发明名称 |
Verfahren und Vorrichtung für digitale Sprachkodierung mit Sprachsignalhöhenabschätzung und Klassification. |
摘要 |
A method and a device for speech signal digital coding are provided where at each frame there is carried out a long-term analysis for estimating pitch period d and a long- term prediction coefficient b and gain G, and an a-priori classification of the signal as active/inactive and, for active signal, as voiced/unvoiced. Period estimation circuits (LT1) compute such period on the basis of a suitably weighted covariance function, and a classification circuit (RV) distinguishes voiced signals from unvoiced signals by comparing long-term prediction coefficient and gain with frame-by-frame variable thresholds. <IMAGE> |
申请公布号 |
DE628947(T1) |
申请公布日期 |
1995.08.03 |
申请号 |
DE19940108874T |
申请日期 |
1994.06.09 |
申请人 |
SIP SOCIETA ITALIANA PER L'ESERCIZIO DELLE TELECOMUNICAZIONI P.A., TURIN/TORINO, IT |
发明人 |
CELLARIO, LUCA, TORINO, IT |
分类号 |
G10L19/04;G10L11/04;G10L11/06;G10L19/00;G10L19/08;(IPC1-7):G10L9/14;G10L5/02;G10L9/18;G10L5/06;G10L9/06 |
主分类号 |
G10L19/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|