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| Number | Title | Issue Date |
| 7352411 | Digital IF demodulator A digital IF demodulator includes an analog-to-digital (A/D) converter that receives an analog IF signal and converts it to a digital IF signal. A parallel multiplier then down-converts the digital IF signal to a baseband signal having a video component and an audio... | 04/01/2008 |
| 7305221 | Intermediate frequency circuit of television tuner A mixer for tuning to an intermediate frequency signal, an intermediate frequency amplifier provided at a rear stage of the mixer, an intermediate frequency tuning circuit interposed between the mixer and the intermediate frequency amplifier for tuning to the interm... | 12/04/2007 |
| 7289780 | Band switchable type tuning circuit of television signal A band switchable type tuning circuit has first switch means interposed between a power supply Vcc and an anode of a switch diode, a first resistor whose one end is connected to a cathode of the switch diode, second switch means interposed between the other end of t... | 10/30/2007 |
| 7289167 | Television tuner including distribution connectors A metal frame body has first to fourth side plates and is divided, by a shield plate provided in the metal frame body, into a first compartment area near the first side plate and a second compartment area near the second side plate. A distributor is arranged in the ... | 10/30/2007 |
| 7268836 | Television tuner device generating intermediate-frequency signal free from harmonic interference of reference signal A television tuner device includes a metal frame, including a shielding plate which separates the space defined by the metal frame into a first chamber at a first side plate and a second chamber at a second side plate opposite to the first side plate; a distribution... | 09/11/2007 |
| 7212253 | Home entertainment system audio handling A television (10) for use in a home cinema or surround sound system is provided with an additional audio input (58) for a center audio channel signal from a multi-channel surround sound receiver/amplifier (38). Through system control logic, a co... | 05/01/2007 |
| 7209188 | Intermediate-frequency circuit having flat group delay characteristic An intermediate-frequency circuit includes a mixer for converting a received TV signal to an intermediate-frequency signal; an intermediate-frequency amplifier for amplifying the intermediate-frequency signal; an intermediate-frequency tuning circuit for tuning to t... | 04/24/2007 |
| 7030937 | Simplified TV tuner intermediate frequency circuit Between a mixer and an intermediate frequency amplifying circuit, there are an intermediate frequency tuning circuit which, for reception of a TV signal, is tuned between a chrominance subcarrier frequency and a video intermediate frequency in an intermediate freque... | 04/18/2006 |
| 7002638 | Automatic gain control In a method of automatic gain control for both TV and FM radio signals, the TV and FM radio signals are controllably amplified (AGC-AMP) to obtain amplifier output signals, the amplifier output signals are tuner processed (F, MIX, IF-AMP) to obtain tuner output sign... | 02/21/2006 |
| 6934163 | Capacitor for dram connector In one embodiment, a dummy via is created in a circuit board. The dummy via is positioned and coupled to a portion of a transmission line. This portion of the transmission line is further coupled to a signal lead of a connector, which creates additional capacitance ... | 08/23/2005 |
| 6927805 | Compactly-designed television receiver A television receiver intended to decrease the number of expensive SAW filters to achieve low cost and a compact design. A trap circuit is interposed between a mixer and a SAW filter. During reception of a television signal, one of the trap frequencies at which the ... | 08/09/2005 |
| 6917390 | Intermediate-frequency coupled-circuit for television tuner An intermediate-frequency (IF) coupled-circuit for a television tuner is provided, which is connected between an IF amplifying stage and a video-signal-selection filter, and which comprises a parallel circuit having a second capacitor connected in parallel to a seri... | 07/12/2005 |
| 6914639 | Combination tuner capable of receiving television signal and FM signal A combination tuner includes a switching circuit having three transistors which are selectively turned on and off so that one of a television signal received by a first signal receiving unit using an external antenna that is a high sensitivity antenna, an FM signal ... | 07/05/2005 |
| 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 |
| 6850747 | Image trap filter An image trap filter disposed between the low noise amplifier and the mixer of a radio frequency receiver that overcomes the adverse effect of process variations on image signal rejection for both a single-band radio frequency receiver and a multi-band radio frequen... | 02/01/2005 |
| 6829017 | Specifying a point of origin of a sound for audio effects using displayed visual information from a motion picture Displaying visual information from a motion picture in a visual field within a designated extent of a related aural field supports editing of a spatial audio effect for the motion picture. The extent of a related aural field also is displayed. Information specifying... | 12/07/2004 |
| 6791627 | Television signal receiver In a television signal receiver for receiving and processing television signals (RF) that comprise modulated video signals and modulated audio signals, a tuner (16) receives selected television signals and furnishes at least intermediate frequency (IF) signal... | 09/14/2004 |
| 6590619 | Broadcast sound signal processing circuit A semiconductor integrated circuit in which a band-pass filter, a sound detector, and some other circuits are formed on a single semiconductor substrate. The output signal from an AM detector is passed through a high-pass filter to obtain, substantially, ... | 07/08/2003 |
| 6519008 | Filter circuit For an optimal adjustment of the filter frequency of a signal filter, independently of external influences, process spreads and temperature fluctuations, a filter circuit for filtering at least one sound carrier in a composite video signal by at least one... | 02/11/2003 |
| 6476878 | Method and apparatus for audio signal processing The method, apparatus, and system for controlling audio anomalies by using a mute switch 51 to prevent output of an auxiliary audio signal 21 in a television signal 20 with an auxiliary audio signal 21, such as a NICAM audio signal or dual language audio ... | 11/05/2002 |
