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| Number | Title | Issue Date |
| 7263341 | Audio demodulating circuit and television broadcast receiver An audio demodulating circuit in accordance with the present invention for demodulating audio signals in a plurality of broadcast systems of mutually different frequency deviations such as the NTSC and the PAL, is arranged such that a connection between a trap circu... | 08/28/2007 |
| 7138858 | Apparatus and methods for output buffer circuitry with constant output power in radio-frequency circuitry A buffer circuitry buffers a radio-frequency (RF) signal. The buffer circuitry includes a complementary pair of switches and a power source. The a complementary pair of switches has an input terminal and output terminal. The input terminal of the complementary pair ... | 11/21/2006 |
| 7119834 | Receiver and system calibration system and method Systems and methods which implement calibration for signal errors in a communication network, such as non-uniform frequency response, are disclosed. According to a preferred embodiment of the invention, a calibration signal is communicated through the network and a ... | 10/10/2006 |
| 7106388 | Digital IF demodulator for video applications An integrated communications system. A substrate having a receiver disposed on the substrate for converting a received signal to an IF signal, a digital IF demodulator disposed on the substrate and coupled to the receiver for converting the IF signal to a demodulate... | 09/12/2006 |
| 7075957 | Controlling an optical source using a beat frequency An apparatus and method of controlling an optical signal includes superimposing at least one optical reference signal and the optical signal to obtain at least one interference signal having an actual beat frequency, and pre-selecting one or more of the at least one... | 07/11/2006 |
| 7061542 | Television receiving method and television receiver A receiving section for digital television broadcasting and a receiving section for analog television broadcasting are provided. When a digital television broadcasting program is selected, it is judged whether or not an analog television broadcasting program having ... | 06/13/2006 |
| 7031668 | Adaptive radio transceiver with a local oscillator An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ... | 04/18/2006 |
| 6956622 | Method and apparatus for modulating video signals A luminance component of a video signal is modulated in a first frequency band. A chrominance component of the video signal is modulated in a second frequency band. The modulated luminance component and the modulated chrominance component are then transmitted across... | 10/18/2005 |
| 6952237 | Apparatus and method for transmitting audio over a dedicated video line Disclosed is a method and apparatus for transmission of audio signals over a dedicated video transmission line in which the analog audio signal is inserted into and becomes a part of the video signal. Samples of the audio signal are inserted into the active video li... | 10/04/2005 |
| 6940563 | Language switching method and digital broadcast receiver using the method In a digital broadcast receiver, a digital broadcast receiver 10 can select an arbitrary language among plural kinds of languages and output sound by said language, and has a configuration comprising EEPROM 18 for storing the selected language, an MPU ... | 09/06/2005 |
| 6933986 | Sharply tuned bandpass filter A sharply tuned bandpass RF filter is presented herein. The filter has an input port for receiving television RF signals and passing same to an output port for application to a load. The filter is tuned such that it exhibits the characteristic of passing only RF sig... | 08/23/2005 |
| 6903781 | Video signal processing apparatus A video signal processing apparatus comprises a sub-screen processing integrated circuit for subjecting a sub-screen video signal to scale-down processing to reduce its display region and output the sub-screen video signal, and a main-screen processing integrated ci... | 06/07/2005 |
| 6888580 | Integrated single and dual television tuner having improved fine tuning Improved television tuning circuits are disclosed. An example tuning circuit includes a fraction-N frequency synthesizer facilitating fine tuning. This tuning circuit may be formed using relatively few independent oscillators. The tuning circuit lends itself to the ... | 05/03/2005 |
| 6879349 | Broadcasting receiver with automatic audio selection function A broadcasting receiver that receives broadcasting signals transmitted by a broadcasting station accompanying audio signals of multiple languages and automatically selects a certain broadcasting language to be outputted is described here. The receiver is capable of ... | 04/12/2005 |
| 6876401 | FM-broadcast-receivable television tuner for preventing adjacent-channel interference A trap circuit system includes a first trap portion and a second trap portion. In the first trap portion, a first capacitor is provided in parallel to a first switch diode. A control voltage is applied to the cathode of the first switch diode so as to change the tra... | 04/05/2005 |
| 6714255 | Video apparatus delivering video signals, notably S-Video signals A video apparatus has a video source with a luminance output carrying a first luminance signal and a chrominance output carrying a chrominance signal, an OSD circuit generating OSD signals and a fast-blanking signal, and a connector for delivering video signals. A c... | 03/30/2004 |
| 6567058 | Digital convergence correction device and display device A problem to be solved by the invention is to prevent a digital convergence correction device from lowering in precision of correction performed when a relation between screen raster and effective area of picture varies. A vertical display area detection signa... | 05/20/2003 |
| 6545728 | Digital television receivers that digitize final I-F signals resulting from triple-conversion Receiving apparatus for digital television signals digitizes a final intermediate frequency signal supplied from a triple-conversion radio receiver and synchrodynes the digitized final intermediate frequency signal to baseband. The triple-conversion radio... | 04/08/2003 |
| 6307598 | Plural-conversion TV receiver converting 1st I-F to 2nd I-F using oscillations of fixed frequency above 1st I-F. Plural-conversion radio receivers for receiving DTV signals, in accordance with the Advanced Television Systems Committee (ATSC) standard, or analog TV, in accordance with the National Television Sub-Committee (NTSC) standard, utilize a first intermediate... | 10/23/2001 |
| 6008862 | Perceived color transient improvement In a method of obtaining an improved perceived color transient, an artificial transient signal is inserted (50) into a luminance signal (Yin) when it is detected (10, 20, 30) that there is an edge in a chrominance signal (Cin) in the absence of an edge in... | 12/28/1999 |
