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| Number | Title | Issue Date |
| 7349033 | Systems and methods for correcting color phase error in video systems Systems and methods are provided for correcting color phase error in a video decoder system. A demodulator system demodulates the composite input signal and the at least one delayed signal to produce sets of baseband chroma components based on a phase correction val... | 03/25/2008 |
| 7190407 | System, method and apparatus for sandcastle signal generation in a television signal processing device A system, method and apparatus are provided for generating 98 a sandcastle signal in a television signal receiver 90, and utilizing the sandcastle signal during television signal processing. In one form, the sandcastle signal is generated by subtractin... | 03/13/2007 |
| 7139037 | Circle correction in digital low-pass filter A filter circuit is provided which has a filtered input and an unfiltered input. The filtered input passes through delay elements to coefficient circuitry. The unfiltered input passes to the coefficient circuitry without passing through the delay elements. In this m... | 11/21/2006 |
| 7123652 | Sampled data digital filtering system A digital filtering system for filtering sample data includes a delay network for delaying input sample data to provide multiple delayed sample data outputs. The filtering system also includes a filter network represented by a decomposed coefficient weighting matrix... | 10/17/2006 |
| 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 |
| 6940561 | Automatic modulation and RF carrier level control of sync suppressed television signals The depth of modulation and the absolute RF carrier level of an amplitude-modulated video signal are automatically adjusted. For adjustment of the depth of modulation, a sync tip of the video signal is sampled, corrected and normalized to a reference level, e.g., a ... | 09/06/2005 |
| 5510859 | Tuned signal detector for use with a radio frequency receiver Disclosed is a tuned channel detector which includes a cable path between a radio frequency source and a receiver such as a TV, wherein the radio frequency source passes first through an attenuator and second through a signal selection module comprising t... | 04/23/1996 |
| 5223920 | Video processor having automatic chrominance control compensation A television receiver includes a frequency multiplexed video processor which processes chrominance and luminance signals in response to synchronously detected composite video information. The composite video signal is separated into a plurality of frequen... | 06/29/1993 |
| 5067011 | Method and apparatus for demodulating chrominance signals using a training signal in place of a color burst signal An improved color subcarrier and amplitude reference signal and means for its utilization are provided for color television systems, particularly high definition, wide aspect ratio television systems wherein the high definition signal is decomposed into t... | 11/19/1991 |
| 5010404 | Characteristics corrector A characteristics corrector in a video signal processing system is described for correcting characteristics of the video signal processing system at the time of recording and/or reproducing a video signal. The corrector includes a reference pulse generati... | 04/23/1991 |
| 4970582 | Method and circuit for recovering a logic signal from a band limited signal channel A method and circuit for recovering from a video signal a digital Vertical Interval Time and Control Code (VITC) signal which has been distorted in the recording process. The video signal is passed through an appropriate high pass (differentiating) filter... | 11/13/1990 |
| 4949168 | Decoding equalizer A decoding equalizer of high definition television signal transmission mode, such as MUSE, and a subrange-type A/D converter suitable for the equalizer. The decoding equalizer samples input data in equalization at a frequency twice the sampling frequency ... | 08/14/1990 |
| 4947241 | Training signal for maintaining the correct phase and gain relationship between signals in a two-signal high definition television system An improved color subcarrier and amplitude reference signal and means for its utilization are provided for color television systems, particularly high definition, wide aspect ratio television systems wherein the high definition signal is decomposed into t... | 08/07/1990 |
| 4694328 | Recombination of low- and high-resolution segments of an extended aspect ratio picture A television (TV) system having provision for automatically compensating for signal distortion which would cause artifacts at the point where high- and low-resolution portions of an extended aspect ratio, high-definition TV display are joined together. Co... | 09/15/1987 |
| 4661839 | Method and apparatus for using a vertical internal test signal for phase control of an offset modulation of offset sampling system In the transmission of a color television signal containing chrominance burst and sync signals over a Nyquist channel between a transmitting station and a receiving station, a method for modulating and synchronously demodulating the television signal acco... | 04/28/1987 |
| 4535353 | Vertical reference signal identification system The horizontal sync component of a composite video signal having a rate H is provided to a phase locked loop (PLL) in the front end of a video signal receiver for synthesizing a horizontal rate signal. A composite sync signal and a 2H signal from the PLL ... | 08/13/1985 |
| 4389671 | Digitally-controlled analog encrypton An apparatus for scrambling a television signal in which horizontal lines of the transmitted television picture are selectively inverted in accordance with the state of a pseudorandom noise generator. In order to permit correction of the throughput gain a... | 06/21/1983 |
| 4375646 | Color television receiver with means for disabling VIR correction during reproduction of recorded broadcast signals In a color television receiver adapted to receive a color television signal containing vertical interval reference (VIR) signals, a VIR correction circuit is provided to automatically control the hue and color saturation of the received broadcast signal, ... | 03/01/1983 |
| 4366498 | I.F. Response control system for a television receiver A system is provided for controlling the intermediate frequency passband response of a television receiver in response to a vertical interval reference (VIR) signal. The baseband VIR signal includes a chrominance reference bar signal component and a lumin... | 12/28/1982 |
| 4359755 | Gating network for a sampling circuit A gating network is described for enabling and disabling a conventional sampling circuit. The gating network includes a pulse generator which develops an enabling pulse in time synchronism with the signal to be sampled by the sampling circuit. The enablin... | 11/16/1982 |
