Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 7352863 | Copy protection for video signal using narrowed horizontal synchronization signals and amplitude modulation Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on a illegal copy. The enhancement in one version include a negative going waveform that appears to the television receiver or videotape recorder to be a ... | 04/01/2008 |
| 7184097 | On-screen display apparatus The present invention provides an on-screen display apparatus which can eliminate variations in the DC level at a time when an input chroma signal and an OSD chroma signal are switched, and prevent an erroneous display of color. The on-screen display apparatus of th... | 02/27/2007 |
| 6934466 | Buzz reduction circuit and TV/VCR combo using the same Buzz reduction circuit for eliminating a vertical period buzz without being influenced by amplifier circuits in an audio signal line. A video signal of a VCR video head is input to a vertical synchronizing signal separating circuit to separate a vertical synchronizi... | 08/23/2005 |
| 6404974 | Method and apparatus for treating a video signal A method of treating a video signal to allow playing on a video cassette recorder (VCR) but not to allow copying using a VCR having an automatic gain control (AGC) when recording. The method involves inserting one or more pulses (22) into the back porch (... | 06/11/2002 |
| 6219485 | Method and apparatus for automatically adjusting the amplitude of a color burst signal A novel method effectively adjusts the amplitude of a color burst signal in a chrominance of a composite video signal read by a reproducing head from a magnetic tape. A low pass filtered chrominance signal of 629 KHz obtained from the composite video sign... | 04/17/2001 |
| 6172713 | Color television system determination circuit A color system determination circuit for use with an input video signal having a frequency component is disclosed. The circuit includes a color trap filter for attenuating the frequency component in the input video signal with the color trap filter provid... | 01/09/2001 |
| 5761370 | Dual-deck videocassette recorder A dual-deck VCR includes a delaying portion for delaying a color signal of 629 KHz reproduced from one deck by a horizontal scanning period, a color comb filter for removing crosstalk from the delayed color signal and a not-delayed color signal, a burst l... | 06/02/1998 |
| 5655047 | Video signal frequency modulator having automatic control function and controlling method therefor A video signal frequency modulator having an automatic control function includes a reference generator for generating a sync tip level signal and a white peak level signal, a first switch for selecting one of the sync tip level signal, white peak level si... | 08/05/1997 |
| 5596418 | Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filterin... | 01/21/1997 |
| 5412482 | Signal line changeover circuit with emitter followers A signal line changeover circuit includes a first signal processing block having a first emitter follower for outputting a signal, a second signal processing block having a second emitter follower for outputting a signal, and a switch block having a first... | 05/02/1995 |
| 5260843 | Magnetic recording and reproducing apparatus with individual correction of amplitude variations of recording currents supplied to plural rotary magnetic heads In a magnetic recording and reproducing apparatus, amplitude errors of recording currents respectively supplied to a plurality of rotary magnetic heads are detected, and, in individual periods of sequential scanning of a magnetic recording medium by the p... | 11/09/1993 |
| 5225913 | Magnetic recorder and regenerator A magnetic recorder and regenerator has a luminate signal input terminal for receiving a luminance signal, a line-sequential signal input terminal for receiving a line sequential signal consisting of alternately line-sequenced color differential signals h... | 07/06/1993 |
| 5214718 | Scan-in polygonal extraction of video images A video image is extracted and stored as a geometric figure by generating a binary pixel map of the image. The binary pixel map contains one bit for each pixel in the image, representative of the value of a characteristic feature of that pixel relative to... | 05/25/1993 |
| 5194964 | Apparatus for processing color or black and white video signals A video-signal output apparatus according to the present invention is an apparatus for outputting a black-and-white video signal. The video-signal output apparatus is arranged to generate a black-and-white video signal, add a burst signal to the black-and... | 03/16/1993 |
| 5097345 | Magnetic video recording apparatus A magnetic video recording apparatus applicable to a video tape recorder or the like is designed integrally with a television camera. The apparatus has a video signal output unit for outputting first video signals, and a video signal recording unit for re... | 03/17/1992 |
| 5029012 | Magnetic recorder and regenerator A magnetic recorder and regenerator has a luminate signal input terminal for receiving a luminance signal, a line-sequential signal input terminal for receiving a line sequential signal consisting of alternately line-sequenced color differential signals h... | 07/02/1991 |
| 4754323 | Color image pickup device in which the level of a sequential color-difference signal is controlled on the basis of the level of the luminance signal A color image pickup device suppresses false color signals in order to provide true color reproduction. That is, the device incrementally or continuously reduces false color signals. More particularly, this device includes a color separation filter throug... | 06/28/1988 |
| 4723175 | Video signal reproducing apparatus for reproducing recorded video signal from a magnetic recording medium A video signal reproducing apparatus for reproducing a recorded video signal from a magnetic recording medium comprises a reproducing circuit for reproducing a recorded frequency division multiplexed signal of an angle modulated luminance signal and a fre... | 02/02/1988 |
| 4713700 | A recording circuit having means to automatically set the recording current of a magnetic recording head In a magnetic recording circuit with a bias current circuit adapted to superimpose a bias current from a bias oscillator on a recording signal and to supply a resultant signal to a magnetic head, there is provided a resistor for detecting the bias current... | 12/15/1987 |
| 4700239 | Differential gain and differential phase compensator circuit of a video signal A method for recording a video signal having luminance and chrominance signals by using a plurality of rotary transducing heads on a recording tape moved longitudinally by a drive mechanism, in which the time axis of the video signal is extended as long a... | 10/13/1987 |
| 4691247 | Video signal recording/reproducing apparatus A video signal recording/reproducing apparatus for recording and reproducing a video signal onto and from a recording medium with a magnetic head. In this apparatus, the recording chrominance signal processing block is provided with a circuit for producin... | 09/01/1987 |
