Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7440035 | Cable extending device Attenuation compensation volume computing means (60, 61, 62, 63, 67, 68, 69, 70) of a signal receiver computes attenuation compensation volume of a video signal (GL, GH) on the basis of attenuation of pulses which are arranged in a digit... | 10/21/2008 |
| 7271851 | Adaptive color transient improvement A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different region... | 09/18/2007 |
| 7047556 | Method and apparatus for equalizing video transmitted over twisted pair cable A apparatus and apparatus for compensating for video insertion loss due to transmission over long twisted pair cable lines is presented. Transmission of video over twisted pair cable is advantageous because of its superior cost advantage over coaxial cable. However,... | 05/16/2006 |
| 7042518 | Digitally controlled variable frequency HF emphasis circuit for use in video displays A sharpness filter processes a video signal that is to be displayed in a windowed environment. The windowed environment may contain windows that for displaying television images derived from video standards such as NTSC, PAL, and SECAM. Displaying windowed televisio... | 05/09/2006 |
| 6970207 | Anti-flicker filtering process and system A process of filtering digital images to reduce image flicker. An anti-flicker filtering is performed after a step of calculating the image and before a step of displaying the image so that the flicker is filtered as soon as the image is created. ... | 11/29/2005 |
| 6963999 | Source coding to provide for robust error recovery during transmission losses A method and system are described for a multiple level shuffling process of a signal that provides for robust error recovery. A signal is defined as multiple levels wherein each level comprises a frame, a plurality of pixels, and a plurality of bits. In one embodime... | 11/08/2005 |
| 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 |
| 6947098 | Video signal processing A control signal (k_lum) derived from the luminance component (Y) of a video signal is used to adaptively control a temporal noise reduction filter (10) according to the level of motion in a video image. To compress the control signal for storage in a memory ... | 09/20/2005 |
| 6909472 | Conversion of a video signal for driving a liquid crystal display Method and apparatus for the conversion or generation of a video signal intended to be displayed on an image display with different luminance response times for rise and fall. The conversion or generation of the video signal is so that motion artefacts which are cau... | 06/21/2005 |
| 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 |
| 6665021 | System and process for filtering single tone signals A signal processing system and process for digitally filtering a single tone digital signal is disclosed. The system includes a single tone signal generator, which may or may not perform frequency modulation. The single tone signal generator receives an i... | 12/16/2003 |
| 6400415 | System and method for predistorting signals to be amplified A system and method for predistorting a signal which is to be amplified by a non-linear amplifier. The system and method uses additional predistortion circuits to eliminate the predistortion caused by amplifier input circuits and amplifier output circuits... | 06/04/2002 |
| 6377629 | Twisted pair communications line system A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color signals as a function of the delay provided by particular twist... | 04/23/2002 |
| 6320622 | De-emphasis filter with integrated determination of achromatic values A digital de-emphasis filter for a SECAM decoder for converting a sequence of input image data into filtered image data includes at least one recursion register for storing an auxiliary value that is obtained using an input image data value. An arithmetic... | 11/20/2001 |
| 6298085 | Source encoding using shuffling of data to provide robust error recovery in a burst error-environment A system and method for source coding a signal to localize transmission errors to a set of samples is disclosed. The signal comprises a plurality of signal elements (SEs) with each SE having a plurality of components. The signal is divided into a pluralit... | 10/02/2001 |
| 5929942 | Computer system and computer implemented process for editing video fields A computer implemented method for editing a video frame is disclosed. The video frame comprises scan lines of a first video field interlaced with scan lines of a second video field, and the scan lines comprise a plurality of pixels, each having values rep... | 07/27/1999 |
| 5926509 | Twisted pair communicatons line system A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color signals as a function of the delay provided by particular twist... | 07/20/1999 |
| 5757436 | Image processor system An image-processor system for compensating for accumulated phase-and-gain errors incurred during transmission of a video signal over a communications channel. The image-processor system comprises an initial-video processor, an input-video processor, a fea... | 05/26/1998 |
| 5671066 | Apparatus for recording and reproducing video signals with preemphasis and deemphasis processes A video signal recording and reproducing apparatus comprises a magnetic tape (4) into which video signals are recorded. A preemphasis circuit (35) modifies the video signals prior to the recording into the magnetic tape (4), so as to increase magnitude of... | 09/23/1997 |
| 5629742 | Compatible non linear pre-emphasis for composite video signals When a video signal including a component modulated onto a subcarrier (such as a PAL signal) is subjected to a non-linear pre-emphasis known for MAC signals, with the object of reducing the effects of noise encountered in transmitting the composite signal... | 05/13/1997 |
| 5598225 | Method and apparatus for improving transmitted video signal structure A video processor, having an input and an output, for compensating for accumulated phase and amplitude errors encountered during transmission of a video signal over a communications channel. The video processor includes a high-pass filter and amplifier, c... | 01/28/1997 |
| 5572249 | Method and apparatus for optimal NTSC rejection filtering and transmitter and receiver comprising same The invention comprises an optimal causal, monic (first coefficient of filter is 1) NTSC rejection filter for use at an ATV receiver which is designed to optimally process the interference caused by an NTSC co-channel signal while keeping the noise enhanc... | 11/05/1996 |
