Multiband programmable compression system

Details Multiband programmable compression system Multiband programmable compression system

1993-11-23

1996-01-30

Kuntz, Curtis

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381106, 381107, 381 682, H04R 2500

Patent

active

054886686

ABSTRACT:
An improved audio compressor of the type which is used in a hearing aid and having a programmable compression ratio is disclosed. In the preferred embodiment, the compressor includes a variable gain limiter which provides variable gain amplification of the input signal and as a further function of a programmable control signal. A feedforward circuit is disposed in parallel to the variable gain limiter and provides a fixed gain signal. The output of the limiter and the feedforward circuit are combined at a summing node, which serves as an output. The gain curve of the compressor defines a sigmoid function having a pivot midway between the upper and lower break points.

REFERENCES:
patent: 3631365 (1971-12-01), Dolby
patent: 3846719 (1974-11-01), Dolby

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