Microsoft Technology Licensing, LLC

Eric Lee Middleton

Jani Samuli Kuivalainen

Kevin Juho Venalainen

Chun Beng Goh

Christopher Ian Borowski

Dana William Bourke

A frequency-dependent signal limiter using a paired combination of a bandpass filter (or 'selection filter') and an attenuating equalizing filter (or “cutting filter”) limit the amount of distortion generated by an audio output device in an acoustic rendering system. A bank of one or more of these pairs in series can be used to limit selected frequencies identified as primary causes of distortion in the audio output device to specified levels that avoid distortion.

Limiting distortion of acoustic rendering

Techniques are described herein that are capable of adaptively modulating audio content based on background noise. For instance, a loudness difference between a loudness of the audio content and a loudness of the background noise is determined. The loudness of the audio content is compared to an upper loudness threshold. A modulation is selected from multiple modulations based on the loudness difference and/or the comparison. Subsequent outputted audio content is modulated using the selected modulation.

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Eric Lee Middleton