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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.
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| Number | Title | Issue Date |
| 7443920 | Frame-based carrier frequency and phase recovery system and method Header information is used to facilitate coarse frequency and frame recovery. The coarse frequency and frame recovery is thereafter utilized to perform adaptive phase and frequency synchronization on a frame-by-frame basis. A digitized signal representative of a wir... | 10/28/2008 |
| 7436412 | Graphics engine with efficient interpolation A graphics engine includes a setup unit and a rendering unit. The setup unit computes coefficients A, B, and C used for interpolating an attribute v of a triangle to be rendered for a graphics image. The setup unit then derives compressed coefficients Ã, {tilde ove... | 10/14/2008 |
| 7352816 | Data oversampling via clock and data interpolation An oversampling delay is provided between clock and data signals by steering a current between first and second nodes. The first node is coupled to an input differential pair of a clock interpolator and a delayed differential pair of a data interpolator. The second ... | 04/01/2008 |
| 7301971 | Method and apparatus for continuous synchronization of a plurality of asynchronous data sources An apparatus and method for continuous synchronization of a pair of independently clocked asynchronous data streams (100, 101) consisting of raster data from independent imaging acquisition systems comprises a means for acquiring individual rasters from a fir... | 11/27/2007 |
| 7256838 | Video signal processing method for digital video decoder A video signal processing apparatus which is provided for a digital video decoder and can automatically and properly adjust a fluctuation of the number of sampling data of digital composite video signals includes: an adjusting circuit which performs a partial adding... | 08/14/2007 |
| 7254185 | Method for recovering a digital data content in a communication system and apparatus for performing the same A method is directed to recovering a digital data content in a communication system, wherein the digital data content has been converted into an analog signal based on a primary clock, at a transmitter for transmitting to a receiver. The method comprises receiving t... | 08/07/2007 |
| 7250981 | Video signal processor and video signal processing method which interpolate a video signal using an interpolation factor based on phase information of a selected clock A video signal processor and a video signal processing method which can prevent the length of one period of a clock from being shortened and can output a video signal that is in phase with a reference signal. When a video data signal that has been processed using a ... | 07/31/2007 |
| 7199833 | Method of using three-dimensional image interpolation algorithm to achieve frame rate conversions This specification discloses a method that uses three-dimensional image interpolation algorithm implemented in an image player to solve the problem of frame rate conversions between output contents and the image player. It aims to achieve high resolutions and high f... | 04/03/2007 |
| 7170957 | Device and method for the digital demodulation of a signal received by selecting a filter and digital communication receiver comprising same The device (10) for digital demodulation comprises a polyphase filter (14) comprising a set of N distinct elementary digital filters (Hi) and means (16) of selection, for each block of an elementary digital filter (Hi). The... | 01/30/2007 |
| 7161602 | Pixel interpolation method and related pixel interpolation system A pixel interpolation method includes: utilizing a plurality of pixel pairs on two successive scan lines to determine at least one first possible angle; utilizing a plurality of pixel value distribution trends of the two successive scan lines to determine at least o... | 01/09/2007 |
| 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 |
| 6917388 | Video signal processing device for automatically adjusting phase of sampling clocks In a video signal processing device, an input video signal VO representing a test pattern having two gradations of black and white is converted to 8-bit data by an A/D converter 4 in synchronism with sampling clocks generated in a write-in control circuit ... | 07/12/2005 |
| 6856358 | Phase-increase induced backporch decrease (PIBD) phase recovery method for video signal processing A method to generate an optimum phase shifted sampling clock for sampling a synchronized video signal A(t) having a synchronization signal SYNC pulse is achieved. The method comprises, first, generating a sampling clock having a first edge aligned with a trailing ed... | 02/15/2005 |
| 6778170 | Generating high quality images in a display unit without being affected by error conditions in synchronization signals contained in display signals Displaying the images encoded in a display signal which also contains synchronization signals and display enable (DE) signal. The DE signal indicates the time points at which the display data portion of the display signal contains active pixel data elements represen... | 08/17/2004 |
| 6731343 | Method and apparatus for adjusting dot clock signal The present invention provides a technique for appropriately adjusting a dot clock for video signals by a simple process. A process of adjusting a phase of the dot clock first obtains two image data by two dot clocks having different phases, carries out a certain op... | 05/04/2004 |
| 6631216 | Image interpolation apparatus For enabling image enlargement or reduction of high image quality with improved definition, there is disclosed an image interpolating device comprising a memory for storing digital image signal, memory readout means for reading pixel data in succession fr... | 10/07/2003 |
| 6438275 | Method for motion compensated frame rate upsampling based on piecewise affine warping Interpolation of a new frame between a previous frame and a current frame of a video stream by motion compensated frame rate upsampling. The interpolation method includes identifying nodes and edges of objects such as triangles present in the previous fra... | 08/20/2002 |
| 6304296 | Method and apparatus for adjusting dot clock signal The present invention provides a technique for appropriately adjusting a dot clock for video signals by a simple process. A process of adjusting a phase of the dot clock first obtains two image data by two dot clocks having different phases, carries out a... | 10/16/2001 |
