Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7352373 | Systems and methods for multi-dimensional dither structure creation and application Embodiments of the present invention comprise systems and methods for creation, modification and implementation of dither pattern structures. ... | 04/01/2008 |
| 7292660 | Delta-phase detection method and system A delta-phase detection method for real-time identifying a burst sequence in a received signal. The delta-phase detection method calculates phase differences between every two consecutive samples of the received signal, and counts the number of successive phase diff... | 11/06/2007 |
| 7224305 | Analog-to-digital modulation A supplied analog signal is modulated by comparing the supplied analog signal with a noise signal. As a result of each comparison, an output signal is generated having a first value if the supplied analog signal is greater than the noise signal and generating an out... | 05/29/2007 |
| 7221299 | Method and apparatus for an ADC circuit with wider input signal swing An analog-to-digital converter (ADC) system that converts an analog input signal into a digital output circuit uses a method of shaping a pseudo-random signal such that the ADC system can be used with input signals having wider swings. The ADC system also includes a... | 05/22/2007 |
| 7161634 | Encoding system for error diffusion dithering An error diffusion system in accordance with an embodiment of the present invention adjusts the color depth of an RGB signal using error diffusion without the using an expensive frame buffer. Specifically, a color depth adjustment unit in accordance with the present... | 01/09/2007 |
| 7148931 | Apparatus and method for signal processing in digital video system An apparatus and a method for signal processing in a digital video system. The apparatus for signal processing of a digital video system has: an input unit to receive a signal quantized for M bits; and an output unit to output a value of A for (2M−N−B... | 12/12/2006 |
| 7075466 | System and method for improving performance of an analog to digital converter The present invention provides an ADC apparatus and method for improving effective bit resolution and suppressing digital reconstruction artifacts with an anti-aliasing filter and an over-sampled input. ADC resolution can be increased by combining a dither signal wi... | 07/11/2006 |
| 7038702 | Display device and driving circuit for displaying A frame memory 105 stores the original image data received from a higher-level device 102 via an interface 103. Color reduction processing means receives color reduction rate data through a transfer from an upper-level device 102 or manua... | 05/02/2006 |
| 6995802 | Image binarization method and binary image creation method An image binarization method having highest fidelity for multi-digitized luminance data, and a binary image creation method by which images can be obtained in real-time without post-processing. Thresholds in binarization are not fixed, but set in accordance with cha... | 02/07/2006 |
| 6980206 | Rendering a three-dimensional model using a dither pattern Rendering a three-dimensional model includes obtaining a characteristic of the three-dimensional model, determining a three-dimensional dither pattern based on the characteristic, and rendering the three-dimensional model using the three-dimensional dither pattern. ... | 12/27/2005 |
| 6950048 | Dither system for a quantizing device A dither system for a quantizing device, such as a multi-stage pipelined analog-to-digital converter (ADC), derives a dither signal from a clock signal having a sample frequency, the dither signal having a frequency that is one-third of the sample frequency. The dit... | 09/27/2005 |
| 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 |
| 6724437 | Method and device for adding noise to a video signal for improving a display of the video signal In a display driving method, noise is added (NG, AD) to a video signal before the video signal is subjected to a dithering operation (DC). The invention is preferably applied to render non-moving dither patterns invisible in a plasma display panel driving method in ... | 04/20/2004 |
| 6490005 | Video analog-to-digital converter An analog-to-digital converter (ADC) (112) for sampling high speed video signals includes Pre-amplifiers (502, 504, 506) electrically coupled to Post-amplifiers (508, 510, 512) that are electrically coupled to output latches (514, 517, 519, 521, 523, 525,... | 12/03/2002 |
| 6486926 | Adaptable raster distortion correction system for multiple horizontal scanning frequencies A memory and a switchable digital filter supply different numbers of digital distortion correction values. The supplied distortion correction values are converted to an analog distortion correction signal. A passive, analog low pass filter for the analog ... | 11/26/2002 |
| 6473525 | Method for detecting an image edge within a dithered image A method for detecting an image edge within a dithered image. A pixel within a support region is selected for processing. The differences between pixel values in the region and the selected pixel are computed to form a current difference map. Whether the ... | 10/29/2002 |
| 6397276 | Data transmission by an alternating-frequency analog signal The present invention provides for the compression of digital and analog data for storage and transmission. Analog data in the form of an analog signal is converted into a digital signal by an analog-to-digital converter. The digital signal is then conver... | 05/28/2002 |
| 6147671 | Temporally dissolved dithering A set different dither matrices is employed in a repetitive manner to accomplish elimination of contouring while at the same time not adding typical "dither graininess" to a digital video image. The matrices are specially chosen to result in a time-averag... | 11/14/2000 |
| 6040876 | Low intensity contouring and color shift reduction using dither A method and system for reducing the effects of false contouring and reducing color shading artifacts. An image signal 102 is dithered by the addition of a small noise signal from a noise generator 500. The added noise signal breaks up the edges of homoge... | 03/21/2000 |
| 5982446 | Video modulator arrangement In a single-chip multistandard video modulator arrangement in which audio signals for transmission with video signals are first modulated onto a subcarrier and then combined with the video signals for modulation onto a VHF or UHF main carrier, the modulat... | 11/09/1999 |
