Remote conference apparatus and sound emitting/collecting...

H - Electricity – 04 – R

Patent

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H04R 3/00 (2006.01) H04R 1/40 (2006.01)

Patent

CA 2629801

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.

La présente invention concerne un dispositif de téléconférence comprenant un réseau de haut-parleurs et des réseaux de microphones disposés aux deux extrémités du réseau de haut-parleurs. Une pluralité de foyers sont définis devant les réseaux de microphones respectifs et en symétrie par rapport à la ligne médiane du réseau de haut-parleurs. Un flux de rayons de réception d'ondes sonores est produit vers les foyers. Le calcul d'une différence entre les rayons de réception vers les foyers symétriques par rapport à la ligne médiane permet d'annuler une composante acoustique qu'un microphone reçoit du réseau de haut-parleurs (SPA). En outre, un total de carrés de valeur de grandeur d'onde de la différence à un instant donné sert à estimer le foyer qui est le plus proche. Enfin, la comparaison des totaux des carrés des valeurs de grandeur d'onde des rayons de réception vers les foyers mutuellement symétriques permet d'évaluer la position du haut-parleur.

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