Non-parametric voice activity detection
First Claim
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1. A method of detecting a speech component signal in an audio signal, comprising:
- extracting from the audio signal information about a pitch period of the speech component signal without using information obtained from a speech coder;
extracting signal energy information from the audio signal; and
deciding whether the speech component signal is present in the audio signal based on the information about the pitch period and the signal energy information.
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Abstract
Speech or voice activity in an audio signal is defected without using a speech coder. Pitch period information and signal energy information are extracted from the audio signal, and a decision regarding the presence or absence of voice is made based on that information.
102 Citations
19 Claims
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1. A method of detecting a speech component signal in an audio signal, comprising:
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extracting from the audio signal information about a pitch period of the speech component signal without using information obtained from a speech coder; extracting signal energy information from the audio signal; and deciding whether the speech component signal is present in the audio signal based on the information about the pitch period and the signal energy information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for detecting a speech component signal in an audio signal, comprising:
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a pitch period detector which extracts from the audio signal information about a pitch period of the speech component signal without using information obtained from a speech coder; a signal energy detector which extracts signal energy information from the audio signal; and a decision section that is connected to said pitch period detector and to said signal energy detector and which decides whether the speech component signal is present in the audio signal based on the information about the pitch period and the signal energy information. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A mobile telecommunications terminal, comprising:
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a microphone for receiving an input audio signal;
a digitizer coupled to said microphone for digitizing the audio signal; andan apparatus coupled to said digitizer for detecting a speech component signal in the digitized audio signal, said apparatus including a pitch period detector which extracts from the digitized audio signal information about a pitch period of the speech component signal without using information obtained from a speech coder, a signal energy detector which extracts signal energy information from the digitized audio signal, and a decision section that is connected to said pitch period detector and to said signal energy detector and which decides whether the speech component signal is present in the digitized audio signal based on the information about the pitch period and the signal energy information.
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Specification