Sub-harmonic generator and stereo expansion processor
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United States of America Patent
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Apr 10, 2007
Issued Date -
N/A
app pub date -
Feb 8, 2005
filing date -
Jun 28, 2000
priority date (Note) -
Expired
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Abstract
Methods and apparatus may provide for one or more of: receiving an input signal containing frequencies from among a first range; filtering the input signal to produce a first intermediate signal containing frequencies from among a second range; producing a sub-harmonic signal from the first intermediate signal containing frequencies from among a third range, the third range of frequencies being about one octave below the second range of frequencies; canceling energy at at least some frequencies from among a fourth range of frequencies from a left channel signal of the input signal to produce at least a portion of a left channel output signal; and canceling energy at at least some frequencies from among a fifth range of frequencies from a right channel signal of the input signal to produce at least a portion of a right channel output signal.
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