发明名称 |
METHOD FOR SPEECH CODING UNDER BACKGROUND NOISE CONDITIONS |
摘要 |
<p>A method of coding speech under background noise conditions wherein during active voice speech segments an analysis-by-synthesis method is used. However, when a background noise segment is detected, an adaptive code book (pitch prediction) contribution is used as a source of a pseudo-random sequence in order to provide a better representation of the background noise. An improved gain quantization scheme is also employed when a background noise segment is detected, wherein an energy of the total excitation with quantized gains is matched to an energy of total excitation with unquantized gains.</p> |
申请公布号 |
EP1048024(B1) |
申请公布日期 |
2002.09.25 |
申请号 |
EP19980959615 |
申请日期 |
1998.11.25 |
申请人 |
CONEXANT SYSTEMS, INC. |
发明人 |
SU, HUAN-YU;YUEN, ERIC, KWOK, FUNG;BENYASSINE, ADIL;THYSSEN, JES |
分类号 |
G10L19/012;G10L19/12;H03M7/30;(IPC1-7):G10L19/00 |
主分类号 |
G10L19/012 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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