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WO/2005/076663A1 |
A system (1) is described which is suited for suppressing audio distortion. The system comprises echo cancelling means g1, g2 coupled between an audio output (4) and a distorted desired audio sensing microphone array (3), and a filter ar...
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WO/2005/076662A1 |
A system (1) is described which is suited for suppressing audio distortion. The system comprises echo cancelling means g1, g2 coupled between an audio output (4) and a distorted desired audio sensing microphone array (3), and a filter ar...
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WO/2005/074602A2 |
A push-button hinge 20 for a handheld device 22. The hinge comprises an axially movable button 32 having a push surface 56 and a helical portion 62 for converting axial movement of the button to rotation, a helical follower 36 engaged wi...
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WO/2005/072043A2 |
An interface device (800) and a method for interfacing a mobile telephone (200) to a plurality of fixed telephones (300) for enabling a user to originate a call at one of said fixed telephones (300) either to a recipient located in the m...
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WO/2005/074156A1 |
Echo canceling method comprising the steps: a) receiving a first signal and a second signal, said second signal comprising an echo of the first signal, b) generating an echo replica signal by filtering the first signal with a finite impu...
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WO/2005/074236A1 |
Communication device keypad illumination. A mobile communication device (100, 600) can include a housing (110, 610) and a mobile communication device numeric keypad (120, 620) coupled to the housing, the mobile communication device numer...
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WO/2005/071934A1 |
An adaptive filter is programmed with an algorithm based on a normalized Least Mean Squares (nLMS) algorithm that adapts each sample time. The algorithm is modified to be more efficient in a variety of DSPs by computing multiple errors, ...
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WO/2005/070146A2 |
A headphone receiver apparatus (10) for use with low power transmitters includes a pair of headphone speaker enclosures (14, 26) connected by a headband (28). An antenna element (32) in the form of a spring steel band or a plastic cable/...
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WO/2005/069239A1 |
The invention relates to a door signal device comprising a unit for the sound reproduction of digital sound signals, a memory for at least one digital sound sequence and a control unit for the reproduction of the sound signal during an i...
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WO/2005/067654A2 |
A personal audio set formed that includes an ear-clip mounting portion (14) pivotally secured to a frame (16) is disclosed. In one embodiment, the frame of the personal audio set included a sliding portion to define a first axis of rotat...
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WO/2005/064908A1 |
The present invention relates to an audio communication system and method with improved acoustic characteristics. The present invention utilizes the Haas effect to simulate a sound picture that gives a better subjective impression of ste...
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WO/2005/062595A1 |
The present invention relates to an audio communication system and method with improved acoustic characteristics. A stereo detector is introduced in the echo cancellator of the system. When stereo in far-end audio is detected, converging...
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WO/2005/060583A2 |
A double talk activity detector (30) and method for an echo canceler circuit (10) improves the probability of detecting a double talk condition based on at least pre-echo canceler uplink data (40). The echo canceler circuit (10) includes...
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WO/2005/060582A2 |
A downlink activity and double talk probability detector and method for an echo canceler circuit (10) improves the stability of an echo canceler adaptive filter (300) and improves the attenuation of post-echo canceler uplink data (388). ...
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WO2005002183B1 |
This invention describes a statistical adaptive-filter controller for digital acoustic echo control in hands-free telephones for achieving more consistent echo cancellation results (i.e. higher output signal quality) and simpler realizat...
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WO/2005/053278A2 |
An interface device inserted in the telephone line between a data device and a fixed wireless terminal recognizes when the attached data device goes off-hook in order to send a string-command message and signal the fixed wireless termina...
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WO/2005/050622A1 |
A method and apparatus for reducing echo in a communication system are provided. A first signal including a voice component associated to a speaker is received. The first signal is processed to derive a harmonic feature of the voice comp...
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WO/2005/048572A2 |
Embodiments of the invention provide a small and economical two-way communications device that has both an excellent echo-cancellation function that substantially suppresses echoes over the entire frequency range and an excellent voice-o...
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WO/2005/048578A1 |
A telephone call processing arrangement establishes a path between a called switching center and an audio content server in response to receipt of an incoming call to a subscriber. A preselected audio presentation is transmitted from the...
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WO/2005/046194A1 |
Disclosed is a device for processing an input signal comprising a number of sub-signals which are allocated to discrete transmitting and receiving units that are disposed in predetermined geometrical positions relative to a space. The in...
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WO/2005/046076A1 |
A transmission signal u (t) after echo cancellation by an echo canceller (1) is band-divided and a ratio of an echo component for a signal component of each band is estimated by ratio estimation means. An echo suppression amount eg (n) i...
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WO/2005/041543A1 |
A headset (16) for communication with a device (10, 20) configured for processing audio signals captured by the headset (16) to detect user speech and transmitting, to the device (10, 20), sampled representations of the captured audio si...
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WO/2005/039234A2 |
A protective cover assembly (14) including a metal foil (20) with perforations (21), and a treatment on one or more surfaces of said metal foil. The treatment is a hydrophobic or oleophobic treatment, or both. The protective cover assemb...
