U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Celebrity Inventors

Penn Jillette of Penn and Teller fame has patented a "Hydro-Therapeutic Stimulator", which uses a hot tub for stimulation.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 455/570 - Noise suppression or echo cancellation


Subclass of Class 455 - Telecommunications
Definition: Subject matter wherein any undesired electrical disturbance
No. of patents: 244
Last issue date: 02/21/2012


1              
NumberTitleIssue Date
8121654Apparatus and method for removing an echo signal in a signal transmission/reception apparatus of a communication system
A method and apparatus for removing an echo signal in a signal transmission/reception apparatus of a communication system is provided. A signal transmission/reception apparatus estimates an input channel response using a training sequence, generates a first signal b...
02/21/2012
8108011Signal correction device
A signal correction device including: an orthogonal transform section configured to perform an orthogonal transform for an input signal that includes a speech as a target signal and an unnecessary non-target signal; an interval determining section configured to dete...
01/31/2012
8073497Echo canceller with correlation using pre-whitened data values received by downlink codec
Duplex audio communications over a network use compressed audio data, with linear prediction coefficients (LPCs) and variances by which sample values differ from predictions. A adaptive echo canceller for a transceiver develops finite impulse response filter (FIR) c...
12/06/2011
8068884Acoustic echo reduction circuit for a “hands-free” device usable with a cell phone
A device comprising a circuit for picking up acoustic signals with the microphone; a circuit for playing back audio signals with an amplifier and a loudspeaker; an interface circuit for interfacing with a telephone network or a cell phone; and a circuit for digitall...
11/29/2011
8064966Method of detecting a double talk situation for a “hands-free” telephone device
The device comprises a microphone for detecting a speech signal from a near speaker, and a loudspeaker for reproducing a speech signal from a remote speaker. The processing for canceling the interfering acoustic echo implements an adaptive linear filtering algorithm...
11/22/2011
8060151Apparatus for position-dependent control
An apparatus for position-dependent control has a control unit, where the control unit takes the position of the apparatus as a basis for: a) controlling damping and/or echo cancellation for the apparatus, and/or b) switching a summit of the apparatus on or off or t...
11/15/2011
8036716Temporary storage or specialized transmission of multi-microphone signals
A communication device contains multiple microphones that receive acoustic signals from a user and from the background. The acoustic signals from the user are enhanced using the background acoustic signals to reduce background noise. The enhanced signal are transmit...
10/11/2011
7996048Enhanced call reception and privacy
An audio interface adapted to reduce a subscriber voice may receive a subscriber voice and a background noise. The subscriber voice may then be compared to the to the background noise. If the received subscriber voice is louder than the received background noise, th...
08/09/2011
7953456Acoustic echo reduction in mobile terminals
An electronic device includes first and second speakers, a microphone, and circuitry configured to generate first and second audio signals in response to a source audio signal, to play the first audio signal over the first speaker, and to play the second audio signa...
05/31/2011
7929997Noise detecting apparatus and AM broadcast receiving apparatus
A noise detecting apparatus detecting presence or absence of noise in a received signal, comprising: a first band selecting unit configured to select a first signal of a first frequency band that does not include a frequency band of the received signal and is higher...
04/19/2011
7907977Echo canceller with correlation using pre-whitened data values received by downlink codec
Duplex audio communications over a network use compressed audio data, with linear prediction coefficients (LPCs) and variances by which sample values differ from predictions. A adaptive echo canceller for a transceiver develops finite impulse response filter (FIR) c...
03/15/2011
7865217Electronic device for reducing audio noise caused from unbalanced ground and mobile communication device thereof
An electronic device includes a first circuit board having a first audio source and a first reference grounding end, a second circuit board having a second audio source and a second reference grounding end, a flexible board cable, a grounding wiring, a selection uni...
01/04/2011
7856252Method for seamless noise suppression on wideband to narrowband cell switching
A method for seamless noise suppression on wideband to narrowband cell switching is described. In one embodiment the method includes applying noise suppression to a telephone signal using a first noise suppressor while operating a telephone in a first operating mode...
12/21/2010
7835774Removal of local duplication voice on conference calls
The present invention provides mechanisms for removing duplicate signals during a communication session. More particularly an over-air signal is received at a given endpoint and a stream of electronic data is monitored at the same endpoint for a duplicate to the ove...
11/16/2010
7835773Systems and methods for adjustable audio operation in a mobile communication device
A method for adjusting the volume and frequency response for the audio output in a mobile communication device comprises estimating the noise level of the environment surrounding the mobile communication device and then adjusting the volume and frequency response ba...
11/16/2010
7764980Mobile communication terminal for removing noise in transmitting signal and method thereof
A mobile communication terminal for removing noise in a transmitting signal and a method thereof are provided. The mobile communication terminal includes a first microphone for capturing a voice signal to be transmitted a second microphone attached to a position dif...
07/27/2010
7751856Coordination of apparatus and mobile terminal media processing circuitry
An accessory device for a mobile telecommunications terminal is disclosed, wherein the mobile telecommunications terminal comprises means for media processing and means for connecting to the accessory device. The accessory device comprises circuitry adapted to provi...
07/06/2010
7747292Techniques for adaptive interference cancellation
Techniques to perform adaptive interference cancellation are described. A first apparatus may include a timing recovery module to produce a timing recovery command signal, an interference canceller to receive an interference reference signal and produce an interfere...
06/29/2010
7676250Method for controlling audio signals to an FM transmitter and a loudspeaker of a hands-free adapter
A method (200) for controlling audio signals to an FM transmitter and a loudspeaker of a hands-free adapter first sends a first audio signal to the loudspeaker (242) and measures and records a loudspeaker audible artifact such as echo return loss (2...
