LOW FREQUENCY MANAGEMENT FOR MULTICHANNEL SOUND REPRODUCTION SYSTEMS

The present invention relates generally to sound reproduction systems and methods and more specifically to the reproduction of low-frequency signal components recorded in a Low Frequency Effects (LFE) channel. According to the invention there is provided a system comprising: n input channels (1, 2, 3) for receiving multichannel sound signals; at least one input channel (4) for receiving a low-frequency effects (LFE) signal; n output channels (13, 14, 15) for providing signals from the system to respective transducers, such as loudspeakers (31, 32, 33); for each of said input channels (I1 2, 3) high-pass filter means (5, 6, 7) receiving a signal from said respective input channel (I, 2, 3) and providing a corresponding high-pass filtered signal (22, 23, 24) to a respective second summing means (16, 17, 18); for each of said input channels (1, 2, 3) low-pass filter means (8, 9, 10) receiving a signal from said respective input channel (1, 2, 3) and providing a corresponding low-pass filtered signal to first summing means (12); for said at least one input channel (4) for receiving a low frequency effects (LFE) signal, gain means (I I) receiving said low frequency effects (LFE) signal and providing an output signal (35) to said first summing means (12); for each of said output channels (13, 14, 15) LFE signal processing means (19, 20, 21) each receiving a signal from said first summing means (12) and each providing a processed output signal to said respective second summing means (16, 17, 18); where each of said second summing means (16, 17, 18) has an output connected to each of said output channels (13, 14, 15); whereby each of said output channels (13, 14, 15) provides processed output signals for each of said transducers, such as loudspeakers (31, 32, 33), respectively. D'une manière générale, la présente invention concerne des systèmes et des procédés de reproduction sonore et de manière plus spécifique la reproduction de composantes de signaux basse fréquence enregistrés dans une voie à effets de basse fréquence (LFE). L'invention concerne un système comportant : n voies d'entrée (1, 2, 3) pour la réception de signaux sonores multivoie; au moins une voie d'entrée (4) pour recevoir un signal à effets basse fréquence (LFE); n voies de sortie (13, 14, 15) pour fournir des signaux provenant du système à des transducteurs respectifs, tels que des haut-parleurs (31, 32, 33); pour chacune desdites voies d'entrée (1, 2, 3) des moyens de filtre passe-haut (5, 6,