| 5949498 | Diversity system An antenna diversity system for the mobile reception of VHF and UHF television signals in different frequency ranges that are separated by gaps by a mobile television receiver connected to a plurality of antennas through an antenna switch, wherein the out... | 09/07/1999 |
| 5703662 | Television for storing and displaying still picture A television for storing and displaying a stored still picture, which includes: a memory for storing a still picture of a desired scene; a decoder for separating a video signal of a broadcast channel into an RGB signal and a synchronizing signal; a synchr... | 12/30/1997 |
| 5673088 | Multi-broadcast selection apparatus A channel selection apparatus is provided for allowing receipt of signals broadcast according to the NTSC, SECAM and PAL broadcast modes. A controller discriminates the signal's broadcast mode based on the horizontal sync signal included in the received s... | 09/30/1997 |
| 5473390 | Component to composite video signal converter circuit A bias source (R7,R8,C24) connected to a summing amplifier (Q1) produces a first DC bias at the amplifier input (emitter) and a second DC bias at the amplifier output (collector). A first circuit node (B) is AC coupled (22) to a luminance signal source (Y... | 12/05/1995 |
| 5416534 | Monitor apparatus including video processing circuit for selecting image quality modes In a monitor apparatus for a television system, a dynamic range of a brightness level of an image quality is widened, and an image very similar to a picture of a movie film is represented on the monitor apparatus. With employment of the YM function for pe... | 05/16/1995 |
| 5341179 | Source voltage control switching circuit In a BS (direct broadcast by satellite) timer recording mode, a constant voltage diode for controlling 18 V is directly inserted in a power circuit. Alternatively, a delay circuit is inserted at the input of a switching circuit for switching the constant ... | 08/23/1994 |
| 5264936 | System for adjusting filters processing the composite video signal in a secam multistandard set A system for adjusting filters processing the composite video signal in a multistandard set by determining the tuning phases during the quiescent phases of the composite video signal. A reference signal (fref) is applied to the filter during th... | 11/23/1993 |
| 5181103 | White balance adjusting system for a color television system A white balance adjusting system for a color television system has three CRTs for projecting beams of three primary colors, and a color control circut for controlling outputs of the three CRTs. Three sensors are provided adjacent each CRT for detecting qu... | 01/19/1993 |
| 5134465 | Color detecting circuit In the invention, in order to correct only the hue of specific region of color correction of an image processing circuit for a television receiver or the like, using color detecting means for detecting specific color, color signals are inputted and two ar... | 07/28/1992 |
| 4782385 | Frequency conversion of an RF signal transmitted for color-television receivers The frequency conversion of an RF signal is performed by the "third method" using a suitable frequency reversal which makes the frequencies of the picture carrier, the chrominance subcarrier, and at least one sound carrier appear transformed into the base... | 11/01/1988 |
| 4739407 | Frequency modulation television receiver with tracking filter A wide-band FM receiver for satellite-transmitted NTSC color television signals includes a novel tracking filter circuit for extending the noise threshold of the receiver. The tracking filter circuit includes a voltage steerable bandpass filter and a feed... | 04/19/1988 |
| 4641181 | Signal to noise ratio enhancement using baseband signals in an FM television system In an FM television signal angle modulated with luminance and chrominance information, there exists a high degree of correlation between picture elements occurring one line period apart. In an effort to steer the pass band of a tunable bandpass filter to ... | 02/03/1987 |
| 4623926 | Television synchronous receiver A television synchronous receiver includes: a voltage controlled oscillator; a 90° phase shifter for shifting the phase of the voltage controlled oscillator output by 90°; first and second synchronous detectors for synchronously detecting in-phase and q... | 11/18/1986 |
| 4584599 | Signal to noise ratio enhancement using baseband signals in an FM television system In an FM television signal angle modulated with luminance and chrominance information, there exists a high degree of correlation between picture elements occurring one line period apart. In an effort to steer the pass band of a tunable bandpass filter to ... | 04/22/1986 |
| 4544947 | Adjustment-free drive circuit for color television picture tubes Adjustment-free drive circuit for color television picture tubes, including an amplifier having a non-inverting input receiving an equalized signal of an individual color component red, green or blue as a reference value, an inverting input receiving a vo... | 10/01/1985 |
| 4530005 | AFC circuit for television tuner An AFC circuit for use in a television tuner includes a mislocking prevention device for shifting the AFC voltage toward the audio carrier when the power switch is turned on or the channel is changed, so that the color carrier will not be inadvertently lo... | 07/16/1985 |
| 4283739 | Color television receivers In a color television receiver, especially for NTSC or PAL color television signals, the intermediate frequency is a phase-lock integral multiple of the sub-carrier frequency. Preferably the intermediate frequency is 4N times the sub-carrier frequency, wh... | 08/11/1981 |
| 4212029 | Elastic surface wave filter for color television receiver It has been known that a sound trap or band pass amplifier makes the group delay characteristic of a chromaticity signal component non-uniform. The present invention provides an elastic surface wave filter whose amplitude characteristic is so determined a... | 07/08/1980 |
| 4188639 | Video synchronous detector apparatus A video synchronous detector apparatus for discriminating a video intermediate frequency signal, in which the video intermediate frequency signal is divided into two parts, one of which is applied to one terminal of a multiplier circuit, and the other of ... | 02/12/1980 |
| 4096517 | Video amplifier A wide bandwidth, low power dissipation, cascode video output amplifier suitable for driving an in-line gun color picture tube or the like. The cascode amplifier includes a low voltage, small signal, common emitter amplifier transistor and a high voltage ... | 06/20/1978 |
