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Patent Searching and Data


Matches 601 - 650 out of 14,269

Document Document Title
WO/2004/095823A1
A conference call arrangement, conferencing device, conference unit and a method of managing conference calls. The conferencing device may be a speakerphone with a speak up indicator. Whenever a conference call attendee does not speak lo...  
WO/2004/093328A2
A bidirectional amplifier circuit (100) includes first (102) and second (104) input ports, first (106) and second (108) output ports, a power amplifier (110), and first (112), second (114), third (116), and fourth (118) filter circuits. ...  
WO2003020006A8
A circuit for determining an angular direction of an acoustic source relative to a reference direction comprises an uni-directional microphone (12), an omni-directional microphone (20), and a background noise suppression circuit (11).  
WO/2004/086814A1
An echo prevention circuit is configured in such a manner that in a telephone receiving part (11) of one communication device (1), second amplifiers (A2,A3) connected to respective speakers (SP1,SP2) are provided separately from an ampli...  
WO/2004/086555A2
The present invention provides a printed circuit board omni directional antenna. The omni directional antenna includes power dissipation elements. The power dissipation elements reduces the impact the power feed to the radiating elements...  
WO/2004/082249A1
The present invention discloses an improved audio echo canceller processing echo, noise and near end talk in a narrower, but still intelligible, frequency band for reducing required processing power and complexity. In a preferred embodim...  
WO/2004/077806A1
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 back-ground noise signal level estimator (26) at the near-end user. A near-end speech signa...  
WO/2004/077804A1
A server (1) includes a database (1c) for recording a member telephone number correlated with a dedicated telephone number set for each member and a caller telephone number detection device (1d) for detecting a telephone number of a user...  
WO/2004/077801A1
A device and a method for detecting presence of service on a telephone line prior to and during activation of alternative service on the line. The method comprises performing a first voltage detection on a subscriber line (S20), activati...  
WO/2004/066107A2
Stacking of Digital Subscriber Line Access Multiplexers (DSLAMs) is accomplished in multiple communications schemes using a master DSLAM (12) having a control circuit (24) and an uplink communication circuit (26) to a central office and ...  
WO/2004/064365A1
The present invention relates to a suppression device for an arrangement for the transmission of audio signals, in particular uttered speech, having: an echo reduction unit (4), which is arranged between an input channel (1) for receivin...  
WO/2004/064366A1
The invention relates to an echo canceling device and method for an arrangement for transmitting audio signals, in particular uttered speech with an echo filter for canceling echo. The echo filter is arranged between an input channel (1)...  
WO/2004/059962A1
Disclosed is a method for suppressing (10) echo (z(t)) in uplink data (y(t), 12-16) originating from a terminal (2, 3), said method allowing a delay and a decrease in quality during echo suppression of uplink data originating from a wire...  
WO2004015961A3
A bulk delay (tbd) estimating circuit correlates time intervals representing a signal (11) with time intervals representing an echo (12) of the signal to identify the echo and estimate bulk delay. Bulk delay is estimated by computing (1,...  
WO/2004/055996A2
A fault associated with a communication medium (134) is analyzed by correlating a first set of information indicative of echo associated with the communication medium (134) with a second set of information indicative of echo. The fault i...  
WO/2004/054127A1
This device for cancelling an echo generated by a telecommunication unit located on a first end of a connection, comprises: a first adaptive filtering unit (36; 56) outputting an echo estimate, controlled by a first error signal (E¿MCC1...  
WO2004004297A3
An audio enhancement system (1) for speech recognition or voice control is described, comprising a signal input for carrying a distorted desired signal (z), a reference signal input, and a spectral processor (SP) coupled to both signal i...  
WO/2004/045244A1
Abstract ADAPTIVE NOISE CANCELING MICROPHONE SYSTEM An adaptive noise canceling microphone system for extracting a desired signal, in particular a desired speech signal, comprising two microphones being arranged at a predefined distance ...  
WO/2004/045194A1
A system and a method selectively switch between two different voltage supplies supplying a common node (211). A first of the voltage supplY (212) is connected to common node (211) via switch (202). A second voltage supply (214) is coupl...  
WO2003020006A3
A circuit for determining an angular direction of an acoustic source relative to a reference direction comprises an uni-directional microphone (12), an omni-directional microphone (20), and a background noise suppression circuit (11). Th...  
WO/2004/039049A1
An efficient reduction for the time delay during echo correction in a telecommunications network is made possible by a method for reducing an echo in uplink data (19 to 22) that are issued from a terminal (2, 3) of a telecommunications n...  
WO/2004/036889A1
A combined processor, such as might be used in a mobile handset or hands-free communication device, provides residual echo suppression and noise reduction while eliminating the need for explicit comfort noise generation. Operating within...  
WO2002080126A9
A hospital bed, patient/nurse call system, and a hospital network are provided. Communication is provided over a packet based communication network.  
WO/2004/030333A1
The invention relates to a communication terminal comprising a signal receiving path comprising a bandwidth expansion device (Abt) for the artificial expansion of a bandwidth of a reception signal of the communication terminal, a digital...  
WO/2004/025937A1
