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Match Document Document Title
8059806 Method and system for managing a communication session  
A method and system for managing a communication session is provided. The communication session is associated with multiple communication devices. The method includes learning (304) a set of...
8045721 Dynamic distortion elimination for output audio  
A method (200) for improving quality of output audio (126). The method can include detecting an output acoustic signal (128) and generating a receive audio signal (134) based, at least in part, on...
8041025 Systems and arrangements for controlling modes of audio devices based on user selectable parameters  
Methods and arrangements for controlling modes of audio devices according to user selectable features are disclosed. The system can receive a user selection for an alternate mode for audio device....
7996215 Method and apparatus for voice activity detection, and encoder  
A method and an apparatus for Voice Activity Detection (VAD) and an encoder are provided. The method for VAD includes: acquiring a fluctuant feature value of a background noise when an input signal...
7940921 Continuous power transfer scheme for two-wire serial link  
The invention provides a single digital communication link between system-side and line-side circuitry in a DAA, capable both of carrying data signals and of transferring a substantial amount of...
7778407 Statistical approach to automatic gain control for managing audio messages over a network  
A system, method, and apparatus are directed towards managing an audio message, such as a Voice over Internet Protocol (VOIP) message over a network. The invention employs a statistical mechanism...
7756265 On-board hands-free communication apparatus  
In an on-board hands-free communication apparatus, a gain of an amplifier of a speaker for outputting an incoming voice signal from a telephone device varies with a volume set value of a speaker...
7742592 Method and device for removing echo in an audio signal  
Acoustic echo control and noise suppression is an important part of any “handsfree” telecommunication system, such as telephony or audio or video conferencing systems. Bandwidth and com...
7684831 Signal processing device and hands-free call device  
A signal processing device includes: a speaker amplifier for amplifying a reception voice; a reception voice attenuator for attenuating the reception voice inputted to the speaker amplifier during...
7660408 Attenuation and termination circuit using impedance synthesis  
The present invention discloses circuits for isolating and attenuating signals generated by a telephone network. In disclosed embodiments, a metering pulse signal is isolated from the terminals of...
7522065 Method and apparatus for proximity sensing in a portable electronic device  
A portable electronic device that automatically detects its mode of use and alters a characteristic of its user interface to match the mode of use. A mobile telephone is described as an example of...
7430412 Digitally programmable continuously variable precision microwave attenuator  
An apparatus (10) is disclosed for testing a receiver (18). The apparatus (10) includes a digitally controlled attenuator (30) and controls, including a programmable logic device (38), to control...
7310420 Telephone headset amplifier with noise blanking capability  
The present invention is directed most particularly to wireless communication systems for interconnection with telephone systems, and more particularly to methods and apparatus to suppress unwanted...
7286663 Asymmetric digital subscriber line system capable of automatically controlling receipt gain and method thereof  
A digital communication system includes a transmitter and a receiver and communicates on telephone line. Receipt gain of the digital communication system is controlled in accordance with the...
7263184 Method and apparatus for active reduction of speakerphone singing  
In a speakerphone device identification of signals (i.e., voice input or speaker output) in a process for reducing acoustic feedback, in a communication device, is accomplished by adding a...
7248690 Voice signal clipping circuit and telephone set therewith  
A voice signal clipping circuit comprising, an amplifier which amplifies an input voice signal to a permissible level and a clipper which clips an amplitude component in excess of the permissible...
7218695 Method and device for acquiring an estimated value dependent on the maximum of a single-frequency signal  
The invention relates to a method and device for estimating an estimated value (U2max) dependent on the maximum (Umax) of a single-frequency signal sampled via a succession of sampled values...
7215761 Information processing terminal, operation content notifying program and method for operation content notifying  
An information processing terminal of the present invention notifies a user that a call receiving sound-level set by operating a rotary operation unit provided on a main body of the information...
7177417 Telephone handset with user-adjustable amplitude, default amplitude and automatic post-call amplitude reset  
The present invention is directed to a telecommunication device, usable with standard telecommunication equipment, that automatically resets one or more acoustic parameters to predetermined levels...
7139393 Environmental noise level estimation apparatus, a communication apparatus, a data terminal apparatus, and a method of estimating an environmental noise level  
A level of a sound signal including a voice signal and an environmental noise signal is detected and a level (power level) is sampled in response to a clock signal. It is detected whether the...
7113580 Method and apparatus for performing conferencing services and echo suppression  
The present invention provides a method and apparatus for providing conferencing services in a converged services platform operable to perform a variety of enhanced telecommunications services. The...
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...
7075921 Remote media control for voice over internet telephony and related applications  
A person receiving a Voice over IP call, such as a call center agent, remotely controls media settings on a caller's multimedia terminal device functioning as a telephone terminal device. In some...
7046792 Transmit/receive arbitrator  
The amplitudes of a signal on the microphone input of a telephone and a signal on the line input of the telephone are compared with each other and with two thresholds. The comparisons are sampled...
7042986 DSP-enabled amplified telephone with digital audio processing  
A DSP-enabled system and method for increasing intelligibility of audio on amplified telephones by providing digital audio processing customizable based on characteristics of hearing loss specific...
