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US 2014/0369510 A1Published application
Adaptation of a classification of an audio signal in a hearing aid
AssigneeSiemens Medical Instruments Pte. Ltd.
InventorsRoland Barthel, Marko Lugger
Life of this patent
Estimating the term…
Abstract
A method determines the classification of an audio signal in dependence on a comparison of two difference sums of audio features over time periods of different length. Thus, an adequately exact yet quickly reacting adaptation of the classification in changing hearing situations is ensured. The method is advantageously used in a hearing aid. The audio signal is processed in different ways on the basis of the classification.
Claims13
1-13. (canceled)
A method for adapting a classification of an audio signal, which comprises the steps of:
- providing the audio signal;
- generating a temporal sequence of values of an audio feature of the audio signal;
- forming a temporal sequence of differences of consecutive values;
- summing the temporal sequence of differences to give a first sum over a first time period;
- summing the temporal sequence of differences to give a second sum over a second time period, being longer than the first time period;
- comparing the first sum with the second sum;
- and
- performing a change of the classification of the audio signal in dependence on the comparing step.
5 more elements
A method for classifying an audio signal, which comprises the steps of:
- providing the audio signal;
- generating a first value for an audio feature from the audio signal at a first time point;
- selecting a classification of the audio signal in dependence on the first value of the audio feature;
- generating a second value for the audio feature from the audio signal at a second time point;
- preparing a change of the classification by selecting a proposal for an adapted classification in dependence on the second value of the audio feature;
- generating a temporal sequence of values of the audio feature of the audio signal in an interval between the first time point and the second time point;
- forming a temporal sequence of differences of consecutive values;
- summing the temporal sequence of differences of consecutive values to give a first sum over a first time period;
- summing the temporal sequence of differences of consecutive values to give a second sum over a second time period, the second time period being longer than the first time period;
- comparing the first sum with the second sum;
- and
- performing a change of the classification according to a proposal for an adapted classification in dependence on a comparison.
9 more elements
A signal processor for classifying an audio signal, the signal processor comprising:
- an input interface for receiving the audio signal;
- a classification unit programmed to perform the steps of:
- provide the audio signal;
- generate a first value for an audio feature from the audio signal at a first time point;
- select a classification of the audio signal in dependence on the first value of the audio feature;
- generate a second value for the audio feature from the audio signal at a second time point;
- prepare a change of the classification by selecting a proposal for an adapted classification in dependence on the second value of the audio feature;
- generate a temporal sequence of values of the audio feature of the audio signal in an interval between the first time point and the second time point;
- form a temporal sequence of differences of consecutive values;
- sum the temporal sequence of differences of consecutive values to give a first sum over a first time period;
- sum the temporal sequence of differences of consecutive values to give a second sum over a second time period, the second time period being longer than the first time period;
- compare the first sum with the second sum;
- perform a change of the classification according to the proposal for the adapted classification in dependence on a comparison;
- and
- a classification output for outputting the classification.
12 more elements
A hearing aid, comprising:
- a microphone for providing an audio signal;
- a signal processor for classifying the audio signal, said signal processor containing:
- an input interface for receiving the audio signal;
- a classification unit programmed to perform the steps of:
- provide the audio signal;
- generate a first value for an audio feature from the audio signal at a first time point;
- select a classification of the audio signal in dependence on the first value of the audio feature;
- generate a second value for the audio feature from the audio signal at a second time point;
- prepare a change of the classification by selecting a proposal for an adapted classification in dependence on the second value of the audio feature;
- generate a temporal sequence of values of the audio feature of the audio signal in an interval between the first time point and the second time point;
- form a temporal sequence of differences of consecutive values;
- sum the temporal sequence of differences of consecutive values to give a first sum over a first time period;
- sum the temporal sequence of differences of consecutive values to give a second sum over a second time period, the second time period being longer than the first time period;
- compare the first sum with the second sum;
- perform a change of the classification according to the proposal for the adapted classification in dependence on a comparison;
- and
- a classification output for outputting the classification;
- an audio processor for processing the audio signal in accordance with a processing program in dependence on the classification of the audio signal;
- and
- an earphone for outputting a processed audio signal.
17 more elements
Dependencies are inferred from the claim text.