Detection of voice activity in an audio signal
AssigneeNokia Corporation
InventorRiitta Niemisto
Life of this patent
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Abstract
A device comprising a voice activity detector for detecting voice activity in a speech signal using digital data formed on the basis of samples of an audio signal. The voice activity detector comprises a first element adapted to examine whether the signal has a highpass nature. The voice activity detector also comprises a second element adapted to examine the frequency spectrum of the signal. The voice activity detector is adapted to provide an indication of speech when the first element has determined that the signal has a highpass nature or the second element has determined that the signal does not have a flat frequency response.
Claims30
A device comprising a voice activity detector for detecting voice activity in a speech signal using digital data formed on the basis of samples of an audio signal, the voice activity detector of the device comprising:
- a first element adapted to examine, whether the signal has a highpass nature;
- and
- a second element adapted to examine the frequency spectrum of the signal;
- wherein the voice activity detector is adapted to provide an indication of speech when one of the following conditions is fulfilled:
- the first element has determined that the signal has a highpass nature;
- or
- the second element has determined that the signal does not have a flat frequency response.
A voice activity detector for detecting voice activity in a speech signal containing noise using digital data formed on the basis of samples of an audio signal, the voice activity detector comprising:
- a first element adapted to examine, whether the signal has a highpass nature;
- and
- a second element adapted to examine the frequency spectrum of the signal;
- wherein the voice activity detector is adapted to provide an indication of speech when one of the following conditions is fulfilled:
- the first element has determined that the signal has a highpass nature;
- or
- the second element has determined that the signal does not have a flat frequency response.
A system comprising a voice activity detector for detecting voice activity in a speech signal containing noise using digital data formed on the basis of samples of an audio signal, the voice activity detector of the system comprising:
- a first element adapted to examine, whether the signal has a highpass nature;
- and
- a second element adapted to examine the frequency spectrum of the signal;
- wherein the voice activity detector is adapted to provide an indication of speech when one of the following conditions is fulfilled:
- the first element has determined that the signal has a highpass nature;
- or
- the second element has determined that the signal does not have a flat frequency response.
A method for detecting voice activity detector in a speech signal containing noise using digital data formed on the basis of samples of an audio signal comprising:
- examining, whether the signal has a highpass nature;
- examining the frequency spectrum of the signal;
- and
- providing an indication of speech when one of the following conditions is fulfilled:
- it is determined that the signal has a highpass nature;
- or
- it is determined that the signal does not have a flat frequency response.
A computer program product comprising machine executable steps for
- detecting voice activity detector in a speech signal containing noise using digital data formed on the basis of samples of an audio signal, examining, whether the signal has a highpass nature;
- examining the frequency spectrum of the signal;
- and
- providing an indication of speech when one of the following conditions is fulfilled:
- the signal has a highpass nature;
- or
- the signal does not have a flat frequency response.
Dependencies are inferred from the claim text.