| 5563915 | Data deinterleaver in a digital television signal decoding system A television signal receiving system includes a deinterleaving network (18) containing first and second deinterleaving functions associated with respective memory address controllers (20, 25). One or the other of the deinterleaving functions is selected f... | 10/08/1996 |
| 5535246 | Method of video noise reduction using non-linear pre/de-emphasis A method of pre-emphasising a signal comprises the steps of a) receiving the signal as an input; b) applying the input signal to a processing system comprising a pair of parallel signal processing paths each comprising a non-linear phase filter and a non-... | 07/09/1996 |
| 5533049 | Method, digital signal processing module and system for efficiently selecting a pre-emphasis filter during line probing The present invention provides a pre-emphasis selection method, digital signal processing module and digital communication system that use computations based on channel spectrum measurements for efficient, non-complex determination of a pre-emphasis filte... | 07/02/1996 |
| 5526136 | Method and apparatus for reproducing a video signal subject to pre-emphasis An image is stably reproduced in a special reproduction mode of still, frame advance or slow motion mode without residual image and/or blur. A video signal reproducing apparatus operates to alternately repeat the steps of interrupting a de-emphasizing pro... | 06/11/1996 |
| 5517322 | Apparatus for recording and reproducing video signals with preemphasis and deemphasis processes A video signal recording and reproducing apparatus comprises a magnetic tape (4) into which video signals are recorded, A preemphasis circuit (35) modifies the video signals prior to the recording into the magnetic tape (4), so as to increase magnitude of... | 05/14/1996 |
| 5493341 | Digital non-linear pre-emphasis/de-emphasis apparatus for video signals in a video signal recording and reproducing apparatus A digital non-linear pre-emphasis/de-emphasis apparatus includes a first filter for multiplying an input signal by a first coefficient varying non-linearly according to the amplitude of the input signal, to thereby change the gain of the input signal, and... | 02/20/1996 |
| 5438369 | Digital data interleaving system with improved error correctability for vertically correlated interference A digital data transmission system for signals in the areas of interference having a high degree of vertical correlation comprises a transmission frame including a plurality of vertically arranged repetitive horizontal data segments each including a fixed... | 08/01/1995 |
| 5432562 | Television signal reception In a television signal receiver, including an intermediate frequency (IF) filter (3) having an intermediate frequency filter group delay, and an intermediate frequency (IF) demodulator (5) coupled to the intermediate frequency filter (3), a correction fil... | 07/11/1995 |
| 5313298 | Video companding method and system A companding technique takes advantage of spatial masking in order to avoid problems from noise and/or distortion introduced when storing or transmitting video signals. A forward companding or encoding part of the technique divides a video frame into sepa... | 05/17/1994 |
| 5276403 | Nonlinear preemphasis-deemphasis system A nonlinear preemphasis-deemphasis system of simplified circuit configuration formed of nonlinear preemphasis and deemphasis circuits. The preemphasis circuit comprises a nonlinear signal increase circuit for increasing the amplitude of an input signal co... | 01/04/1994 |
| 5225910 | Adaptive operation type low noise television system A cooperative adaptive low noise television system provides that, prior to transmission, the composite video is separated into chroma and luminance components. The luminance signal is adaptively pre-emphasized, with the amount of pre-emphasis being determ... | 07/06/1993 |
| 5208707 | Circuit for maintaining compatibility between different image systems during reproduction having an adaptive de-emphasis unit Disclosed is a circuit for maintaining compatibility between different image signal recording/reproducing systems. An adaptive de-emphasis unit is attached to the output of the folding frequency information detector of an improved circuit for maintaining ... | 05/04/1993 |
| 5187590 | Luminance signal recording circuit and method for maintaining compatibility in reproducing between different video systems An improved adaptive folding circuit for a video signal recording/reproducing system. The improved adaptive folding circuit has an adaptive emphasis circuit and an adaptive deemphasis circuit for receiving a luminance signal. The adaptive emphasis circuit... | 02/16/1993 |
| 5144435 | Noise immunity in N signals An arrangement for a television receiver to attenuate correlated noise injected by the transmission medium. Recognizing that there is substantial line to line correlation of the transmission noise injected by interfering television stations, this arrangem... | 09/01/1992 |
| 5144434 | Video signal processing device using look-up table A video signal processing device is arranged to supply a digital video signal to an infinite impulse response digital filter, to supply the digital video signal from the filter to a look-up table circuit which has a non-linear input-output characteristic,... | 09/01/1992 |
| 5136381 | TV signal transmission systems and methods A hybrid television signal of less transmission power or better signal to noise performance is made up by removing low frequency analog components from the video signal, digitizing them and sending them as data in non-active video portions of the transmit... | 08/04/1992 |
| 5126846 | Non-linear amplifier and non-linear emphasis/deemphasis circuit using the same A non-linear amplifier circuit comprises a low band eliminating filter for receiving an input signal from an input terminal, a logarithmic amplifier and an adder for adding the output signal of this logarithmic amplifier and the input signal with a predet... | 06/30/1992 |
| 5097336 | Signal processing apparatus A signal processing apparatus of this invention is an apparatus arranged to amplify a predetermined frequency component of an input signal on the basis of a predetermined amplification characteristic and then to output an amplified signal. This apparatus ... | 03/17/1992 |
