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| Number | Title | Issue Date |
| 7199844 | Quadratic nyquist slope filter A television demodulator circuit, for use in a television receiver, generates baseband video and audio outputs from a television signal, such as an intermediate frequency television signal. The I, Q demodulator circuit mixes the television signal with an in-phase (�... | 04/03/2007 |
| 7102465 | Frequency discrete LC filter bank An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and capacitors configured in at least one capacitive (“C”) bank. The i... | 09/05/2006 |
| 7088202 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 08/08/2006 |
| 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 |
| 6496229 | TV receiver using read-only memory shared during VSB and QAM reception for synchrodyning I-F signal to baseband In a digital TV receiver a single digital complex multiplier is used for digitally synchrodyning digital intermediate-frequency signal to baseband both during the reception of VSB digital television signals and during the reception of QAM digital televisi... | 12/17/2002 |
| 6256357 | Communication system At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into sig... | 07/03/2001 |
| 5446500 | Noise reducing apparatus and methods for television receivers A high-performance television receiver synchronously detects the picture IF signal. A synchronous impulse noise in the IF signal generates either positive-going noise or negative-going noise in the video signal supplied from a synchronous video detector, ... | 08/29/1995 |
| 5357283 | Reflected modulated television system A television system, the composite color television signal (EM (t)) whereof is generated using reflected modulated signals (E3 (t)), wherein at the transmitting side video signals (E1-1 (t), E1-2 (t)) are used t... | 10/18/1994 |
| 5191417 | Compatible EDTV system providing multi-aspect ratio display on EDTV and conventional television receivers An extended definition television (EDTV) system transmits, receives and displays both EDTV and conventional signals using a NTSC channel bandwidth. The system produces an EDTV broadcast signal having a picture with a 16:9 aspect ratio and at least one adj... | 03/02/1993 |
| 5177597 | Television signal multiplexing and demultiplexing system A television signal multiplexing and demultiplexing system includes a signal separation circuit for separating from a composite color television signal a plurality of first television signals serving as additional information for making the quality of a t... | 01/05/1993 |
| 5103310 | Interference reduction for extra-spectrum, compatible television system The present invention is directed to an improved solution to the problem of interference in the picture displayed by a standard NTSC receiver that results from a received television signal that includes a quadrature-amplitude modulated additional-informat... | 04/07/1992 |
| 5055916 | Chrominance encoding for a widescreen television system A widescreen television system includes an auxiliary subcarrier modulated with left and right side panel luminance and chrominance components. The chrominance modulating component represents the difference between the average side panel chrominance inform... | 10/08/1991 |
| 4985769 | Multiplex TV signal processing apparatus Disclosed are multiplex television signal processing apparatuses in a television signal transmitting and receiving system. An apparatus at the transmitting side comprises: a signal separator to separate a multiplex signal into a first and a second part; a... | 01/15/1991 |
| 4979020 | Television signal encoded with auxiliary vertical-temporal information A system for encoding a progressive scan widescreen EDTV signal so as to be compatible with a standard NTSC receiver develops an auxiliary signal containing vertical-temporal information derived from image frame difference information of the progressive s... | 12/18/1990 |
| 4944032 | Multiplex signal processing apparatus A multiplex signal processing apparatus in a singal transmitting and receiving system includes at the transmitting side: a first amplitude-modulator for modulating a first carrier by a main signal to obtain a vestigial sideband, amplitude-modulated main s... | 07/24/1990 |
| 4918515 | Compatible television transmission system with separate preemphasis path within single channel A method for reducing noise and interference artifacts in a television system including a transmissiion end for transmitting a quadrature modulated color subcarrier television signal through a degrading medium and for display at a reception end, the metho... | 04/17/1990 |
| 4879606 | EDTV recording apparatus Extended definition television (EDTV) signals including a compatible composite wideband signal and a separate helper or extended definition signal are combined, for example, for recording purposes, using frequency multiplexing techniques. The helper signa... | 11/07/1989 |
| 4855811 | Apparatus for processing auxiliary information in an extended definition widescreen television system An NTSC compatible, single broadcast channel, widescreen EDTV system encodes and decodes a television signal comprising: (1) a main, standard formal NTSC signal component with low frequency side panel image information compressed into the overscan regions... | 08/08/1989 |
| 4535352 | Technique for generating semi-compatible high definition television signals for transmission over two cable TV channels The present invention relates to a technique for generating a Semi-Compatible High Definition Television (SC-HDTV) signal which can be sent over two present-day Cable Television (CATV) channels. In accordance with the present invention, a HDTV signal is f... | 08/13/1985 |
| 4521803 | System for compatible transmission of high-resolution TV A high-resolution television system is described which provides twice the vertical resolution of present television standards and is compatible therewith. A high-resolution television camera substantially simultaneously provides information from each of a... | 06/04/1985 |
| 4473837 | System for encoding and decoding video signals A system is described which makes use of the fact that in a raster scanned television system a high degree of correlation exists both in the luminance and in the chrominance signals of a pair of adjacent lines. Because of this correlation, the difference ... | 09/25/1984 |
