发明授权
US08417519B2 Synthesis of lost blocks of a digital audio signal, with pitch period correction
有权
合成数字音频信号的丢失块，具有音调周期校正
- 专利标题： Synthesis of lost blocks of a digital audio signal, with pitch period correction
- 专利标题（中）： 合成数字音频信号的丢失块，具有音调周期校正
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申请号： US12446264申请日： 2007-10-17
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公开(公告)号： US08417519B2公开(公告)日： 2013-04-09
- 发明人: Balazs Kovesi , Stéphane Ragot
- 申请人： Balazs Kovesi , Stéphane Ragot
- 申请人地址： FR Paris
- 专利权人： France Telecom
- 当前专利权人： France Telecom
- 当前专利权人地址： FR Paris
- 代理机构： Drinker Biddle & Reath LLP
- 优先权： FR0609227 20061020
- 国际申请： PCT/FR2007/052189 WO 20071017
- 国际公布： WO2008/096084 WO 20080814
- 主分类号： G10L21/02
- IPC分类号： G10L21/02 ; G10L19/14
摘要：
The present invention relates to signal modification before pitch period repetition for the synthesis of blocks lost on decoding digital audio signals. The effects of repetition of transitories, such as the plosives of a speech signal, are avoided by comparing the samples of a pitch period with those of the previous pitch period. The signal is modified preferentially by taking the minimum between a current sample (e(3)) of the last pitch period (Tj) and at least one sample (e(2−T0) of approximately the same position in the previous pitch period (Tj−1).
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