| 5940138 | Analog signal process with dither pattern The present invention provides distortion compensating of an analog signal which is quantized by an A/D converter. A dither device processes a clock signal from a clock signal generator to provide an output signal with a known dither pattern. The output s... | 08/17/1999 |
| 5835158 | Analog signal process with dither pattern The present invention provides distortion compensating of an analog signal. A dither device processes a clock signal from a clock signal generator to provide an output signal with a dither pattern. The output signal with the dither pattern has a plurality... | 11/10/1998 |
| 5652624 | Systems for dither-quantizing and reconstruction of digital television signals Recording of the stream of very coarse samples with which a preferred multiphase dither-quantizer sends compressed television permits multiple playback modes for reconstructing an archival TV picture with different tradeoffs between contrast resolution an... | 07/29/1997 |
| 5561714 | Scrambling system for serial digital video An improved scrambler for serial digital video that is compatible with SMPTE Standard 259M inserts a detector/dithering circuit between the input serial digital signal and a scrambler. The scrambler's statistics are observed by a pair of up/down counters.... | 10/01/1996 |
| 5525984 | Optimization of weighted signal-to-noise ratio for a digital video encoder When processing video television information the low frequency band is inherently of primary interest due to the natural averaging properties of the human eye, combined with the limited frequency response of video display elements such as phosphorus and l... | 06/11/1996 |
| 5495346 | Element generator for dither matrix and a dithering apparatus using the same An element generator for a dither matrix comprises a logic device which receives a row address and a column address and performs a logic operation thereon so as to produce a dither element corresponding to the row address and the column address, which is ... | 02/27/1996 |
| 5404176 | Digital color video image enhancement for a random dither circuit The present invention relates to a method of enhancing a digital color video image comprised of separating a source pixel into individual component parts, for each component part, generating a random number having the same length as the corresponding comp... | 04/04/1995 |
| 5351084 | Compressed video bit rate reduction system A system and method for increasing the color or luminance gray scale levels from, for example 16 to 32, without increasing the transmission bit rate to produce sharper images with less band width requirement. An error level or pedestal is added to the ana... | 09/27/1994 |
| 4965668 | Adaptive rounder for video signals An adaptive rounder for avoiding truncation errors for digital video signal has a dither source that is modified by the bits of an integer portion of an input digital signal corresponding to the video signal. A dither signal from the dither source has a n... | 10/23/1990 |
| 4926246 | Dither processing circuit Apparatus for processing a first signal representing a color component of a pixel of an image in which the signal defines the value of the color component as one of a first set of values defining a first scale of color component values. The apparatus comp... | 05/15/1990 |
| 4827343 | Method and apparatus for reducing analog/digital converter requirements in picture-in-picture television circuits In the PIP circuit of a television receiver, the resolution of the analog-to-digital converter is improved by one bit. This is done by adding a dither signal, having an amplitude equal to one-half the least significant bit at the converter output to the a... | 05/02/1989 |
| 4825286 | Digitization of video signals A band limited composite video television signal has summed with it, at a reduced amplitude, a frequency modulated audio carrier signal at a higher frequency. The sum signal is sampled and digitized at a sampling frequency which is at least twice the audi... | 04/25/1989 |
| 4769706 | Digital blanking reproducing circuit A digital blanking reproducing circuit wherein video signals are converted into N (N: positive integer) bit digital signals and then signal-processed. On the basis of plural N bit signals during the blanking interval of the video signal, an M (M: positive... | 09/06/1988 |
| 4758893 | Cinematic dithering for television systems Dither-quantizing with Cinematic Dithers permits coarse quantization of the Nyquist samples transmitting television luminance or chrominance in analog or digital signals. Means are disclosed for generating improved p-phase Cinematic Dithers corresponding ... | 07/19/1988 |
| 4719504 | Method for converting an analog picture signal into an amplitude-discrete output signal In a circuit arrangement for converting an analog picture signal, which corresponds to consecutive fields, into an amplitude-discrete output signal, which, in a comparison stage, compares the picture signal to a plurality of reference values and produces ... | 01/12/1988 |
| 4652905 | Instantaneous neutral colors in dither-quantized color television The chrominance constituent of a color-television picture is transmitted by means of chrominance samples dither-quantized according to a small number of transmittable chrominance values. By use of a look-up table or equivalent analog means, the chrominanc... | 03/24/1987 |
| 4647968 | Analog-to-digital conversion system as for a narrow bandwidth signal processor A narrow bandwidth analog-to-digital conversion (ADC) system is described in the context of the color burst processing and burst phase detecting circuitry of a digital color television receiver. The ADC includes a dither generator which adds a dither sign... | 03/03/1987 |
| 4594726 | Dedithering circuitry in digital TV receiver A 7 bit digital signal is dithered by adding a low-level digital dithering signal comprised of alternating 1's and 0's, and by truncating the product to 6 bits. To dedither, an EXCLUSIVE-OR gate compares the previous and the current values of the least si... | 06/10/1986 |
| 4566028 | Digital signal processing apparatus for processing dithered digital signals In a digital signal processing system, an analog-to-digital converter producing digital representations of an analog signal is dithered to increase its apparent quantizing resolution. Certain processing of the digital signals, however, can result in the l... | 01/21/1986 |
| 4556900 | Scaling device as for quantized B-Y signal A signal processing apparatus includes a scaling device for increasing the magnitude of a signal from a source to better use the dynamic range of processing apparatus, and to reduce the effects of noise and error sources. This is particularly useful in a ... | 12/03/1985 |
