发明授权
- 专利标题: Nonlinear filter for noise suppression in linear prediction speech processing devices
-
申请号: US920724申请日: 1997-08-29
-
公开(公告)号: US5913187A公开(公告)日: 1999-06-15
- 发明人: Paul Mermelstein
- 申请人: Paul Mermelstein
- 申请人地址: CAX Montreal
- 专利权人: Nortel Networks Corporation
- 当前专利权人: Nortel Networks Corporation
- 当前专利权人地址: CAX Montreal
- 主分类号: G10L19/04
- IPC分类号: G10L19/04 ; G10L21/02 ; G10L9/14
摘要:
The invention relates to a linear prediction audio signal processing apparatus, such as a vocoder, including a nonlinear filter to attenuate the residual signal used to excite a linear prediction synthesis filter. The nonlinear filter is capable of reducing the noise component in the signal while keeping only the periodic component of the speech signal. This feature enhances speech quality. The invention also extends to a novel method for processing a residual signal used to excite a linear prediction synthesis filter in order to attenuate wide band additive noise in the speech signal as constructed by the synthesis filter.
公开/授权文献
- US4789724A Preparation of anhydride copolymers 公开/授权日:1988-12-06