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| Number | Title | Issue Date |
| 8064592 | Adaptive communication systems and methods Methods and communication systems are presented, in which impulse noise is monitored on a communication channel, and impulse noise protection parameters are adjusted according to the monitored impulse noise without interrupting communication service. ... | 11/22/2011 |
| 8041026 | Event driven noise cancellation Systems and methods for noise cancellation are provided. In particular, information regarding events associated with a computer providing a telephony function or associated with a hardware telephone providing a telephony function is provided to a noise cancellation ... | 10/18/2011 |
| 7835515 | Telephone terminal with control of voice reproduction quality in the receiver A telephone terminal (UE) comprises telephone signal receiver means (MER) and processing means (MT) adapted in the absence of voice activity to determine a level of comfort noise to be generated as a function of noise data and in the presence of received telephone s... | 11/16/2010 |
| 7630489 | Adaptive communication systems and methods Methods and communication systems are presented, in which impulse noise is monitored on a communication channel, and impulse noise protection parameters are adjusted according to the monitored impulse noise without interrupting communication service. ... | 12/08/2009 |
| 7515703 | Method and system for determining conference call embellishment tones and transmission of same A method for providing an embellishment representation of a noise information is discloses. The method comprises measuring a level of the background noise information, wherein the measured level is indicative of a number of people causing the background noise inform... | 04/07/2009 |
| 7492889 | Noise suppression based on bark band wiener filtering and modified doblinger noise estimate In a noise suppresser, an input signal is converted to frequency domain by discrete Fourier analysis and divided into Bark bands. Noise is estimated for each band. The circuit for estimating noise includes a smoothing filter having a slower time constant for updatin... | 02/17/2009 |
| 7466818 | Acoustic shock prevention Acoustic shock is reduced by attenuating an input signal based on tones detected through frequency domain analysis. The spectrum of the input signal is obtained. A relative energy signal includes a plurality of relative energy elements, each representing the relativ... | 12/16/2008 |
| 7460661 | Method and means for increasing inherent channel capacity for wired network A receive system providing enhanced Signal to Noise performance is applicable to a wide variety of applications including both wireless and wireline systems which further include internet type communications. Received signals are converted to digital values and stor... | 12/02/2008 |
| 7454010 | Noise reduction and comfort noise gain control using bark band weiner filter and linear attenuation A combination of noise suppression using a Bark band modified Weiner filter and linear noise reduction improves elimination of noise in a telephone. A detector for detecting long, non-speech intervals is coupled to the output of the noise suppresser and controls sel... | 11/18/2008 |
| 7436786 | Telecommunications system for minimizing the effect of white noise data packets for the generation of required white noise on transmission channel utilization Minimizing the effects of the requisite AGWN packets on transmission channel utilization without diminishing any of the aesthetic quality of the AGWN white noise on the voice or audio communication. A system for minimizing the effect of required generated background... | 10/14/2008 |
| 7369990 | Reducing acoustic noise in wireless and landline based telephony Acoustic noise for wireless or landline telephony is reduced through optimal filtering in which each frequency band of every time frame is filtered as a function of the estimated signal-to-noise ratio and the estimated total noise energy for the frame. Non-speech ba... | 05/06/2008 |
| 7333604 | Adaptive notification of an incoming call in a mobile phone A device and method for handling announcement of an incoming call in a telephone handset at least in part in accordance with a measured ambient noise level is provided. In some embodiments, the disclosed device includes an audio signaling mechanism such as a ringer ... | 02/19/2008 |
| 7260209 | Methods and apparatus for improving voice quality in an environment with noise A method for improving a downlink signal received by a listener on a phone is disclosed. The method includes calculating an environment noise level of the listener and filtering and adjusting gain of the downlink signal based on the environment noise level. ... | 08/21/2007 |
| 7242763 | Systems and methods for far-end noise reduction and near-end noise compensation in a mixed time-frequency domain compander to improve signal quality in communications systems Methods and systems for a mixed time-frequency domain compander, where the expander and compressor are applied in the frequency domain (subbands), while the limiter and the linear gain are applied in the time-domain (full band). Far-end noise reduction is achieved b... | 07/10/2007 |
| 7231036 | Anti-howling circuit detecting howling from effect of predicted echo signal In a system in which echo transferred from a received signal to an outgoing signal is canceled by subtracting an adaptively predicted echo signal from the outgoing signal, howling is detected by detecting the effect of the predicted echo signal. The detected effect ... | 06/12/2007 |
| 7224992 | Four pole stereo headset with push to talk capability in a duplex radio A stereo headset (104) with push-to-talk function can be interfaced with a wireless communication device (102) via a connector interface. The connector interface preferably includes a jack at the wireless communication device (102) and a compati... | 05/29/2007 |
| 7181000 | Voice transmission device and voice transmission system A voice transmission device has a tandem pass through function in an STM, ATM, IP network, and a noise canceller (21) is provided at a latter stage of an echo canceller (12) in a coding part, and in a case where a multistage connection state does not o... | 02/20/2007 |
| 7171246 | Noise suppression A method of noise suppression to suppress noise in a signal containing background noise (314) in a communications path between a cellular communications network and a mobile terminal. The method comprises the steps of: estim... | 01/30/2007 |
| 7155007 | Systems and methods for reducing noise in ADSL transmissions A system (242) processes asymmetric digital subscriber line (ADSL) signals. The system (242) receives a signal that includes an ADSL signal and transient noise (230). The system (242) isolates the transient noise (230) in the signa... | 12/26/2006 |
| 7130705 | System and method for microphone gain adjust based on speaker orientation A system and method for automatically adjusting the gain of an audio system as a speaker's head moves relative to a microphone includes using a video of the speaker to determine an orientation of the speaker's head relative to the microphone and, hence, a gain adjus... | 10/31/2006 |
