Enhanced concert audio process utilizing a synchronized...

H - Electricity – 04 – R

Patent

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H04R 5/02 (2006.01) H04R 27/00 (2006.01) H04S 1/00 (2006.01)

Patent

CA 2242397

An audio enhancement system and method is provided wherein a wireless headphone system comprises a transmitter (40) and a receiver (30) including a synchronization device (109) which utilizes electromagnetic locating signals to locate the position of the receiver with respect to the transmitter. The transmitter for this system will broadcast a frequency modulated (FM) signal on a number of separate channels in the 900 MHz band range. Each channel will carry the same audio information, however, each successive channel will have its audio signal delayed by a preset time period, e.g., 50 ms, relative to the previous channel. The headset receiver (30), supporting position location signals, and associated hardware will select the appropriate channel depending on the listener's distance from the main loudspeakers. These channels are laid out such that when in a large venue, and if the proper channel is chosen, the sound received electronically over the wireless channel will be approximately in phase with the sound arriving to the listener from the main loudspeakers.

L'invention porte sur un système audio amélioré et le procédé associé consistant en un émetteur (40), et un récepteur (30) comportant un système de synchronisation (119) recourant à des signaux électromagnétiques pour localiser sa position par rapport à l'émetteur. Ledit émetteur émet un signal modulé en fréquence sur plusieurs canaux séparés dans la bande des 900 MHz. Chacun des canaux transmet la même information mais chacun des canaux successifs voit son signal audio retardé d'un temps donné (par exemple 50 ms) par rapport au canal précédent. Le récepteur (30) du casque d'écoute, les signaux de localisation de position et l'équipement associé sélectionnent le canal approprié en fonction de la distance séparant l'auditeur des haut-parleurs principaux. Ces canaux sont disposés de manière à ce que, dans un lieu de réunion étendu, et pour autant que le canal approprié soit choisi, le son reçu par radio soit sensiblement en phase avec le son parvenant directement des hauts parleurs principaux.

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