Stereophonic spatial expansion circuit with tonal...

Details Stereophonic spatial expansion circuit with tonal... Stereophonic spatial expansion circuit with tonal...

2005-09-20

2005-09-20

Tran, Sinh (Department: 2644)

Electrical audio signal processing systems and devices

Binaural and stereophonic

C381S002000, C381S017000

Reexamination Certificate

active

06947564

ABSTRACT:
In a stereophonic expansion circuit, the (L+R) sum signal is spectrally modified by increasing the bass and treble frequencies relative to the midrange so as to compensate for a midrange frequency boost in the (L−R) difference signal. The stereophonic expansion effect and manipulation of the signal parameters are produced by active matrixing amplifiers.

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