Dolby Laboratories Licensing Corporation

Dolby International Ab

Jyri Tapani Pakarinen

Heiko Purnhagen

Michael John Smithers

Juan Felix Torres

A device () and a method are proposed for tuning a frequency-dependent attenuation stage (), with the purpose of suppressing non-linear distortion occurring in an audio reproduction system () associated with the frequency-dependent attenuation stage. The device comprises a receiving section () adapted to receive data representing an output acoustic signal () from the audio reproduction system, recorded upon excitation of the audio reproduction system by a predetermined input data signal ()first distortion detection section () adapted to detect presence of non-linear distortion based on the received data and to apply psycho-acoustic compensation to the detected non-linear distortion and a control section () adapted to determine, based on the psycho-acoustically compensated non-linear distortion, control information () suitable for controlling the frequency-dependent attenuation stage.

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Solna, Sweden

Jyri Tapani Pakarinen