| 4673970 | Chrominance signal processing system A chrominance signal processing system includes a variable gain amplifier capable of effecting gain control for amplifying a carrier chrominance signal and an A/D converter for effecting an analog/digital conversion of an output of the variable gain ampli... | 06/16/1987 |
| 4656527 | Magnetic recording and playback apparatus A magnetic recording and playback apparatus capable of simultaneously recording a plurality of information signals on a single magnetic recording medium and, thereby allowing recording a plurality of broadcast programs unattended. A signal to be recorded ... | 04/07/1987 |
| 4628345 | Circuit for analog digital conversion of a color television signal employing variable signal amplification An analog digital conversion is provided for two color difference signals, for example for a recording according to a timeplex method. The color difference signals are adjusted in their amplitude at the input of the analog digital converter such that the ... | 12/09/1986 |
| 4612585 | Chrominance signal recording and reproducing apparatus A chrominance signal recording and reproducing circuit for a video tape recorder in which a frequency-modulated luminance signal and a low-frequency converted chrominance signal are mixed to be recorded and reproduced. A sideband emphasis type dynamic emp... | 09/16/1986 |
| 4573075 | Digital signal coring apparatus with controllable coring threshold level A digital signal processing apparatus includes a digital coring circuit removing samples of digital input signals in a range determined by a digital threshold level signal. The threshold level signal developed by a coring control device is controllable ac... | 02/25/1986 |
| 4549225 | Color video signal processing circuit for performing level control and time axis deviation compensation A reproduced color video signal processing circuit in a rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium which is recorded with a composite color video signal in which a carrier chrominance signal i... | 10/22/1985 |
| 4533961 | Magnetic recording apparatus with level adjusting means for mixed luminance, chrominance, audio and pilot signals In a magnetic recording apparatus for frequency multiplexing and recording a frequency-modulated luminance signal, a chrominance signal, a frequency-modulated audio signal and a pilot signal on a magnetic tape, the signal level of the frequency-modulated ... | 08/06/1985 |
| 4524380 | Chroma signal recording and reproducing circuit A chroma signal recording and reproducing circuit of a magnetic recording and reproducing apparatus having a recording circuit for frequency-modulating a luminance signal of a color video signal, low-frequency converting a chroma signal and frequency-mult... | 06/18/1985 |
| 4485396 | Automatic chroma filter An auto chroma filter averages the value of successive color burst amplitudes on a line-by-line basis over many video frames, by fetching a burst value from memory and loading it into an up/down counter, and also into a D/A converter which provides the ch... | 11/27/1984 |
| 4466022 | Color video signal reproducing apparatus which transforms the recorded signal of one signal format into signals of another format upon reproduction A color video signal reproducing apparatus comprises a reproducing circuit for picking up and reproducing a recorded signal from a recording medium in which a carrier chrominance signal and a color burst signal within a PAL system color video signal are c... | 08/14/1984 |
| 4459613 | Method and apparatus for automatic adjustment with pilot signal of television image processing system A method for automatic control of non-linear image processing of a television signal subjected to degradation upon passage through a quality degrading medium is disclosed. The processing is of the type including at least one of image enhancement, and nois... | 07/10/1984 |
| 4445142 | Method and apparatus for frequency characteristic compensation of television signals reproduced from a tape record with reference to position of synchronizing signals on the tape There is shown a method for correction of rapid periodic frequency characteristic errors in the reproduction of signals with periodic synchronizing signals from magnetic tape as well a circuit arrangement for carrying out the method. For repeated correcti... | 04/24/1984 |
| 4417284 | Gain control circuit for a video tape recorder wherein the chrominance is gain controlled in response to the luminance signal as well as the chrominance signal A detected luminance signal level is superimposed on a control signal of an automatic color control loop mounted in a chrominance signal path of an undercolor video tape recorder for compensating differential gain of the reproduced chrominance signal.... | 11/22/1983 |
| 4400742 | Magnetic recording and reproducing apparatus for color video signals A magnetic recording and reproducing apparatus, for recording and reproducing the color television signal including VIR signal, of the type having a comb filter which is inserted in the chrominance signal system and includes a delay line for causing a del... | 08/23/1983 |
| 4396953 | Color video signal dubbing system for collating the outputs of signal sources A color video signal dubbing system comprises a reproducing apparatus and a recording apparatus. The recorded signal is a multiplexed signal of a frequency-modulated luminance signal obtained as the result that a luminance signal separated from the color ... | 08/02/1983 |
| 4393412 | Automatic chroma level control circuit for compensating both slow and rapid chroma level changes When levels of chrominance signals reproduced from a helical scan video tape recorder are controlled, two types of control signals are generated based on a level of color burst signal of the reproduced chrominance signals. One of the two control signals i... | 07/12/1983 |
| 4384302 | Composite video signal limiter A filter separates a composite video input signal into luminance and chrominance signal components. The luminance signal component is limited to a range of values defined by first and second reference signals. Excursions in either sense of the chrominance... | 05/17/1983 |
| 4370679 | Gain correction system for videodisc player apparatus A video disc player is described for use with a video disc having frequency modulated video information recorded thereon in the form of a plurality of concentric circles or a single spiral. The information track comprises successively positioned light ref... | 01/25/1983 |
| 4356506 | Automatic chrominance control circuit for a color video tape recorder In a color video signal recording and reproducing apparatus of the type in which the color video signal is separated into the luminance signal and the composite carrier color signal; the separated composite carrier color signal is shifted in frequency; an... | 10/26/1982 |
