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US 8,428,270 B2Granted
Audio gain control using specific-loudness-based auditory event detection
AssigneeDolby Laboratories Licensing Corporation
InventorsBrett Graham Crockett, Alan Jeffrey Seefeldt
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Abstract
In one disclosed aspect, dynamic gain modifications are applied to an audio signal at least partly in response to auditory events. In another aspect, an input channel is divided into auditory events by detecting changes in a measurable characteristic of the input signal with respect to time.
Claims22
A method for processing an audio signal, the method comprising:
- monitoring a characteristic of the audio signal with respect to time;
- identifying a change in the characteristic that exceeds a threshold;
- setting an auditory event boundary to demarcate the change in the characteristic,
- wherein an audio segment between consecutive auditory event boundaries constitutes an auditory event;
- and
- applying a dynamic gain modification to the audio signal based in part on an occurrence of an auditory event.
3 more elements
A method in which a processor receives an input signal and generates an output signal, comprising:
- detecting changes in a measurable characteristic of the input signal with respect to time;
- identifying a change in the measurable characteristic of the input signal that exceeds a threshold;
- classifying a location in the input signal near the change as an auditory event boundary, wherein an audio segment between consecutive auditory event boundaries constitutes an auditory event;
- generating one or more dynamically-varying parameters in response to the auditory event;
- and
- applying a gain modification to the input signal based on the one or more dynamically-varying parameters to generate the output signal.
3 more elements
Dependencies are inferred from the claim text.