Audio circuitry for dynamics reduction
AssigneeRed Chip Company Ltd.
InventorsUli Behringer, Jan Duwe
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Abstract
A circuit for processing an audio signal includes an input stage to which the audio signal is applied and an output at which the processed audio signal is presented. The circuit comprises first and second input stages (11, 12) having nonlinear performance curves, the first stage receiving the audio signal at a specified phase, and the second stage receiving from an inverter (13) an inverse phase of the audio signal. A positive half wave of the input signal is processed nonlinearly and the negative half wave is processed linearly. A difference amplifier (14) receives the signals produced by the first and second input stages and generates an audio signal representing a difference between the signals present at its inputs.
Claims10
A circuit for processing an audio signal including an input stage for receiving the audio signal and an output for presenting a processed audio signal, comprising:
- a signal source providing the audio signal having positive and negative wave portions;
- first and second input stages having substantially identical nonlinear performance curves, the first input stage receiving the audio signal, and the second input stage receiving an inverse of the audio signal, the first and second input stages further including control points that are selected such that of the positive and negative wave portions, one of the portions is processed substantially nonlinearly and the other of the portions is processed substantially linearly;
- and
- a difference amplifier receiving the processed portions from the first and second input stages and producing the processed audio signal.
Dependencies are inferred from the claim text.