A full duplex telephone set for hearing impaired users includes a digital signal processor incorporating a pair of adaptive transversal filters to cancel line and acoustic echo feedback from the tip and ring signals of the set, and to co...  
WO/2004/021167A1
The invention relates to an audio board with digital input/outputs, RS 232 and Ethernet access. Audio interfaces which can be connected to telecommunication systems and the like are known in many cases of application. Said interfaces, ho...  
WO/2004/015961A2
A bulk delay (tbd) estimating circuit correlates time intervals representing a signal (11) with time intervals representing an echo (12) of the signal to identify the echo and estimate bulk delay. Bulk delay is estimated by computing (1,...  
WO/2004/014055A1
A speech processing system includes an echo canceller 100 with a first input for receiving a first input signal from a microphone and a second input for receiving a second signal to be cancelled from the first input signal. The echo canc...  
WO2002060156A3
An audio signal (31) is divided into a plurality of bands (32, 33, 34, 35, 36) prior to generating a shadow. The shadow is created by delaying the portion of the audio signal in at least one band by less than fifty milliseconds and combi...  
WO/2004/012426A1
The invention provides a cellular telephone or other communications device with intelligence to manage speakerphone operation to more nearly approximate normal conversation, even when using a one-way only transmission mode. The microphon...  
WO/2004/008731A1
An interference canceller is described, comprising an adaptive filter for modeling an interference, such as an echo or noise, and a spectral processor for processing the modeled interference together with near end speech and the interfer...  
WO2002065662A9
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 amplifier, a receiver circuit including a...  
WO/2004/004298A1
The invention concerns an echo processing device for attenuating in a return signal Y2n echo components of a direct signal X1n, comprising reception and transmission gain Grn, Gen computing means (36); first gain applying means (10) for ...  
WO/2004/004297A2
An audio enhancement system (1) for speech recognition or voice control is described, comprising a signal input for carrying a distorted desired signal (z), a reference signal input, and a spectral processor (SP) coupled to both signal i...  
WO/2004/002127A1
An echo canceller (1) is described, which has dedicated non stationary echo cancelling properties. The non stationary echo could be estimated directly, or indirectly by subtracting the stationary echo determined by a stationary noise est...  
WO2003039115A3
The present invention relates to a device and method for carrying out acoustic echo cancellation (2) when playing back C-channel audio signals on a D-channel audio signal transmission system with C
WO2003065693A3
Voice activity is detected by comparing an analog signal (11) with two voltage thresholds (15, 16) and producing data (18) representing the energy of the signal. The data, in binary form, is compared with thresholds to determine voice ac...  
WO2002065662A3
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 amplifier, a receiver circuit including a...  
WO/2003/100372A1
The invention concerns a method in a digital network system (27) for controlling the transmission of terminal equipment (10). Terminal equipment (10) includes a PTT (Push-to-Talk) function in order to at least activate the transmission t...  
WO/2003/094486A1
Sub-band filtering (41, 42), adaptive echo cancellation (62), and residual echo suppression (53, 63) are selectively and separately applied in hierarchical order under the control of a circuit that monitors four separate signals (A, B, C...  
WO/2003/092255A1
The invention relates to a virtual audio bandwidth extender, and more particularly a device for increasing the perceived bandwidth of audio signals in equipment having limited bandwidth, especially in mobile telephones. The invention als...  
WO/2003/088636A1
A video doorphone for identifying a visitor who has carried out a call operation at the door of a house. The visibility by a person in the house and the crime preventablity at the call−answer are improved. When a visitor depresses a ca...  
WO/2003/088637A1
The invention relates to a communications device (1) for transmitting acoustic signals in a motor vehicle. Said communications device comprises at least two transmitters and at least two receivers for transmitting and emitting acoustic s...  
WO/2003/077738A1
A digital Laryngoscope is a Laryngoscope design that incorporates the lates optical and digital technology for a reliable and consistent method of visualization and exposure of anatomical structures required for Endotracheal intubation. ...  
WO/2003/077594A1
A howling control device and a howling control method for controlling the time until the howling suppression release according to the howling generation condition, thereby eliminating repetition of howling suppression and release. A sign...  
WO/2003/071738A1
The present invention relates to a possibility to localize a telecommunications terminal over a local area network. More specifically, the invention provides a method for associating a port number of a powering equipment to which will be...  
WO/2003/065703A1
Voice activity detectors (81, 83, 85, 87), individually weighted, are provided at each input and each output of a telephone (80) for reliably controlling echo cancelling circuitry within the telephone. Voice activity is detected by compa...  
WO/2003/065693A2
Voice activity is detected by comparing an analog signal (11) with two voltage thresholds (15, 16) and producing data (18) representing the energy of the signal. The data, in binary form, is compared with thresholds to determine voice ac...  
WO/2003/061258A1
In a speakerphone system (46&semi and 70), the signal that is directed to a loudspeaker (58) is filtered by a dynamically controllable highpass filter (50). The filter characteristics are adjusted on the basis of the power of the signal ...  
WO/2003/061152A1
A method and apparatus are disclosed for canceling acoustic echo generated during transmission of text information in a communication system supporting a TTY/TDD service. When an mobile-to-land call is established between a mobile subscr...  

Matches 601 - 650 out of 14,269