Audio control using auditory event detection
AssigneeDolby Laboratories Licensing Corporation
InventorsBrett G. Crockett, Alan J. Seefeldt
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Abstract
In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
Claims12
A method for processing an audio signal in an audio processing apparatus, the method comprising:
- receiving the audio signal, the audio signal comprising at least one channel of audio content;
- dividing the audio signal into a plurality of subband signals with an analysis filterbank, each of the plurality of subband signals including at least one subband sample;
- deriving a characteristic of the audio signal, wherein the characteristic is a power measure of the audio signal;
- smoothing the power measure to generate a smoothed power measure of the audio signal;
- detecting a location of an auditory event boundary by monitoring the smoothed power measure, wherein an audio portion between consecutive auditory event boundaries constitutes an auditory event,
- generating a gain vector based on the location of the auditory event boundary;
- applying the gain vector to a version of the plurality of subband signals to generate modified subband signals;
- and
- synthesizing the modified subband signals with a synthesis filterbank to produce a modified audio signal,
- wherein the audio processing apparatus is implemented at least in part with hardware.
An audio processing apparatus, the apparatus comprising:
- an input interface for receiving the audio signal, the audio signal comprising at least one channel of audio content;
- an analysis filter bank for dividing the audio signal into a plurality of subband signals, each of the plurality of subband signals including at least one subband sample;
- a processor that:
- derives a characteristic of the audio signal, wherein the characteristic is a power measure of the audio signal;
- smooths the power measure to generate a smoothed power measure of the audio signal;
- detects a location of an auditory event boundary by monitoring the smoothed power measure, wherein an audio portion between consecutive auditory event boundaries constitutes an auditory event,
- generates a gain vector based on the location of the auditory event boundary, and
- applies the gain vector to a version of the plurality of subband signals to produce modified subband signals;
- and
- a synthesis filterbank that combines the modified subband signals to produce a modified audio signal.
Dependencies are inferred from the claim text.