Matches 1 - 50 out of 70 1 2 >


Match Document Document Title
8971522 Noise reduction  
A method of reducing noise in an acoustic system, the method comprising at a first user terminal: receiving an audio signal from at least one further user terminal over a network; executing a...
8812313 Voice activity detector, voice activity detection program, and parameter adjusting method  
Judgment result deriving means 74 makes a judgment between active voice and non-active voice every unit time for a time series of voice data in which the number of active voice segments and the...
8774397 Telephone and voice adjustment method for telephone  
A telephone includes: a housing; a voice output device that is placed inside the housing and produces voice; a contact detection unit that detects a position of an object that contacts the...
8744067 System and method of adjusting the sound of multiple audio objects directed toward an audio output device  
Embodiments of the present invention include methods and apparatuses for adjusting audio content when more multiple audio objects are directed toward a single audio output device. The amplitude,...
8649484 Apparatus, methods, and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains  
Apparatus, methods and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains are disclosed. A disclosed example method includes determining a model...
8615075 Method and apparatus for removing noise signal from input signal  
A method for removing a noise signal from an input signal that is received. In the method, the amount of energy of the input signal is detected, a noise signal included in the input signal is...
8594319 System and method of adjusting the sound of multiple audio objects directed toward an audio output device  
Embodiments of the present invention include methods and apparatuses for adjusting audio content when more multiple audio objects are directed toward a single audio output device. The amplitude,...
8565415 Gain and spectral shape adjustment in audio signal processing  
A signal processing system enhances communication. When an audio signal is detected, an echo component of the detected audio signal may be estimated. A near party communication device may receive...
8462962 Sound processor, sound processing method and recording medium storing sound processing program  
A sound processor includes a conversion unit converts a reference sound signal corresponding to a base of sound to be output and an observation sound signal based on each of sound signals output...
8363789 Apparatus, methods, and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains  
Apparatus, methods and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains are disclosed. A disclosed example method includes determining a model...
8363820 Headset with whisper mode feature  
Systems and methods for operating a telecommunications device in whisper mode are presented. The method generally includes adjusting a transmit audio signal gain responsive to a transmit audio...
8280450 Hands-free phone-call device and tone quality control device  
Constant phone-call quality is kept irrespective of setting of a tone adjusting function of a cellular phone under connection. There is provided a sound collector for collecting voices and...
8238548 Controlling echo during double-talk in a voice conference  
An echo canceller apparatus comprises a receive side attenuator coupled in a receive side signal path that is configured to couple from a conference call bridge to a caller; a convolution...
8130939 Maintaining convergence of a receiver during changing conditions  
In one embodiment, the present invention includes an apparatus having an automatic gain control (AGC) stage to receive an input signal from a communication channel physical medium, a first local...
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...
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....
8031862 Voice mail apparatus and control method thereof  
According to one embodiment, a voice mail apparatus is connectable to a telephone exchange, records a voice message sent from a caller telephone terminal in a mail box corresponding to each...
7827433 Time-multiplexed routing for reducing pipelining registers  
Serializing circuitry is provided that can multiplex multiple device output signals and that can drive time-multiplexed data signals on the bus wires of a data path of an electronic system. Bus...
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...
7752482 Hybrid parallel/serial bus interface  
A hybrid serial/parallel bus interface has a data block demultiplexing device. The data block demultiplexing device has an input configured to receive a data block and demultiplexes the data block...
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...
7409195 Wireless modem  
A modem includes a base unit for transmitting a data signal, and a communication card which receives the data signal from the base unit over a wireless medium and which performs echo canceling on...
7272224 Echo cancellation  
A method, apparatus, system, and signal-bearing medium that in an embodiment determine a degree of correlation between a speaker output signal and a microphone input signal and modulate an...
7233659 Message playback concurrent with speakerphone operation  
A digital telephone answering device having speakerphone capability allows a recorded message to be played back and heard by the far-end party as well as over the local speakerphone by the...
7190769 Apparatus for controlling operation of a recording device with a telephone instrument  
An apparatus for controlling operation of a recording device with a telephone configured for orientation in a first state and a second state includes: (a) an information conveying section for...
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...
