Patent ID: 7539316
Filing Date: 2009-05-26
Classification: H04S

Abstract:
1. A television audio signal encoder, comprising: a matrix configured to sum a left channel audio signal and a right channel audio signal to produce a sum signal, and to subtract one of the left and right audio signals from the other of the left and right signals to produce a difference signal; and a configurable infinite impulse response digital filter configured to selectively use one or more sets of filter coefficients to filter the difference signal, wherein each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission, wherein the configurable infinite impulse response digital filter includes a selector configured to select an input signal for said configurable infinite impulse response digital filter from a group of input signals, and wherein one input signal from the group of input signals includes an output signal of the configurable infinite impulse response digital filter.