Configurable filter for processing television audio signals
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United States of America Patent
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May 26, 2009
Grant Date -
Oct 20, 2005
app pub date -
Mar 24, 2005
filing date -
Mar 24, 2004
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Abstract
A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix 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. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.
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