Patent application number | Description | Published |
20080273716 | Feedback Sound Eliminating Apparatus - A control unit gives acoustic environment instruction data to a picked up sound directionality control unit and an adaptive filter. According to this, the picked up sound directionality control unit generates a picked up sound signal constituted by a predetermined picked up sound directionality. The adaptive filter detects the picked up sound directionality from the acoustic environment instruction data, and reads out the filter parameter corresponding to this picked up sound directionality, from a memory. The adaptive filter sets a delay coefficient and a filter coefficient of an FIR filter, and generates a pseudo echo signal by an impulse response with respect to the received sound signal. Based on an error signal obtained by subtracting the pseudo echo signal from the picked up sound signal by an adder, the adaptive filter sets a more optimum filter parameter, and generates the next pseudo echo signal. | 11-06-2008 |
20090016515 | COMMUNICATION CONFERENCE SYSTEM, VOICE CHANGING DEVICE, AND SIGNAL CONVERTING ADAPTOR - A communication conference system that enables users who have only a connecting unit via a telephone line network and users who have only an IP connecting unit to hold a talk session mutually without a need of an expensive dedicated conference server is provided. A talk session device | 01-15-2009 |
20090041283 | AUDIO SIGNAL TRANSMISSION/RECEPTION DEVICE - In an audio signal transmission/reception device that receives and emits sounds so as to perform transmission and reception of audio signals via communications, user operability can be improved and the size of a main unit can be reduced. It is equipped with a speaker array for arranging a plurality of speaker units, which are arranged on the lower surface of the main unit, and a microphone array for arranging a plurality of microphones, which are arranged on the side surface of the main unit in its longitudinal direction. Legs having hollow structures are attached to the main unit so as to support the main unit at a prescribed height above the mount surface (e.g., the surface of a desk) and to secure good sound emission characteristics of the speaker array. | 02-12-2009 |
20090052684 | AUDIO CONFERENCING APPARATUS - Microphones arranged in an array shape along a longitudinal direction are respectively formed in both the longitudinal side surfaces of a housing | 02-26-2009 |
20090052688 | REMOTE CONFERENCE APPARATUS AND SOUND EMITTING/COLLECTING APPARATUS - A speaker array and microphone arrays positioned on both sides of the speaker array are provided. A plurality of focal points each serving as a position of a talker are set in front of the microphone arrays respectively symmetrically with respect to a centerline of the speaker array, and a bundle of sound collecting beams is output toward the focal points. Difference values between sound collecting beams directed toward the focal points that are symmetrical with respect to the centerline are calculated to cancel sound components that detour from the speaker array to microphones. Then, it is estimated based on totals of squares of peak values of the difference values for a particular time period that the position of the talker is close to which one of the focal points, and the position of the talker is decided by comparing the totals of the squares of the peak values of the sound collecting beams directed to the focal points that are symmetrical mutually. | 02-26-2009 |
20090147967 | CONFERENCE APPARATUS - Microphone arrays, which are formed by arranging a plurality of microphones, are provided on a front side and a rear side of a housing, respectively. A virtual focus is set for each of the microphone arrays in a direction opposite to a direction in which sound is picked-up sound signals picked up by the plurality of microphones are delayed such that distances to the virtual focus are the same, and the delayed sound signals are synthesized. Therefore, sound in a sound-pickup area of a predetermined angle on each of the front side and the rear side can be picked up at a high level, and even though there is a noise source in areas other than the sound-pickup area, noise from the noise source is not picked up. | 06-11-2009 |
20090248408 | VOICE EMITTING AND COLLECTING DEVICE - A voice emitting and collecting device that is capable of picking up/outputting a voice emitted from a talker at a high S/N ratio by eliminating the influence of a diffracting voice despite a simple configuration is provided. A signal differencing circuit | 10-01-2009 |
20090252364 | VOICE SIGNAL TRANSMITTING/RECEIVING APPARATUS - A voice signal transmitting/receiving apparatus includes: a device body; a speaker array arranged in the device body and including a plurality of arrayed speaker units; and a microphone array arranged in the device body and including a plurality of arrayed microphones. By thus integrating the speaker array and the microphone array, it is possible to improve the operability of a user, to acquaint the user relatively easily with the error in the set position and to make the device compact. | 10-08-2009 |
20090274318 | AUDIO CONFERENCE DEVICE - A audio conference device capable of detecting a talker's direction exactly and collecting a sound emitted from this direction at a high signal S/N ratio is provided. A detecting beam generating portion | 11-05-2009 |
