发明名称 |
Speech bandwidth extension |
摘要 |
A common narrow-band speech signal is expanded into a wide-band speech signal. The expanded signal gives the impression of a wide-band speech signal regardless of what type of vocoder is used in a receiver. The robust techniques suggested herein are based on speech acoustics and fundamentals of human hearing. That is the techniques extend the harmonic structure of the speech signal during voiced speech segments and introduce a linearly estimated amount of speech energy in the wide frequency-band. During unvoiced speech segments, a fricated noise may be introduced in the upper frequency-band.
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申请公布号 |
US2002128839(A1) |
申请公布日期 |
2002.09.12 |
申请号 |
US20010022737 |
申请日期 |
2001.12.20 |
申请人 |
LINDGREN ULF;GUSTAFSSON HARALD |
发明人 |
LINDGREN ULF;GUSTAFSSON HARALD |
分类号 |
G10L19/08;G10L21/02;(IPC1-7):G10L13/00 |
主分类号 |
G10L19/08 |
代理机构 |
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代理人 |
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地址 |
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