H - Electricity – 04 – S
Patent
H - Electricity
04
S
H04S 1/00 (2006.01) H03G 5/18 (2006.01) H04R 3/04 (2006.01)
Patent
CA 2098319
An audio signal processor (10, 12, 14) is disclosed for correcting harmonic and phase inaccuracies caused by the transduction, recording and playback of live audio signals. Operational amplifiers with fast slew rates and large bandwiths are used to implement a simple but effective circuit that can be reduced to a single chip. Signal phase is continuously and automatically shifted as a logarithmic function of frequency to compensate for differences in propagation velocities, thereby reducing the spatial smear that is inherent in conventional loudspeaker designs. Harmonic frequencies present during a live performance are regenerated by the signal processor to restore realism to the reproduced audio signal.
Processeur (10, 12, 14) de signaux audio permettant de corriger des imprécisions d'harmonique et de phase provoquées par la transduction, l'enregistrement et la lecture de signaux audio en direct. On utilise des amplificateurs opérationnels à vitesses de balayage rapides et à grandes largeurs de bande afin de constituer un circuit simple mais efficace pouvant se réduire à une seule puce. Une phase de signal est décalée en continu et automatiquement sous forme d'une fonction logarithmique de fréquence afin de compenser les différences dans les vitesses de propagation, réduisant ainsi la déformation spatiale inhérente au haut-parleur de conception classique. Les fréquences harmoniques se produisant lors d'une représentation en direct sont régénérées par le processeur de signaux afin de restituer le réalisme au signal audio reproduit.
Byrd Eldon A.
Mcfadden Fincham
LandOfFree
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