| 4344083 | VIR Gain and phase correction network A network is described for use in a VIR (Vertical Interval Reference) correction system to correct the phase and amplitude, respectively, of the color bursts and chrominance associated with a color television signal. The network includes a phase shifting ... | 08/10/1982 |
| 4344084 | VIR Correction system A VIR Correction system is disclosed for use in a system such as a color television receiver. Television signals of the type under consideration include a plurality of video lines, each line having a standard color burst and video chrominance. On line 19 ... | 08/10/1982 |
| 4306247 | Color signal controlling apparatus A color signal controlling apparatus for controlling a color signal in a color television receiver. The apparatus has a color signal modifier for modifying a color signal; and a color signal stabilizer supplied with a color signal from the color signal mo... | 12/15/1981 |
| 4305089 | Color level automatic control signal generating circuit for generating color level automatic control signals through utilization of VIR signals The present invention relates to an improved circuit arrangement for use in color television receivers for generating color level automatic control signal through utilization of VIR (Vertical interval reference) signal included in the vertical retrace int... | 12/08/1981 |
| 4276560 | Color signal reproducing system and circuit for the same In a color signal reproducing circuit, a red color difference signal from a color demodulator circuit is corrected by a blue color difference signal, and the blue color difference signal is corrected by a luminance signal. The phase of a color subcarrier ... | 06/30/1981 |
| 4262303 | Correct tint indicator circuit for a VIR system In a VIR-responsive television receiver that also includes a manually-operated tint preference control, a circuit for indicating correct setting of that control. A comparator detects approximate equality between the VIR tint control voltage and the tint p... | 04/14/1981 |
| 4228457 | Constant luminance tint reference In a VIR-responsive Tint Control system a dematrixing circuit for synthesizing, from the individual chrominance demodulator outputs, a ZERO-COLOR reference signal. The VIR chrominance interval signal and the ZERO-COLOR reference signals are used as input ... | 10/14/1980 |
| 4215363 | Gated, variable-gain amplifier A variable gain amplifier controlled by alternate sources of gain-control signal. A first, substantially, constant, source has an amplitude corresponding to the amplifier's maximum gain condition. A second, variable, source allows the amplifier gain to be... | 07/29/1980 |
| 4206473 | VIR-Controlled color correction for color video signal receiving apparatus Hue and color saturation are controlled in response to a received VIR signal, the latter having a chrominance reference portion and a luminance reference portion. The level of a preselected one or more demodulated color signals which are produced by the c... | 06/03/1980 |
| 4199779 | VIR-Signal processing circuitry for video tape recorder A VIR-signal processing circuitry for a VTR (video tape recorder) having a comb filter for obtaining a correct operation of the VIR circuit incorporated in a television receivers, comprises a comb filter stopping means for preventing the VITS (vertical in... | 04/22/1980 |
| 4198651 | Television reference signal digital indentification system An electronic system for identifying a particular line of a plurality of lines in a pulse field, where, for example, the pulse field is either of the 262.5-line composite sync pulse trains produced by a conventional television receiver and the particular ... | 04/15/1980 |
| 4197556 | Hue correction circuit In a color video display device, such as a television receiver or a monitor associated with a color video tape recording and reproducing apparatus, and which is responsive to a composite color video signal including a luminance component and a chrominance... | 04/08/1980 |
| 4189740 | Common circuitry VIR control apparatus for color television receiver Color control apparatus for use in color video receiving apparatus of the type capable of receiving a color video signal which includes a VIR signal, the latter having at least a chrominance reference signal therein. A chrominance channel is provided for ... | 02/19/1980 |
| 4183049 | Tint control signal generator for color television receiver A tint control signal generator for a color television receiver for generating a tint control signal to be applied to a tint control for adjustment of the tint of the reproduced television image by the utilization of a reference signal included in the tra... | 01/08/1980 |
| 4183048 | VIR-controlled hue correction circuit A hue correction circuit for use in video display apparatus which is responsive to a composite color video signal including luminance, chrominance, burst and VIR signals. A controllable local oscillator circuit generates a reference oscillating signal of ... | 01/08/1980 |
| 4172262 | Line sampling circuit for television receiver A composite synchronizing signal during a vertical blanking interval includes horizontal sync pulses, equalizing pulses and vertical sync pulses. A line sampling circuit includes a vertical pulse gate which detects and filters an even number of vertical s... | 10/23/1979 |
| 4164750 | VIR killer signal generator for color television receiver A killer signal generator for use in a color television receiver having an information processing circuit for processing specific information such as VIR information contained in a line during the vertical blanking interval. The killer signal generator co... | 08/14/1979 |
| 4160993 | VIR line recognition system A television receiver includes a recognition system identifying the 19th horizontal scanning line of each field of a transmitted television signal for coupling a vertical interval reference (VIR) signal to suitable signal processing circuitry within the r... | 07/10/1979 |
| 4152721 | Saturation control system An automatic saturation control system for a color television receiver using color information extracted from a vertical interval reference (VIR) signal to establish the saturation setting of the receiver. The saturation setting is governed by the ratio o... | 05/01/1979 |
| 4141037 | Signal gating system In processing a video signal, vertical correlation is utilized between video signals of successive line intervals. Video signals from the two line intervals are examined, their existences, polarities and magnitudes between them. If both signals exist with... | 02/20/1979 |