7142665 Automatic gain control for an adaptive finite impulse response and method therefore  
Methods and apparatus are provided for an echo cancellation system. The echo cancellation system comprises an automatic gain control (AGC), a first scalar, a second scalar, a signal summing stage,...
7092514 Audibility enhancement  
An apparatus for enhancing audibility of a far-end speech signal from a far-end user to a near-end user in a telephony system includes a near-end background noise signal level estimator (26) at...
7092513 Limiting maximum gain in duplex communications devices including telephone sets  
Duplex communication methods and systems with maximum gain limiting such as in telephone handsets and speaker phones are disclosed. The communications system such as a telephone set may generally...
7085371 Push-button signal receiving device and a gain control method  
A push-button signal receiving device and a gain control method whereby error in validity determination of a received signal that accompanies the insertion of an AGC circuit can be prevented. An...
7079645 Speaker volume control for voice communication device  
A system and method for adjusting the volume level of a communications device in response to ambient noise. In one embodiment, ambient noise is sampled once and the volume of a speaker associated...
7006624 Loudspeaker volume range control  
The present invention relates to a loudspeaker volume control arrangement for a telephone having a loudspeaker and a microphone which controls the loudspeaker volume of the telephone based on 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...
6925172 Line interface with gain feedback coupled matching impedance  
A transceiver system is disclosed for use in a telecommunication system. The transceiver system includes a transmission circuit including a transmitter input coupled to an input of a transmission...
6795549 Drive circuit  
Driver circuit for driving voice and data signals from a switching center via a subscriber line (38) to a subscriber terminal, having: a controllable voice signal driver (12) which has a high...
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...
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...
6760435 Method and apparatus for network speech enhancement  
An apparatus for enhancing intelligibility of a voice signal in a noisy environment includes a first noise estimator which estimates a far-end noise component from the far-end signal, and a second...
6711259 Method and apparatus for noise suppression and side-tone generation  
An audio processing module, in accordance with the invention, includes an input for receiving input signals. A side tone generator is included for receiving the input signals and for generating a...
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...
6691073 Adaptive state space signal separation, discrimination and recovery  
This invention unifies a set of statistical signal processing, neuromorphic systems, and microelectronic implementation techniques for blind separation and recovery of mixed signals. A set of...
6671371 Adaptive transmit amplifier  
An adaptive transmit amplifier for automatically adjusting the transmit output characteristics of a headset adapter output stage includes a detector adapted to detect a value of a bias current in...
6570985 Echo canceler adaptive filter optimization  
The Least Mean Square (LMS) and Normalized LMS (NLMS) algorithms commonly employed in adaptive filters of echo cancelers are further optimized. Finite impulse response (FIR) filters are used to...
6519339 Method of regulating power transfer across an isolation barrier  
An efficient method and circuitry for transferring various levels of power across a high voltage isolation barrier. In one embodiment of the invention, a data access arrangement (DAA) is provided...
6370245 Full duplex communication circuits with bilateral T hybrid and balanced impedance configurations  
Full duplex circuits provide a bi-directional signal path at one port for transmit and receive signals and also provide separation between the transmit and receive signals at their respective...
5940499 Voice switch used in hands-free communications system  
A voice switch in a hands-free communications system performs selective attenuation with respect to respective voice signals being transmitted and received in respective transmitting and receiving...
5857019 Apparatus and method for providing a telephone user with control of the threshold volume at which the user's voice will take control of a half-duplex speakerphone conversation  
An improved speakerphone that may be viewed as a modification of a conventional half-duplex speakerphone that includes transmit and receive attenuators for alternatively isolating either a speaker...
5790679 Communications terminal having a single transducer for handset and handsfree receive functionality  
A wireless terminal for personal communication systems is provided with selective handsfree or handset receive mode of operation utilizing a single transducer. The transducer is mounted within a...
5768398 Signal amplification system with automatic equalizer  
A signal amplification system wherein a signal coming from a microphone is applied to a loudspeaker via a signal processing system. The signal processing system includes an estimator for...
5627501 Signal coupler with automatic common line attenuation compensation  
The present invention relates to a for coupling Plain Old Telephone Service (POTS) signals and Asymmetric Digital Subscriber Line (ADSL) signals to a common line (TL). In order to avoid saturation...

Matches 1 - 50 out of 70 1 2 >