Stereophonic signal processing circuit

Details Stereophonic signal processing circuit Stereophonic signal processing circuit

1988-08-29

1989-06-20

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Center channel

381106, H04S 300

Patent

active

048415731

ABSTRACT:
A stereophonic signal processing circuit is designed to be provided with a pair of level compression circuits compressing peak levels of a pair of stereophonic input signals into 1/2 power each, an arithmetic mean circuit determining an arithmetic mean between a pair of output signals issued from the level compression circuits, and a level expansion circuit expanding a peak level of an output signal from the arithmetic mean circuit into the 2nd power of the level so that an output signal from the level expansion circuit is reproduced midway between individual reproducing positions of the pair of stereophonic input signals. A delay circuit may be connected between the arithmetic mean circuit and the level expansion circuit. The stereophonic signal processing circuit makes it possible to cause more fully the lateralization of a reproduced sound and can be fabricated at a low cost.

REFERENCES:
patent: 3952157 (1976-04-01), Takahashi et al.
patent: 4392019 (1983-07-01), Halliday
patent: 4685136 (1987-08-01), Latshaw
patent: 4736434 (1985-04-01), Filliman
patent: 4747142 (1988-05-01), Tofte

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