6973181 Method of generating a ring signal in a subscriber line interface circuit technical field  
In a method and a device for controlling the magnitude of the generated ring signal in a the Subscriber Line Interface Circuit (SLIC) the voltage of the A and B lines to the subscriber from the...
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...
6952471 Handset proximity muting  
Apparatus and methods for automatically (i.e., without requiring manual user adjustment) reducing gain in one or both acoustic feedback paths of a cordless telephone when the handset and its base...
6944287 Portable terminal  
A radio terminal is disclosed which can be switched into a talking mode simply when a telephone call terminates while sound data of music or the like is being played back and besides can assure a...
6856683 Method for reducing noise from a non-linear device that shares a customer loop with an asymmetric digital subscriber line modem  
A method for reducing noise from a non-linear device, such as a telephone, that shares a customer loop with a splitterless Asymmetric Digital Subscriber Line modem. The non-linearity of the device...
6834107 Telephone apparatus  
The volume of a loudspeaker in a telephone is automatically adjusted according to the ambient noise at the telephone location. During a predetermined time window which exists during the initial...
6829352 Amplifier arrangement  
Amplifier arrangement comprising: a resistive receive hybrid means adapted to pass a combination of a received signal and a transmitted signal,a resistive transmit hybrid means adapted to pass...
6819760 Adaptive energy detector gain control in physical layer transceiver for home telephone wire network  
A novel physical layer transceiver is provided for receiving data transmitted via residential wiring. The transceiver includes an input circuit for receiving an incoming pulse signal, and an energy...
6807262 Central office control of receive and transmit handset volume  
A switch based feature that allows subscribers to adjust their incoming or outgoing audio signal strength. The value of the transmit or receive pad values on the subscriber line card are adjusted...
6795547 Full duplex speaker-phone providing increased loop stability  
A full duplex speaker-phone that performs adaptive filtering to provide increased loop stability between users of the speaker-phone. The invention employs a sliding filter that performs adaptive...
6771771 Method and device for echo cancellation  
An echo canceling device includes a first variable amplifier for variably amplifying an audio signal input through a microphone according to a control signal; a first analog-to-digital converter...
6768795 Side-tone control within a telecommunication instrument  
A side-tone control unit for a telecommunication instrument is configured to include a side-tone amplifier having a transfer function selectively controlled in accordance with a set of amplifier...
6728373 Differential output stage for electronic equipment providing a remote power feed to a terminal  
The stage includes two channels each connecting an input to an output. Each channel includes a first device for adding to the input voltage of the channel concerned a feedback voltage from the...
6718034 Headset interface  
The present invention concerns an adaptive headset interface for amplification and adjustment of signals between a random headset and a random terminal. The adaptive headset interface comprises...
6711258 Apparatus and method for controlling a volume in a digital telephone  
The present invention relates to an apparatus and a method for volume control in digital telephones such as second generation mobile telephone terminals, third generation IMT 2000 image mobile...
6704415 Echo canceler  
An echo canceler makes it possible to adaptably control a power of speech reception voice and to reduce distortion of a voice output from a speaker. The echo canceler has a basic structure includes...
6690790 Receiving section of a telephone with suppression of interference upon switching on/off  
A telephone receiving section having a final stage, an electroacoustic transducer having a first terminal connected to the ground of the circuit, a unit for controlling switching on/off, a source...
6564072 Radio telecommunication terminal  
The invention relates to a mobile radio terminal including an audio transducer (5) an outlet (6) of which is oriented towards the front face of the terminal and provides earpiece, loudspeaker and...
6539091 Apparatus for sidetone damping  
An apparatus for sidetone damping can be used in telephones configured for hands-free operation. The apparatus has a reception branch with a speaker and a transmission branch with a microphone. An...
6507297 System and method for variable gain coder-decoder  
A variable gain coder-decoder is provided. The variable gain coder-decoder includes a variable gain amplifier in which the amplification gain may be adjusted in one-decibel steps. An analog to...
6504926 User control system for internet phone quality  
In an Internet telephony system, personal computers are interconnected by means of the Internet to transmit and receive voice sounds detected by microphones connected to the personal computers....
6434220 Long-distance transmission system and device  
A long-distance transmission system includes a network terminal that accommodates terminal equipment, and a line terminal connected to the network terminal via a two-wire metallic subscriber line....
6421443 Acoustic and electronic echo cancellation  
A transmitted signal is coupled through a coarse delay and a fine delay to one input of a correlator. Another input of the correlator is coupled to a received signal. The delays are adjusted for...
6408070 Method and apparatus for echo control in a communication system  
The invention relates to an acoustic echo canceller particularly well suited for use in a hands-free terminal or teleconference system. The echo canceller is designed to assess the inherent signal...
6385253 Method and apparatus for reliable reception of VDSL signals  
The present invention encompasses the reception of a Very High Speed Digital Subscriber Line (VDSL) signal from a twisted wire pair drop cable and an amplification circuit for compensating losses...
Matches 1 - 50 out of 206 1 2 3 4 5 >