H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 21/233 (2011.01) H04N 21/439 (2011.01) G10L 19/00 (2006.01) H04N 5/60 (2006.01)
Patent
CA 2577395
A television audio signal encoder includes a device that sums a left channel audiosignal and a right channel audio signal to produce a sum signal. The device also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal The set of filter coefficients is applied to the difference signal by a single multiplier in a recursive manner to prepare the difference signal for transmission
L'invention concerne un encodeur de signaux audio de télévision comprenant un dispositif qui additionne un signal audio de canal gauche et un signal audio de canal droit pour produire un signal d'addition. Ledit dispositif soustrait également un de ces deux signaux à l'autre de ces deux signaux pour générer un signal de différence. L'encodeur comprend en outre un filtre numérique configurable à réponse impulsionnelle infinie qui utilise sélectivement un ou plusieurs groupes de coefficients de filtrage pour filtrer le signal de différence. Le groupe de coefficients de filtrage est appliqué au signal de différence par un multiplicateur unique, de manière récursive, pour préparer le signal de différence à des fins de transmission.
G. Ronald Bell & Associates
That Corporation
LandOfFree
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