| 6128357 | Data receiver having variable rate symbol timing recovery with non-synchronized sampling An adaptable, variable rate symbol timing recovery system for a digital sal receiver comprises an analog to digital (A-D) signal converter having analog signal input and digital data signal output terminals. A source of selectable, substantially fixed ra... | 10/03/2000 |
| 6084539 | Digital to analog converter An analog signal, for example, a video signal is divided into a high frequency signal and a low frequency signal by a high-pass filter and a low-pass filter. A high speed analog-to-digital converter (ADC) converts the high frequency signal to a first digi... | 07/04/2000 |
| 5929923 | Apparatus for producing a video signal in synchronism with an external synchronizing signal An encoder generating an analogue color signal is configured by a digital circuit. An external frame signal supplied from an external apparatus is counted by a clock pulse signal generated by a crystal oscillator, and a synchronizing signal to be added to... | 07/27/1999 |
| 5812608 | Method and circuit arrangement for processing received signal The invention is related to a method and circuit arrangement for processing a received signal in a variable symbol rate system, such as a digital television system. In the method and arrangement according to the system, a received signal is sampled at a f... | 09/22/1998 |
| 5638131 | Method to synchronize video modulation using a constant time base Successive pixels representing video data in successive lines in a raster scan are buffered. Each of the lines has a sync pulse defining the line beginning. A phase adjustment is determined between the sync pulse, preferably at a particular level in the s... | 06/10/1997 |
| 5604541 | High definition television receiver A HDTV receiver which is improved in its overall performance and is simplified in its configuration, by improving a symbol timing restoring circuit, includes a tuner for selecting a necessary channel from input signals via an antenna, an IF processing & c... | 02/18/1997 |
| 5523792 | Composite video sub-pixel timing adjustments using digital resampling Composite video timing adjustments using digital resampling provides precise sub-pixel timing relative to a timing reference with a single video master clock. A digital resampler interpolates an input digital composite video signal as a function of a phas... | 06/04/1996 |
| 5473638 | Digital signal processor delay equalization for use in a paging system A method and apparatus provide an equalization time delay to synchronize a plurality of paging transmitters in a simulcast paging system. A delay equalization circuit (41 ) appropriate for use with an analog input signal includes a coder/decoder (CODEC) (... | 12/05/1995 |
| 5440593 | Combined aligner blender The present invention relates to a method of aligning and blending input digital samples, comprised of delaying the input samples by a clock pulse, to provide delayed data samples, subtracting a smaller fractional part from a larger fractional part of eit... | 08/08/1995 |
| 5404173 | Method to synchronize video modulation using a constant time base Successive pixels representing video data in successive lines in a raster scan are buffered. Each of the lines has a sync pulse defining the line beginning. A phase adjustment is determined between the sync pulse, preferably at a particular level in the s... | 04/04/1995 |
| 5367338 | Method and apparatus for converting the sampling rates of a digital video signal When processing a digital video signal, the problem often arises of converting the signal from a first sampling raster which is asynchronous with respect to the line interval to a second sampling raster which synchronous with the line interval. Interpolat... | 11/22/1994 |
| 5347316 | Image information transmission system having time base variation correcting function An image information transmission system of the kind receiving a transmitted analog image signal and forming digital image data by sampling the received analog image signal is arranged to control the timing of sampling according to the level of data of a ... | 09/13/1994 |
| 4841357 | Data compander for digital video signals A data compander for digital video signals wherein the sampling frequency is locked to the chrominance-subcarrier frequency. The data compander includes the following cascaded subcircuits: a lock-mode-changing filter which changes the lock of the video si... | 06/20/1989 |
| 4712130 | Chrominance signal frequency converter as for a pix-in-pix television receiver A pix-in-pix television signal processing system develops a composite video pix-in-pix signal representing a reduced-size auxiliary image insert in a full-sized main image. The auxiliary video signal is separated into luminance and chrominance components ... | 12/08/1987 |
| 4703340 | Frequency division multiplexed analog to digital converter A digital television receiver, having a line locked clock, includes a first digital phase locked loop which regenerates quadrature phase related subcarrier signals that are used to synchronously demodulate the chrominance signal components of composite vi... | 10/27/1987 |
| 4636836 | Phase locked loop system for providing a phase shifted output signal A phase locked loop system is described in the context of a digital television receiver. The system includes a band-pass filter which shifts the phase of burst samples provided to it by 33°. This phase shift makes the zero-crossing points of the filtered... | 01/13/1987 |
| 4598310 | Circuit arrangement for obtaining a phase-sensitive control quantity, in particular in a color television receiver A circuit arrangement for obtaining a control quantity which is dependent on the phase shift of a color burst signal comprising an amplitude factor with respect to a reference signal, preferably of approximately the same frequency, which is phase-locked t... | 07/01/1986 |
| 4558348 | Digital video signal processing system using asynchronous a-to-d encoding A digital TV receiver having an analog-to-digital converter which generates digital representations of the analog signal asynchronously relative to the color burst reference, includes open loop circuitry for correcting the values of the chrominance compon... | 12/10/1985 |
| 4503453 | Digital method and device for correcting the phase error of a sampled signal as applicable to the correction of television signals At the time of analog-to-digital conversion by sampling of a sine-wave signal having a frequency F by means of a clock signal having a frequency 4nF where n is a whole number, these two signals exhibit a residual phase error .PHI.. The method for correcti... | 03/05/1985 |
