发明名称 |
Anordnung zum Demodulieren von Sprachsignalen, welche diskontinuierlich von einer mobilen Einheit übertragen werden |
摘要 |
<p>The disclosure is to eliminate discomforting background noise regenerated at a receive side (viz., a base station) in a mobile radio communications system wherein discontinuous transmission (DTX) is utilized. When speech pause is detected at the receive side, synthesis filter coefficients are produced using a background noise code which has been transmitted from a mobile unit. Subsequently, a Q value of the synthesis filter is measured using the above-mentioned synthesis filter coefficients. If the Q value is larger than a threshold level, each of the filter coefficients is lowered by a predetermined value. Thus, the regenerated discomforting background noise can effectively be reduced. <IMAGE></p> |
申请公布号 |
DE69322588(T2) |
申请公布日期 |
1999.05.06 |
申请号 |
DE1993622588T |
申请日期 |
1993.10.12 |
申请人 |
NEC CORP., TOKIO/TOKYO, JP |
发明人 |
HAYATA, TOSHIHIRO, C/O NEC CORPORATION, TOKYO, JP |
分类号 |
G10L19/06;G10L11/02;G10L19/00;G10L21/02;H04B1/46;H04B14/04;(IPC1-7):G10L5/00;G10L5/06;G10L7/00;G10L7/08;G10L7/04;G10L9/06;G10L9/00 |
主分类号 |
G10L19/06 |
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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