Dynamic range restorer and method

Details Dynamic range restorer and method Dynamic range restorer and method

1997-06-17

2000-04-11

Chang, Vivian

Electrical audio signal processing systems and devices

Including amplitude or volume control

With amplitude compression/expansion

381118, H03G 700

Patent

active

060496169

ABSTRACT:
A method and an apparatus for restoration of dynamic range to electronically amplified acoustic signals. The apparatus includes in combination: (i) a first input for accepting electrical input signals; (ii) a first output for supplying the electrical input signals to a signal conditioning apparatus; (iii) a second input for accepting conditioned electrical input signals from the signal conditioning apparatus; (iv) a gain-controllable amplifier having a signal input coupled to said first input and an output coupled to a second output for providing dynamic range restored output signals; and (v) a first circuit, the first circuit for controlling gain of the gain-controllable amplifier such that the gain-controllable amplifier has maximum gain when the electrical input signal has a predetermined maximum value and such that the gain-controllable amplifier has minimum gain when the electrical input signal has a predetermined minimum value.

REFERENCES:
patent: 3602824 (1971-08-01), Rusch
patent: 4169219 (1979-09-01), Beard
patent: 4202238 (1980-05-01), Moog
patent: 4881047 (1989-11-01), Wallter, Jr.
patent: 5389730 (1995-02-01), Wachi
patent: 5394474 (1995-02-01), Hirai et al.

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