03/09/2010
7647077Method for echo control of a wireless headset
The present invention provides a wireless headset with echo control and noise cancellation. The present invention also provides a method with phase reversion for echo control of a wireless headset wherein the wireless headset comprises closely disposed speakers and ...
01/12/2010
7457644Microphone position and speech level sensor
Improper microphone position and speech level on a telephone headset is sensed by comparison of a speech envelope to multiple signal threshold levels. A first threshold is used to determine whether a headset user is talking. A second threshold is used to determine w...
11/25/2008
7433716Communication apparatus
A communication apparatus is described that automatically allocates the position of participants in a group call at various positions in sound-space. The position of each user is such that the user can distinguish between each participant of the call by the position...
10/07/2008
7433665Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same
A communication circuit for an Ethernet or other network transceiver includes a first sub-circuit having a first input which receives a composite differential signal including first and second differential signal components, a second input which receives a different...
10/07/2008
7400910Speaker sound enhancement for a mobile terminal
The present invention relates to a mobile terminal such as a mobile telephone or the like which has a speaker built in, and realizes a sound emission structure for separately extracting the front output and back output of the speaker in a plurality of directions. Th...
07/15/2008
7386327Apparatus and method for controlling noise in a mobile communication terminal
An apparatus and method for controlling a volume of comfort noise in a mobile communication terminal. The mobile communication terminal includes a vocoder for detecting a decoding rate of voice data received after establishing a voice call to output a detection sign...
06/10/2008
7369652Combining signals at a conference bridge
Combining signals includes receiving signals from communication devices, where each signal is associated with a content describing the signal. The following is repeated for each signal: the content associated with a signal is examined, whether the signal is a voice ...
05/06/2008
7366244Method and system for antenna interference cancellation
A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ...
04/29/2008
7359856Speech detection system in an audio signal in noisy surrounding
A method of detecting speech in an audio signal comprises a step of obtaining information on the energy of the audio signal, the energy information then being used to detect speech in the audio signal. The method further comprises a step of obtaining information on ...
04/15/2008
7359443Method for compensating for peak values during a data transmission with discrete multitone symbols and a circuit arrangement for carrying out the method
The invention provides a method for transmitting an analog data stream (101) from a data stream transmitter (214) to a data stream receiver (215) by means of discrete multitone symbols (208), in which data (123) to be transmitted a...
04/15/2008
7352824Multilevel pulse position modulation for efficient fiber optic communication
Decreasing the average transmitted power in an optical fiber communication channel using multilevel amplitude modulation in conjunction with Pulse Position Modulation (PPM). This multilevel PPM method does not entail any tradeoff between decreased power per channel ...
04/01/2008
7346013Frequency domain equalization of communication signals
A system and method for estimating a channel spectrum. The method includes: (a) receiving an input signal from a channel, where the input signal includes one or more major echoes and zero or more minor echoes introduced by the channel; (b) identifying the one or mor...
03/18/2008
7330738Apparatus and method for canceling residual echo in a mobile terminal of a mobile communication system
An apparatus for canceling an echo signal in a mobile terminal of a mobile communication system. A double talk detector (DTD) receives a first signal by canceling an estimated echo signal from a signal received through a microphone, outputs the first signal, and out...
02/12/2008
7330500Adjustable electronic duplexer
A duplexer for a communication device having a transmission unit, a reception unit and a shared antenna is disclosed. The duplexer comprises a first signal path between the transmission unit and the reception unit, the first signal path comprises a filter unit filte...
02/12/2008
7330739Method and apparatus for providing a sidetone in a wireless communication device
A wireless communication device is disclosed that provides a sidetone to the device user. The device converts an outbound analog audio signal to an outbound audio bitstream from which a sidetone bitstream is extracted. The device also converts an inbound digital aud...
02/12/2008
7328001Traffic shaping of cellular service consumption through modification of consumer behavior encouraged by cell-based pricing advantages
Changes in wireless service user behavior are encouraged and produced to shape utilization patterns among cells within a rate plan region by using shaping rules which define potential discounts from a standard charge rate under certain cell-specific utilization cond...
02/05/2008
7310505Attenuation control for tuners
A tuner includes an RF input with a signal level controller such as an attenuator that is provided to attenuate a signal from the RF input. A tunable RF filter provides RF band limiting and determines simultaneously the AGC bandwidth. An amplifier with resistive fee...
12/18/2007
7308231Computer mouse with bluetooth hand-free handset
The invention discloses a computer input device with Bluetooth hand-free handset comprises: an electric source module, for providing power to the computer input device, comprising a voltage step-up circuit and a battery, in which the battery can be an one-time-batte...
12/11/2007
7295968Device and method for processing an audio signal
The invention concerns audio signal processing, comprising: a first processing of an audio source signal, using at least a mathematical transform applied on first sequences of samples obtained by applying first segmentation windows on the audio source signal; and a ...
11/13/2007
7295833Spam control for sharing content on mobile devices
Sharing content among users of mobile devices is facilitated and controlled by a system and method that employs a content sharing application to receive and process requests to share content among users of devices such as mobile devices and personal computers. Recip...
11/13/2007
7291007Valve ring gate for thermoplastic and thermoset injection molding
An injection molding machine having a first mold portion and a second mold portion. The second mold portion being movable relative to the first mold portion and together defining a mold cavity. The injection molding machine includes a fluid path extending through th...
11/06/2007
1              
 
Sign InRegister
Username  
Password   
forgot password?