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Patent Searching and Data


Matches 701 - 750 out of 14,267

Document Document Title
WO/2002/030099A1
The invention concerns a method for attenuating echo implemented in a multisensor (11¿m?) sound pick-up device (8) forming an antenna (10) and a sound reproduction device (12). The method consists in subjecting the signals y¿m?(t) outp...  
WO/2002/029567A1
An intra-vehicle communications system in a mining vehicle monitoring system. A status sensor (36), status radio transmitter (38) and power source (40) are located adjacent to a portion or component of the vehicle to be monitored and a s...  
WO/2002/025907A1
A virtual private branch exchange (VPBX) (115, 120) enables plural individuals to be associated with a single telephone number. When a call is received (6020), the VPBX retrieves a profile based on the called number (6030). The profile i...  
WO2000074362A3
Adaptive filtering algorithm training signals incorporate adaptation-enhancing signals having properties, such as spectral whiteness and rapidly decaying auto-correlation between samples, which allow the adaptive filtering algorithms to ...  
WO2001069371A3
According to the invention, at least one acoustic output is connected to at least one acoustic input of a computer appliance having a multiway acoustic output and input system. The acoustic signal that is guided via said connection is su...  
WO/2002/023755A2
Real and imaginary components of the discrete Fourier transform (DTF) of the residual echo in an acoustic echo cancellation system are separately estimated using mapping functions derived without an assumption of statistical independence...  
WO/2002/023880A1
A device (1), for remote door opening, comprises a door unit (2), with at least one signal generator (7) and a release mechanism. Furthermore, the device (1) comprises a remote control unit with a telephone receiver (3). The door unit (2...  
WO/2002/021807A2
A two-way communication device comprises a microphone (4) and a loudspeaker (8). THe device determines the volume at which the device reproduces the signals it receives, e.g. by the setting of a volume control (16) or via an energy level...  
WO2001010102A3
An echo cancellation device (ECD) comprises an echo canceller (EC) including a transfer function estimator (EST, H) and a subtractor (ADD) and a residual echo suppression device (G, ADD2). The residual echo suppression device (G) compris...  
WO/2002/021817A2
A method and system is provided for eliminating acoustical feedback in a system. The method determines a parameter for at least one notch filter, adjusting the notch filter based on the parameter, processing the digital signals through t...  
WO/2002/011414A2
The invention provides that when switching over between a hand-held operation (normal operation) and a hands-free talking operation, the loudness level is successively increased to a preset hands-free talking loudness. When switching ove...  
WO/2002/009434A1
The invention relates to an electronic digital door opener, comprising a digitization, recording and control block (2) that is connected between the street plate (1)and the interior plates (3, 3', 3''). Said block (2) has sound recording...  
WO/2002/003563A1
An echo suppressor for bi-directional communications includes an echo canceller and a residual echo suppressor having variable gain. The gain of the residual echo suppressor is controlled based on a characteristic, such as the estimated ...  
WO/2001/093554A2
A method is described, wherein multiple input signals are subjected to a combination process of adaptive beamforming and adaptive echo cancelling, and wherein for each of the input signals an individual processing history of adaptive ech...  
WO/2001/089184A1
A communications device employs noise-adaptive transmit signal gain that takes echo cancellation into account so that a remote listener engaged in conversation with a local user of the communications device is not subjected to overly lou...  
WO/2001/080595A1
An improved telephone system (10) over a single telephone line within a residence or other building is disclosed, supporting exchange features and enabling easy expansion for multiple external lines. The existing telephone wiring is used...  
WO/2001/080439A1
A hybrid echo suppresser and associated methods of use provide echo suppression in a bi-directional communications system, while minimizing desired-voice signal disruption. The hybrid echo suppresser includes a linear echo canceller (LEC...  
WO2001022601A3
An echo is cancelled from a composite signal (S2) by providing a coarse phase adjustement (COARSE, Fig. 1), a fine phase adjustment (FINE Fig. 1), an amplitude correction (41), and then subtracting (42) the phase shifted signal (S2') fro...  
WO/2001/069371A2
According to the invention, at least one acoustic output is connected to at least one acoustic input of a computer appliance having a multiway acoustic output and input system. The acoustic signal that is guided via said connection is su...  
WO2001013615A3
The invention relates to a method for transmitting voice signals within a building wherein structured cabling is provided. The cabling is especially provided with a switch device (3) that is connected to a plurality of connections (5) vi...  
WO/2001/060029A1
An external speakerphone accessory system (Fig. 11) for a telephone, such as a LAN telephone, which enables the telephone user to place the speakerphone in a location that is convenient for multiple users, and which is not necessarily co...  
WO/2001/059994A1
A LAN telephone (6) which makes voice telephone calls over a local area network (LAN) data network (1). Acoustic voice sounds are digitally encoded and transmitted as simultaneously receives LAN data packets and decodes them, translating...  
WO2000076081A3
In methods and apparatus for echo cancellation using sub-band adaptive filtering, the bandwidth of each of a number of sub-band analysis filters, as well as the bandwidth of each of a number of synthesis filters, is increased as compared...  
WO/2001/056263A1
A system and method for cancelling an echo signal. An input waveform is provided to an acoustic processor, and a determination is made whether the input waveform includes information representative of an echo signal. If the input wavefor...  
WO2000060830A3
