发明名称 |
Bandwidth extension of bandlimited audio signals |
摘要 |
A system extends a bandwidth of bandlimited audio signals by analyzing bandlimited audio signals at a transmission cycle rate. The analyzer may obtain a bandlimited parameter at a transmission cycle rate. A mapping device or logic in the system obtains a wideband parameter based on the bandlimited parameter. An audio signal generator generates a highband and/or lowband audio signal based on the wideband parameter at the transmission cycle rate. In some systems, the bandlimited audio signal is analyzed at the transmission cycle rate. The highband and/or lowband audio signals and the combined wideband audio signal are generated at the transmission cycle rate.
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申请公布号 |
US7630881(B2) |
申请公布日期 |
2009.12.08 |
申请号 |
US20050229027 |
申请日期 |
2005.09.16 |
申请人 |
NUANCE COMMUNICATIONS, INC. |
发明人 |
ISER BERND;SCHMIDT GERHARD UWE |
分类号 |
G10L19/00;G10L21/02;G10L21/038 |
主分类号 |
G10L19/00 |
代理机构 |
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