H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 29/00 (2006.01) H04R 27/00 (2006.01) H04H 5/00 (2006.01)
Patent
CA 2335486
The signal in each channel of a stereo is modulated at an inaudible frequency by a replica of the original signal. The modulated signal is broadcast into a room by a loudspeaker (48) and is picked up by a microphone (41). The microphone is coupled to the stereo, which includes a demodulator (51) for separating the replica from the signal as received at the microphone. By comparing (56, 66) the replica with the original signal, data is extracted to compensate for the acoustic characteristics of the loudspeaker and the room in which the loudspeaker is located.
Le signal dans chaque canal d'un équipement stéréophonique est modulé à une fréquence inaudible par une réplique du signal original. Le signal modulé est radiodiffusé dans une pièce au moyen d'un haut-parleur (48) et capté par un microphone (41). Le microphone est couplé à l'équipement stéréophonique, lequel inclut un démodulateur (51) pour séparer la réplique du signal tel que capté par le microphone. Une comparaison (56, 66) de la réplique et du signal original, permet d'extraire des données pour compenser les caractéristiques acoustiques du haut-parleur et de la pièce dans laquelle ce dernier est installé.
Acoustic Technologies Inc.
Borden Ladner Gervais Llp
LandOfFree
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