The invention relates to a mobile telephone which so as to permit hands-free operation comprises means (11) for echo cancellation and means (12) for the dereverberation of the signal supplied by a microphone (2) of the mobile telephone. ...  
WO/2001/054296A1
A sound communication device comprises a control CPU to output a speaker amplification value corresponding to the speaker volume adjusted by a terminal user using a volume adjusting means and an echo processor to reduce the echo mixed in...  
WO2001003413A3
An interphone apparatus comprises two headphones (11) each associated with a microphone (12) and an electronic circuit (13) for sending on command the audio signal of each microphone to the headphone associated with the other microphone....  
WO2001002929A3
A communications system (8) transmits digital signals using a compression code comprising a plurality of parameters including a first parameter. The parameters represent an audio signal comprising a plurality of audio characteristics, in...  
WO2000070853A3
In handsfree communications devices including a linear echo or noise canceler, both analog and digital gain factors are adjusted in response to user volume control inputs, the analog gain factor being frozen during active communications ...  
WO/2001/050714A1
A telephone includes a first channel having a microphone input (71) and a line output (72), a second channel having a line input (73) and a speaker output (74), and each channel having a plurality of band pass filters (101, 104/102, 103)...  
WO2001001665A3
The present invention includes a communication system comprising a first transducer (106) that detects and converts external audio signals into internal electronic signals formatted to be compatible with internal operations of the commun...  
WO2000072564A3
The invention relates to a device for compensating echoes that are produced in a system which comprises at least one loudspeaker (1), a transmission room (3) affected by an echo and at least one microphone (2) (loudspeaker-room-microphon...  
WO2000076176A3
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 estimated distance between the microphone...  
WO/2001/045375A1
The invention relates to a real time processing and management method for canceling out the echo between a loudspeaker (HP) and a microphone (M) of a computer terminal. Said method consists of establishing the loudspeaker signal or the m...  
WO/2001/043413A1
The invention concerns a device for processing echo in a communication system at a terminal comprising a first transducer (4) and a second transducer (5), said echo processing device (1, 101, 201) itself including an adaptive echo cancel...  
WO2000077492A3
The invention provides a key system unit (106, 108, 110) comprising a first interface (204) suitable for connection to a plurality of local terminals (122) and a control unit (202) coupled to the first interface. The control unit is oper...  
WO/2001/035603A2
Echo canceling method including the steps of determining an Euclidean norm of an echo-replica signal, determining an Euclidean norm of an input signal, determining a gradient step size, correcting the coefficients of an adaptive filter, ...  
WO/2001/026339A1
A complementary comb filter (12) includes a plurality of band pass filters (13-17) and a plurality of notch filters (21-25), wherein the notch filters have the same center frequencies as the band pass filters or the same center frequenci...  
WO/2001/026352A1
A low pass limited, low frequency pseudo-random noise signal (16) is added (13) to the input signal (11) for tagging the input signal in order to facilitate correlation with an echo.  
WO/2001/022601A2
An echo is cancelled from a composite signal (S2) by providing a coarse phase adjustement (COARSE, Fig. 1), a fine phase adjustment (FINE Fig. 1), an amplitude correction (41), and then subtracting (42) the phase shifted signal (S2') fro...  
WO2000074350A3
To optimize the performance of a device, such as a mobile telephone, that may be coupled to any of a variety of hands-free adapters, each characterized by a particular quality of performance, the device receives self-identifying informat...  
WO2000065817A3
The invention relates to a hands-free device (1) of a telephone station with a sender signal attenuation device (15), a receiver signal attenuation device (17) and a attenuation control device (23). The inventive hands-free device has a ...  
WO/2001/019062A1
A communication device having residual echo suppression includes an echo canceller (22) and a residual echo system (50, 52). The echo canceller cancels (30) most of an echo of a far end signal found in a microphone signal and provides an...  
WO2000072556A9
A full duplex speakerphone system (48) and a method of detecting a valid near-end talker component within an outgoing signal utilize a near-talker estimator (50) that produces a near-talker energy estimate using a spectrum analysis. The ...  
WO2000056036A3
There is disclosed an audio terminal (10) and a method for operating in uncontrolled audio environments, the audio terminal (10) having an echo suppression unit (20) for reducing acoustic feedback (18). The echo suppression unit (20) inc...  
WO/2001/013615A2
The invention relates to a method for transmitting voice signals within a building wherein structured cabling is provided. The cabling is especially provided with a switch device (3) that is connected to a plurality of connections (5) vi...  
WO/2001/010102A2
An echo cancellation device (ECD) comprises an echo canceller (EC) including a transfer function estimator (EST, H) and a subtractor (ADD) and a residual echo suppression device (G, ADD2). The residual echo suppression device (G) compris...  
WO/2001/006745A1
A system for communicating messages over a network of computers in real time is described. The messages include broadcast audio or video data for delivery to multiple computers, and intercom audio or video data for delivery between compu...  
WO/2001/003316A1
A communications system (10) transmits a near end digital signal using a compression code comprising a plurality of parameters including a first parameter. The parameters represent an audio signal comprising a plurality of audio characte...  
WO/2001/003413A2
An interphone apparatus comprises two headphones (11) each associated with a microphone (12) and an electronic circuit (13) for sending on command the audio signal of each microphone to the headphone associated with the other microphone....  

Matches 701 - 750 out of 14,267