Back to results
US 11,425,500 B2Granted
Apparatus for generating audio signal to compensate for missing components in the audio signal
AssigneeAsk Industries GmbH
InventorBenjamin Sellak
Life of this patent
Estimating the term…
Abstract
Apparatus for processing an audio signal including an audio processing device configured to process, evaluate and modify an audio signal.
Claims16
Apparatus for processing an audio signal comprising a number of samples to generate missing harmonics of low-frequency components in the audio signal, the apparatus comprising at least one audio processing device configured to:
- process the audio signal in a time-dependent representation of the audio signal;
- determine an interval between a first zero-crossing and a further zero-crossing of the audio signal;
- determine a first set of sample points in the interval, the first set of sample points comprising a number of sample points at first positions in the interval;
- determine a second set of sample points in the interval, the second set of sample points comprising a number of sample points at second positions in the interval;
- modify the audio signal in the interval, on basis of an audio signal modification rule, by changing positions of the sample points of the first set of sample points in the interval such that the position of each sample point of the first set of sample points is changed from its respective first position in the first set of sample points to its a second position in the second set of sample points;
- apply the modified audio signal interval to the respective interval of the original audio signal so as to generate a modified audio signal;
- wherein
- the at least one audio processing device is configured to modify the audio signal on the basis of the audio signal modification rule;
- wherein
- the audio signal modification rule is or comprises a tilting function, configured to tilt a zero-crossing tangent at the first zero-crossing or at the further zero-crossing of the audio signal in clockwise or counter-clockwise direction.
7 more elements
Method for processing an audio signal comprising a number of samples to generate missing low-frequency components in the audio signal, the method comprising:
- processing the audio signal in a time-dependent representation of the audio signal;
- determining an interval between a first zero-crossing and a further zero-crossing of the audio signal;
- determining a first set of sample points in the interval, the first set of sample points comprising a number of sample points at first positions in the interval;
- determining a second set of sample points in the interval, the second set of sample points comprising a number of sample points at second positions in the interval;
- modifying the audio signal in the interval, on basis of an audio signal modification rule, by changing positions of the sample points of the first set of sample points in the interval such that the position of each sample point of the first set of sample points is changed from a first position in the first set of sample points to a second position in the second set of sample points;
- applying the modified audio signal interval to the respective interval of the original audio signal so as to generate a modified audio signal;
- wherein
- modifying the audio signal is carried out on the basis of the audio signal modification rule;
- wherein
- the audio signal modification rule is or comprises a tilting function, configured to tilt a zero-crossing tangent at the first zero-crossing or at the further zero-crossing of the audio signal in clockwise or counter-clockwise direction.
7 more elements
Dependencies are inferred from the claim text.