发明名称 |
Detection of periodicity information from an audio signal |
摘要 |
A waveform-based technique for generating periodicity information from an input signal includes generating a pre-processed signal by applying low pass and non-linear filtering to the input signal, wherein the pre-processed signal has highlighted speech pitch tracks. An adaptive threshold algorithm is applied to the pre-processed signal to generate a detection signal having waveform segments whose peaks are separated by a pitch period of the input signal. A period between peaks in the detection signal is determined that indicates the periodicity information. Information about the period between the peaks in the detection signal is then used to adapt a scaling value to be used by the adaptive threshold algorithm in a subsequent step. The periodicity information may be utilized in a voice activity detector in a telephonic communications system.
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申请公布号 |
US5970441(A) |
申请公布日期 |
1999.10.19 |
申请号 |
US19970917224 |
申请日期 |
1997.08.25 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON |
发明人 |
MEKURIA, FISSEHA |
分类号 |
G10L11/02;G10L11/04;(IPC1-7):G10L7/00 |
主分类号 |
G10L11/02 |
代理机构 |
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