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WO/2005/036922A1 |
In accordance with the teachings described herein, a communication headset with signal processing capabilities is provided. A radio communications circuitry may be included to communicate wirelessly with a communications device. A speake...
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WO/2005/034577A1 |
The present invention relates to a method and apparatus for improving interference suppression processing and control in hearing aids (310) communicating with a mobile station (350) over a short-range wireless network. The hearing aid (3...
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WO/2005/031707A1 |
Method for encoding an acoustic signal (y(n)) containing a speech component (s(n)) and an echo component (e(n) by using an analysis through synthesis method, wherein for encoding the acoustic signal is compared with a synthesised signal ...
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WO/2005/031706A1 |
Method for transmitting speech parameters representing an acoustic signal being encoded by an analysis through synthesis method wherein at least a part of the speech parameters are selected from fixed gains for describing the acoustic si...
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WO/2005/022876A1 |
Device and method for measuring a talking quality of a communication link in a communications network (10). The device comprises measurement means (22; 31, 36) connected to the communication link, which are arranged to subject a degraded...
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WO/2005/011248A1 |
The invention relates to a system for the digital processing of an acoustic signal, arranged in a telephone set provided with a loudspeaker (28) and a microphone (27), between said loudspeaker and said microphone. The aforementioned syst...
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WO/2005/011234A2 |
An echo canceler includes an recursive least squares lattice to whiten a far-end signal s1(t) and provide whitened time delays. The echo canceler further decorrelates a microphone signal based on the whitened time delays to reduce echoes...
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WO/2005/011274A1 |
A doorphone system comprising a slave unit (10) installed as a user interface for a visitor (VS), and a master unit (20) installed as a user interface for a resident (RS) and communicating with the slave unit (10) by transmitting/receivi...
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WO/2005/011139A1 |
In order to reduce noise in telecommunications made over unshielded twisted pair (UTP) of metallic conductors an active electronic circuit for a two-to-four wire hybrid circuit reduces common mode signals without recourse to inductive co...
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WO/2005/008916A1 |
Disclosed is a wireless repeater including an echo canceller unit capable of efficiently canceling a n echo signal that a n emitted signal by a transmission antenna is re-inputted to a receiving antenna and an echo cancellation method. A...
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WO/2005/008910A1 |
[PROBLEMS] A speech communication apparatus not only for preventing echo suppression capability from degrading even when the positional relationship between a speaker and a microphone is changed but also for allowing a high quality speec...
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WO/2005/002184A2 |
This invention discloses an improvement to a digital Acoustic Echo Control (AEC) in hands-free telephones. It describes an additional adaptive filter referred to as a residual echo filter, which is placed after the usual echo canceller a...
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WO/2004/112370A1 |
The invention relates to a method and device for processing echo between at least two communications devices in order to attenuate, in a signal received by a communications device comprising at least one microphone, the components of a s...
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WO/2004/110031A2 |
Managing line power for network elements in an access network. In one embodiment a current sense system in a line power network is disclosed. The current sense system includes a power supply, a splitter and a sense circuit. The power sup...
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WO/2004/109439A2 |
A method of managing power at an element management system for power sourcing and power sinking network elements of an access network. The method includes identifying a set of primitives for managing power usage at the power sinking netw...
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WO/2004/107724A2 |
A two way sound reproduction system, such as a mobile phone system has an input (2) for an incoming far end signal (W), a loudspeaker (5), a D-to-A-converter (3) between the input (2) and the loudspeaker (5), a microphone (7), a A-to-D (...
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WO/2004/107588A2 |
A method and apparatus for transmitting and receiving RF signals for broadband communications using power lines as communication medium. A super-heterodyne structure is used to translate the signals from one frequency to another so as to...
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WO/2004/105357A2 |
A telephone includes a transmit channel and a receive channel, each including a bank of sub-band filters having a VAD coupled one to each sub-band filter. Each VAD measures the spectral energy in a sub-band, compares the spectral energy ...
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WO/2004/105370A1 |
An interphone has an interphone operation unit (102), an interphone transmitter/receiver (50), and a communication control unit (101) for connecting the interphone operation unit (102) to a telephone circuit. The interphone operation uni...
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WO/2004/105371A1 |
A microphone circuit includes a first microphone, a second microphone, an adjustable delay unit, and a combiner. The first microphone generates a first microphone signal that includes a contribution associated with an output signal that ...
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WO/2004/100602A2 |
The invention is directed to a method comprising receiving input signals emanating from at least two microphone arrays each comprising at least two microphones, processing the input signals of each microphone array by a beamformer to det...
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WO/2004/098088A2 |
A method and apparatus for reducing crosstalk in a multi-channel communication system is disclosed. In one embodiment, outgoing signals (302) in a multi-channel environment are manipulated into a transform domain (416), such as the frequ...
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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...
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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. ...
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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...
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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...
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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...
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