H - Electricity – 04 – S
Patent
H - Electricity
04
S
H04S 3/02 (2006.01)
Patent
CA 2392601
Various equivalent adaptive audio matrix arrangements are disclosed, each of which includes a feedback-derived control system that automatically causes the cancellation of undesired matrix crosstalk components in the matrix output. Each adaptive audio matrix arrangement includes a passive matrix that produces a pair of passive matrix signals in response to two input signals. A feedback- derived control system operates on each pair of passive matrix signals, urging the magnitudes of pairs of intermediate signals toward equality. Each control system includes variable gain elements and a feedback and comparison arrangement generating a pair of control signals for controlling the variable gain elements. Additional control signals may be derived from the two pairs of control signals for use in obtaining more than four output signals from the adaptive matrix.
L'invention concerne différents systèmes d'adaptation d'équivalence de matrice audio, dont chacun comporte un dispositif de commande dérivé d'une rétroaction provoquant automatiquement l'annulation de composantes parasites indésirables de la sortie de matrice. Chacun de ces systèmes comporte une matrice passive produisant une paire de signaux de matrice passive en réaction à deux signaux d'entrée. Un dispositif de commande dérivé d'une rétroaction exerce une action sur chaque paire de signaux de matrice passive, ce qui consiste à solliciter les intensités de paires de signaux intermédiaires vers une égalité. Chaque dispositif de commande comprend des éléments de gain variable, ainsi qu'un système de rétroaction et de comparaison générant une paire de signaux de commande servant à commander les éléments de gain variable. On peut dériver des signaux de commande supplémentaires à partir des deux paires de signaux de commande afin d'obtenir davantage de quatre signaux de sortie à partir de la matrice adaptative.
Dolby Laboratories Licensing Corporation
Smart & Biggar
LandOfFree
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