| 7106853 | Method and means for increasing inherent channel capacity for wired network A receive system providing enhanced Signal to Noise performance is applicable to a wide variety of applications including both wireless and wireline systems which further include internet type communications. Received signals are converted to digital values and stor... | 09/12/2006 |
| 7103176 | Direct coupling of telephone volume control with remote microphone gain and noise cancellation The present invention creates a method, apparatus and system by which a telephone unit volume control provides instantaneous coupling to and controlling of a connected telephone unit's microphone gain and noise cancellation circuitry. With this invention, an increas... | 09/05/2006 |
| 7085715 | Method and apparatus of controlling noise level calculations in a conferencing system Apparatus for controlling noise characteristic estimation in a conferencing system, comprising a noise characteristic estimator for estimating a noise characteristic of a signal of interest transmitted in a first direction through the conferencing system, and a firs... | 08/01/2006 |
| 7082240 | Home and building information system A home and building information system comprises at least one electrical mains supply, which is connected to an electrical power lead, and comprises a local optical information network for exchanging information and for supplying, controlling and monitoring peripher... | 07/25/2006 |
| 7079773 | Power feeding for an optical transmission system A method and an apparatus for optical transmission line power feed interference compensation for compensating for an electrical interference signal in a power feed conductor (12; 52) and in an associated second conductor (14; 54). The interference sign... | 07/18/2006 |
| 7079838 | Communication system, user equipment and method of performing a conference call thereof This invention relates to a communication system (200), user equipment (201,211) and method of performing a conference call. The communication system (200) employs discontinuous transmission and has a plurality of user equipment (201, 211, 21... | 07/18/2006 |
| 7065206 | Method and apparatus for adaptive echo and noise control A method and apparatus for adaptive echo and noise control. A signal can be received at an input to a communication or electronic device. Background noise in the signal can be determined. The order of noise suppression and echo cancellation can be adaptively determi... | 06/20/2006 |
| 7058368 | Adaptive feedforward noise cancellation circuit A method and apparatus for noise cancellation in communications systems. The method is applicable in situations where an interfering signal or noise must be cancelled within a specified bandwidth. A sample of the interfering signal is used to synthesize a cancellati... | 06/06/2006 |
| 7057475 | Ferrite choke An apparatus to filter noise from being induced into a power line. In one a ferrite choke is disclosed that filters noise from being induced into a power line. The ferrite choke includes a tube of ferrite, a supply power line and a return power line. The tube of fer... | 06/06/2006 |
| 7054436 | Communication terminals with a dual use speaker for sensing background noise and generating sound, and related methods and computer program products Communication terminals, methods, and computer program products are provided that sense background noise via a speaker that is also used to generate sounds. In some methods of operating a communication terminal, and a speaker signal is supplied to a first speaker to... | 05/30/2006 |
| 7035400 | Signaling Techniques in channels with asymmetric powers and capacities An improved system and method for communicating information on a transmission medium is disclosed. The disclosed system and method provide improved communications on the transmission medium in the presence of interference, which may take the form of uncorrelated int... | 04/25/2006 |
| 7027604 | Circuit to prevent acoustic feedback for a cellular speakerphone This invention includes a circuit for the prevention of acoustic feedback between an electronic device and an audio accessory. In a preferred embodiment, the circuit prevents audio feedback between a cellular telephone and a speakerphone accessory. The circuit inclu... | 04/11/2006 |
| 7010118 | Noise compensation methods and systems for increasing the clarity of voice communications The amount of noise compensation applied to a signal is controlled by a system operating as both a noise-adaptive expander and compressor based on far-end and near-end noise level estimates. ... | 03/07/2006 |
| 7003099 | Small array microphone for acoustic echo cancellation and noise suppression Techniques for canceling echo and suppressing noise using an array microphone and signal processing. In one system, at least two microphones form an array microphone and provide at least two microphone input signals. Each input signal may be processed by an echo can... | 02/21/2006 |
| 7003094 | Adaptive interference cancellation for ADSL An ADSL front end is implemented with an adaptive AM interference canceller to cancel out either a carrier signal of an interfering AM radio signal, or a carrier signal and its sidebands of an interfering AM radio signal, from a received ADSL signal. By canceling an... | 02/21/2006 |
| 6993127 | Method and apparatus for gradual application of a hitless monitoring access to a communications circuit employing a guided transmission media A monitor access is gradually applied an removed from a communications circuit, including a digital subscriber line (DSL), by a gradual monitor access (GMA) technique, in which a variable impedance element is gradually applied to the communications circuit until the... | 01/31/2006 |
| 6990190 | Method and system for remote telephone calibration A method and system for remotely calibrating a headset telephone with a reliable, accurate and easy to use user interface is provided. This method makes use of the remote programmability of advanced telephone headsets and DTMF signal encoding and permits the custome... | 01/24/2006 |
| 6959082 | Method and system for automatic gain control with adaptive table lookup A method and system for automatic gain control is provided. The automatic gain control may be used, for example, with a microphone and voice codec of a speakerphone telephone. In an exemplary embodiment, an amplification gain lookup table stores the gain values. The... | 10/25/2005 |
| 6952474 | Phone privacy and unobtrusiveness via voice cancellation A method and apparatus for transmitting a clear voice signal while effectuating speech privacy and unobtrusiveness through adaptive signal processing; includes a voice input microphone, an electrical line for transmitting representations of the received voice signal... | 10/04/2005 |
| 6950514 | Voltage reference filter for subscriber line interface circuit A voltage reference filter for a subscriber line interface circuit removes unwanted noise on a DC reference voltage sourced by a device, such as a codec, and employed by the subscriber line circuit as a differential mode voltage baseline. The DC reference voltage is... | 09/27/2005 |