20090310794 | AUDIO CONFERENCE APPARATUS AND AUDIO CONFERENCE SYSTEM - To provide an audio conference apparatus and an audio conference system which can smoothly proceed with the audio conference by removing a recursion sound of the conference voice is achieved. An audio conference apparatus | 12-17-2009 |
20100165071 | VIDEO CONFERENCE DEVICE - A video conference device capable of suppressing a processing burden of an echo canceller in such a situation that speakers, microphones, and a camera are arranged in close vicinity of a monitor is provided. A preliminary filter portion | 07-01-2010 |
20100166195 | ACOUSTIC APPARATUS - An acoustic apparatus without increasing noise etc. even when plural directional microphones collect sounds from a place of the same distances is provided. Sound signals output from the microphone arrays are subjected to phase shift by phase shift circuits | 07-01-2010 |
20100166212 | SOUND EMISSION AND COLLECTION DEVICE - It is possible to provide a sound emission and collection device having a compact configuration and being capable of suppressing a wraparound sound from a speaker to a microphone and improving the S/N ratio. In the sound emission and collection device, a plurality of speakers ( | 07-01-2010 |
20100172514 | SOUND PROCESSING SYSTEM - A sound enhancement system is configured such that sound emitting and collecting apparatuses | 07-08-2010 |
20100220877 | Array speaker system and array microphone system - A plurality of speakers are linked in the present invention. The linked position of each speaker can be detected. Audio signal is input to any one of the master speakers. The master speaker synchronizes the other linked speakers, and supplies audio signals to other speakers. It also controls the delay quantity of the speaker unit of each speaker. For a single speaker, the apparent width of this array speaker system becomes twice the width, and the speaker unit spacing becomes one third the spacing. Consequently, the frequency band at which direction is controllable becomes enhanced. | 09-02-2010 |
20100322435 | Position Detecting System, Audio Device and Terminal Device Used in the Position Detecting System - A position detecting system is provided, which is capable of effectively preventing erroneous detection of audio to be measured. The position detecting system includes a terminal device that inputs an audio signal from an audio device and a microphone. The audio device sequentially inputs measurement audio signals that have been formed by two or more audio signals of different frequencies to a speaker and receives a notification signal, wherein the report signal indicates that the audio of the measurement audio signal has been collected from the terminal device. The audio device clocks a time t | 12-23-2010 |
20110019836 | SOUND PROCESSING APPARATUS - A sound emission and collection device includes a main housing and two sub-housings. In the main housing, a microphone array is provided. Microphone arrays are also provided in the sub-housings. Sound collection directions of the microphone arrays are outer directions which are opposite a side of the main housing. The sub-housings are rotatably connected to the main housing. The sound emission and collection device generates a plurality of collected sound beam signals MB | 01-27-2011 |
20110110526 | ACOUSTIC ECHO CANCELLER AND ACOUSTIC ECHO CANCELLATION METHOD - An adaptive filter generates a pseudo echo sound signal based on a sound emission sound signal. An adder subtracts the pseudo echo sound signal from a low band component of a collected sound signal, thereby generating a sound signal with a first-adjusted low band component. An echo spectrum estimation section estimates and calculates a frequency spectrum of a reverberation echo this time from a spectrum of the pseudo echo sound signal this time, a frequency spectrum of the preceding reverberation echo, and an update coefficient based on an audio environment. An adder subtracts the frequency spectrum of the reverberation echo and the frequency spectrum of stationary noise from a spectrum of the sound signal with the first-adjusted low band component. | 05-12-2011 |
20110200207 | AUDIO APPARATUS - The invention provides an audio apparatus which hardly causes a directivity to be lowered even in a case where a plurality of unidirectional microphones, each having a directivity toward a center of a housing of the apparatus, are embedded in a recessed part provided on an upper surface of the housing. Microphones | 08-18-2011 |
20110268287 | LOUDSPEAKER SYSTEM AND SOUND EMISSION AND COLLECTION METHOD - A loudspeaker system with a high degree of versatility, which, even when a microphone or a person speaking moves, can adequately response to the movement is provided. A plurality of linkage terminals | 11-03-2011 |
20120281854 | SOUND EMISSION AND COLLECTION DEVICE - A sound emission and collection device has a plurality of speakers ( | 11-08-2012 |
20140037081 | AUDIO CONFERENCE DEVICE - An audio conference device receives and emits sounds to perform transmission/reception of audio signals via communications. The device has a speaker array with a plurality of speakers arranged on the lower surface of an elongated main housing, and a microphone array with a plurality of microphones arranged on the side surface of the main housing along the longitudinal direction. Legs are attached to the main body to support the main housing at a prescribed height above the resting surface and to secure good sound emission characteristics of the speaker array. The device further controls directivity of the microphones. | 02-06-2014 |