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| Number | Title | Issue Date |
| 7734265 | Audio muting circuit and audio muting method In an audio muting circuit, after a short delay from a first time at which a first mute signal generation circuit causes a first mute signal to fall from “H” level to “L” level, a second mute signal generation circuit causes a second mute signal to fall from... | 06/08/2010 |
| 7369826 | Method for monitoring broadcast signals at alternative frequencies and gain control unit Many broadcast stations transmit their programs via a variety of different frequencies. The invention relates to monitoring alternative frequencies during the reception of a broadcast signal at a present frequency. Whenever the broadcast signal at an alternative fre... | 05/06/2008 |
| 7317601 | Electrostatic discharge protection device and circuit thereof An electrostatic discharge (ESD) protection circuit including a detection circuit for detecting the ESD current and a clamp circuit for bypassing an ESD current between a first pad and a second pad is provided. The detection circuit is connected between the first pa... | 01/08/2008 |
| 7313375 | Follow-me broadcast reception method and system Methods and systems for seamlessly broadcasting data to a user moving among a plurality of broadcast coverage areas. A first signal containing desired data may be received by a receiving device at a user location, wherein the first signal is broadcast from a first t... | 12/25/2007 |
| 7181229 | System which automatically disables or switches off a cellphone This invention relates to a system for disabling a cellphone in the presence of certain conditions, and for switching it off in the presence of some other conditions, while allowing its use in the normal fashion in the absence of these two sets of conditions. Thus, ... | 02/20/2007 |
| 7133468 | Concurrent FM signal receiver A method and apparatus are provided which detects distortion in a received FM signal caused by amplitude modulating and phase transition of two combined FM signals. A method corrects and modifies the distortion by detecting a distorted sample, replacing the distorte... | 11/07/2006 |
| 7127074 | Method and apparatus for sleep conditioning Disclosed is a baby monitor which includes a base unit having a microphone for receiving sound and a transmitter for conveying the sound to a remote unit, and a remote unit including a receiver for receiving the sound from the transmitter and a speaker for reproduci... | 10/24/2006 |
| 7116959 | Apparatus for selecting a receiver among a plurality of receivers in a diversity receiver system based upon automatic gain correction A diversity receiver system includes a plurality of radio receivers that each provide a uniquely associated receiver output signal and a uniquely associated receiver control signal indicative of the amount of gain applied by the associated radio receiver to create t... | 10/03/2006 |
| 7069027 | Silent zone muting system A muting system (10) according to the present invention enables wireless communication devices (16,18) that enter a silent zone to generate a silent zone advisory message (64) and subsequently mute the wireless communication devices (16, 18 | 06/27/2006 |
| 7031680 | Stop-on-station method and apparatus A method for stopping on a radio station includes calculating a radio signal quality (205) using a multipath echo indicator and determining if the radio signal quality is greater than a predetermined signal quality threshold (210). A zero crossings ind... | 04/18/2006 |
| 7006806 | System and method for SAP FM demodulation Certain embodiments of the present invention provides a system and method for SAP FM demodulation. The system includes a bandpass filter for isolating the SAP signal, a Hilbert filter to produce a copy of the SAP signal phase shifted by 90 degrees, an FM demodulator... | 02/28/2006 |
| 6961548 | Method for masking interruptions on playback of received radio signals A method of masking interruptions in the playback of received radio signals is provided, in which lengthy interruptions are allowed only when modulation of the radio broadcast program currently being received is recognized as speech, and a modulation pause in the re... | 11/01/2005 |
| 6961536 | Receiver control using vehicle state conditions A broadcast receiver which automatically tunes to a signal source depending on a set of rules and vehicle state conditions, such as seat occupancy, door sensors, time, day of the week, weather conditions, program content rating, vehicle location, user language prefe... | 11/01/2005 |
| 6961550 | Radio receiver that changes function according to the output of an internal voice-only detector A radio receiver includes a voice-only detection mechanism that detects when the current radio station is transmitting mostly voice, and that changes the function of the receiver depending on whether or not the current radio station is transmitting mostly voice. In ... | 11/01/2005 |
| 6865379 | Automatic radio button mute A system and method of eliminating static while utilizing pre-programmed tuner buttons on a radio is disclosed. The system of the present invention mutes a pre-programmed tuner button frequency when the radio signal for the pre-programmed frequency is below a thresh... | 03/08/2005 |
| 6675002 | System and method for automatically muting cellular telephone devices in noise sensitive areas A system, apparatus and method for inhibiting the ringer of a cellular telephone within a noise sensitive area includes a transmitter for generating a control signal within the area. A receiver within the cellular telephone generates a mute signal during ... | 01/06/2004 |
| 6480722 | Radio receiver Radio receivers which switches the received voice signal according to a supervisory signal used for supervising the condition of the propagation path through which the voice signal is transmitted are known. However, if the reception level of the radio wav... | 11/12/2002 |
| 6408166 | Method for controlling gain of transmission signal In accordance with the present invention, a method is disclosed for preventing noise spikes due to abrupt changes of a transmission signal in a cordless telephone. The method is comprised of two sub-methods where a first sub-method for controlling the gai... | 06/18/2002 |
| 6389293 | Method and apparatus for providing call screening on cordless telephone equipment using three-way calling A cordless telephone includes a ring detector state machine module to facilitate the answering of a call received at the cordless telephone. A screening state machine module enables three-way connection and aural monitoring of the incoming call on the cor... | 05/14/2002 |
| 6385440 | Mobile communication receiver with asymmetric muting control A mobile communication receiver generates an audio signal from a radio signal received on a communication channel, detects conditions on the communication channel, mutes the audio signal according to a first rule when the channel conditions are bad, and u... | 05/07/2002 |
