for encoding digital data into a video signal first encodes the digital data into in-phase and quadrature-phase component signals, using a 16 quadrature amplitude modulation (16 QAM) technique. The in-phase and quadrature-phase signals are then u... | 01/11/1994 |
| 5229847 | Television signal processing system including modulated auxiliary carrier In one embodiment an encoded compatible widescreen television signal includes first and second auxiliary carriers amplitude modulated with side panel chrominance information. The first and second auxiliary carriers exhibit a significant phase shift (e.g.,... | 07/20/1993 |
