Sub-harmonic generator and stereo expansion processor

Details Sub-harmonic generator and stereo expansion processor Sub-harmonic generator and stereo expansion processor

2007-04-10

2007-04-10

Mei, Xu (Department: 2615)

Electrical audio signal processing systems and devices

Binaural and stereophonic

C381S017000, C381S061000

Reexamination Certificate

active

11053716

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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