| 6426780 | DTV receiver with low-band final I-F signal filtered for suppressing co-channel interfering NTSC audio carrier A digital television receiver converts very-high-frequency intermediate-frequency digital television signal to a band with uppermost frequency in the lower portion of the high-frequency range. This facilitates RLC analog filtering, such as a Butterworth-T... | 07/30/2002 |
| 6417890 | Modulation of pilot tone amplitude in DTV broadcast for faster channel acquisition The existing ATSC broadcast standard is modified to improve both the speed at which the periodically transmitted training sequence is found after channel selection by a viewer and the speed at which synchronization is achieved to a continuous wideband ove... | 07/09/2002 |
| 6335769 | Circuit for automatic discrimination of audio intermediate frequencies A circuit for automatically discriminating audio intermediate frequencies of a received television signal that has a simple, compact and inexpensive circuit structure and can operate stably. The circuit comprises a high pass filter circuit for eliminating... | 01/01/2002 |
| 6111613 | Receiver for television multiplex broadcasting A receiver which receives two-channel multiplex broadcasting by using television sub audio. Two-channel data and/or facsimile data which are multiplexed on the broadcasting sub audio band of the television broadcasting wave including a video band, a main ... | 08/29/2000 |
| 6094229 | IF signal processing circuit for video signal and sound system form in one integrated circuit The following means are integrated in one IF IC: the switching part 60 in the video signal passage for changing over a plurality of sound trap circuits and equalizing circuits 61-64; the switching part 66 in the sound signal passage for changing over a pl... | 07/25/2000 |
| 6081537 | Signal trap device and method, recording medium replay device and method, and signal extraction device and method A signal trap device and method for trapping a desired FM signal out of a frequency multiplexed signal where a plurality of FM signals are included in a frequency multiplexed form. A replay signal reproduced from a video cassette tape is supplied directly... | 06/27/2000 |
| 5995169 | SIF signal processing circuit In an SIF signal processing circuit, an SIF signal, which is an FM signal having a carrier frequency equal to a frequency difference between a video IF carrier and a sound IF carrier, is first converted to a lower carrier frequency common to SIF signals o... | 11/30/1999 |
| 5953066 | Bilingual television signal processor In a bilingual television signal processor which is capable of automatically controlling a bandpass filter for detecting a pilot signal included in a bilingual signal received in a television receiver having a bilingual function without an external adjust... | 09/14/1999 |
| 5864373 | Video signal detection circuit and video signal processing device A video signal detection circuit of the present invention is provided with a trapping circuit which traps frequencies corresponding to color sub-carrier wave signal components and which is disposed between a phase comparing circuit and a voltage controlle... | 01/26/1999 |
| 5754252 | Multi-standard television receiver In a multi-standard television receiver in which a picture signal contained in a television signal and modulated on a picture carrier is converted to a picture signal intermediate frequency, and a stereo sound signal or two-tone signal contained in the te... | 05/19/1998 |
| 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 |
| 5663773 | Demodulator for a complex-value vestigial sideband signal In a demodulator for a complex-value vestigial sideband signal, a Nyquist slope filter which consists of two subfilters (Ra, Ia) is used, a filter device (FBASTP) being connected downstream of, or also capable of being integrated in, the said Nyquist slop... | 09/02/1997 |
| 5654774 | Tuner for digital satellite receiver A tuner of for a digital satellite television receiver comprises a single conversion stage which produces an IF signal at a low enough frequency to permit a SAW filter to be used to perform symbol shaping as well as the normal IF filtering function. The l... | 08/05/1997 |
| 5644368 | Composite signal detecting apparatus having associated filter A detecting circuit for a composite signal containing a video signal and an audio signal. A filter for attenuating the video and audio signals is provided in a PLL circuit loop disposed in the detecting circuit, thus the video or audio signal component ge... | 07/01/1997 |
| 5631714 | Apparatus for automatically adapting the mean sound level of a television receiver A system for automatically adapting the mean sound level of a television receiver. The system for automatically adapting the mean sound level of a television receiver comprises an adapting module comprising both a video adapting circuit comprising at leas... | 05/20/1997 |
| 5577270 | Receiver for eliminating a crosstalk of an adjacent broadcast A receiver has a tuner for converting a radio frequency (RF) signal of a television broadcast supplied thereto into an intermediate frequency (IF) signal, an IF circuit for amplifying the IF signal to obtain an amplified IF signal with a required band wid... | 11/19/1996 |
| 5523801 | Upper and lower adjacent picture signal traps To provide a picture intermediate frequency circuit capable of preventing the occurrence of intermodulation beats in a strong electrical field, without affecting in any way the original picture signal. A picture intermediate frequency signal output from t... | 06/04/1996 |
| 5519505 | Bypassing circuit for use in an audio signal recording/reproducing apparatus An improved audio recording/reproducing apparatus reduces noises in the reproduced audio signal by employing a bypassing circuit which includes a transistor having a low internal resistance.... | 05/21/1996 |
| 5483298 | Circuit arrangement for demmodulating the sound signals in a television signal in accordance with at least two different transmission standards A circuit arrangement for demodulating the sound signals in a television signal is described, which circuit arrangement ensures a simple and low-cost structure, also for operation at different transmission standards. To this end, the circuit arrangement a... | 01/09/1996 |
| 5379078 | Trap circuit apparatus for television receiver A trap circuit apparatus for a television receiver comprising: a first trap circuit for producing a first trapped video signal by reducing a component level of a sound detection signal included in and accompanied with a video detection signal from a tuner... | 01/03/1995 |