| 6370366 | Telephony device comprising a base station and at least a subscriber unit, subscriber unit for such a telephony device and method used in such a telephony device A communication device communicates with a station and includes a receiver which receives speech signal frames from the station. The speech signal frames have speech signals. The communication device further includes a counter and an attenuation circuit. ... | 04/09/2002 |
| 6188731 | Apparatus and method for synchronizing audio/video signal An apparatus and method for synchronizing audio and video signals wherein the motion of a picture is detected in case of occurring timing difference between the audio and video signals and subsequently a threshold is adjusted in association with the detec... | 02/13/2001 |
| 6107960 | Reducing cross-interference in a combined GPS receiver and communication system A method and apparatus is disclosed for reducing cross-interference in a combined satellite positioning system receiver and communication transceiver device. A control signal is transmitted from the communication transceiver to the satellite positioning s... | 08/22/2000 |
| 5809407 | Receiver, an arrangement and a method for comparing two signals A receiver, an arrangement and a method for comparing two signals, based on testing whether a first signal exhibits at least one property during a first time interval, and consecutively testing if a second signal exhibits at least one similar property dur... | 09/15/1998 |
| 5745845 | Receiver with automatic receiving-station switching function A receiver with an automatic receiving-station switching function for automatically switching a current receiving frequency from a reception frequency of a broadcast wave in reception to a reception frequency of a broadcast wave of another station, which ... | 04/28/1998 |
| 5575002 | Method for muting a radio When a portable radio (110) receives a transmission from a mobile radio (105), the portable radio (110) mutes a speaker volume of the portable radio (110) for a duration of the transmission from the mobile radio (105). In an arrangement of the mobile radi... | 11/12/1996 |
| 5493711 | Radio receiver for locating the strongest signal carrying a selected program A receiver has a random counter, which outputs a timer signal to a control circuit. A zero-cross point detection circuit generates a detection signal which is input to the control circuit. When the random counter outputs a timer signal and the zero-cross ... | 02/20/1996 |
| 5390343 | Method of tuning a radio receiver using RDS information For tuning a microcomputer-controlled radio receiver to the one of several transmitters broadcasting the same program best satisfying the requirements for quality of reception the information obtained from the RDS data stream is memorized in a table of th... | 02/14/1995 |
| 5390341 | System and method for muting and unmuting a communication device A system (200) for muting a portable radio (104) includes a mobile radio (106) having a mute switch (108). Upon activating the mute switch (108), a signalling message is generated (ISW) by radio (106) that is in turn transmitted to the system central cont... | 02/14/1995 |
| 5239702 | Tuning detector This present invention relates to a tuning detector used for an FM receiver, and it has a mute band detecting function to solve a problem in relation to setting of a ratio of a tuning detection band to a non-mute band. For this reason, a resistor for sett... | 08/24/1993 |
| 5220685 | Mute and automatic restore device for communications receivers The mute and automatic restore device is an apparatus for communication receivers and the like, whereby voice or code conversations or messages emanating from the monitoring speaker can be muted by the push of a button and the apparatus will determine the... | 06/15/1993 |
| 5103315 | Stereo audio mute circuit A stereo television receiver includes a microprocessor for developing logic level control signals for controlling tuning, video processing and a LED stereo indicator. A sync separator circuit supplies a horizontal signal to a peak detector which supplies ... | 04/07/1992 |
| 5020141 | Adaptive identifying signal detector A radio receiver capable of receiving more than one channel, one of which channels may be a priority channel, wherein some communications may be accompanied by a sub-audible continuous identifying signal, which signal can be detected by the radio in an ad... | 05/28/1991 |
| 4888815 | Scanning radio receiver A multi-band scanning radio receiver operable without reprogramming in a plurality of geographical regions. Digital codes for public-service-band frequency allocations for each of a plurality of geographical regions are stored in a memory which is sequent... | 12/19/1989 |
| 4829592 | Circuit and method of suppressing inter-station radio tuning noise To suppress tuning noise interferences, and particularly transients, such as whistles and the like, especially in FM receivers during returning of the receiver, an inter-station retuning muting circuit is, in accordance with the invention, modified by inc... | 05/09/1989 |
| 4683386 | Electronic attenuation value control circuit in which switching noise is suppressed A digital controlled volume attenuator includes a plurality of resistors connected in series between a signal input terminal and a reference potential point and a plurality of electronic switches having one ends respectively connected to the connection po... | 07/28/1987 |
| 4641190 | Muting system A blanking signal is generated in a television receiver when a channel change selection is made. The blanking signal is low-pass filtered and thereafter controls the muting of the audio channel. Muting and un-muting are thus accomplished gradually, withou... | 02/03/1987 |
| 4641367 | Receiver for FM signals with transmitter status code storage In a receiver for FM-signals, more specifically a car radio, the tuning data for those FM-transmitters which transmit the same program are stored in addressable memory locations of a first memory field. In order to be continuously tuned to the best receiv... | 02/03/1987 |
| 4628539 | Muting circuit A television receiver has provisions for a second audio program (SAP) and an indication for signifying when the SAP is present and a muting circuit for muting the SAP, both in response to the output signal of a SAP detector. A filter capacitor is coupled ... | 12/09/1986 |
| 4627101 | Muting circuit A television receiver has provisions for a second audio program (SAP) and an indication for signifying when the SAP is present and a muting circuit for muting the SAP, both in response to the output signal of a SAP detector. A filter capacitor is coupled ... | 12/02/1986 |
