发明名称 |
Apparatus and method for creating pitch wave signals and apparatus and method compressing, expanding and synthesizing speech signals using these pitch wave signals |
摘要 |
A pitch wave signal creation method as a preliminary process for efficiently coding a speech wave signal having a fluctuated pitch period is provided. A speech signal compressing/expanding apparatus and a speech signal synthesizing apparatus using the method, and a signal processing associated therewith are further provided. The pitch wave creation method of the invention is essentially comprised of a method of detecting the instantaneous pitch period of each pitch wave element of the speech wave signal, and a process of converting a corresponding pitch wave element into a normalized pitch wave element having a predetermined fixed time length by expanding and compressing the pitch wave element on a time axis while retaining its wave pattern based on the each detected instantaneous pitch period. The speech signal having a pitch fluctuation can be compressed in high quality and high efficiency by coding or synthesizing the speech wave signal using the pitch wave signal creation method of the invention.
|
申请公布号 |
US2007174056(A1) |
申请公布日期 |
2007.07.26 |
申请号 |
US20070715937 |
申请日期 |
2007.03.09 |
申请人 |
KABUSHIKI KAISHA KENWOOD |
发明人 |
SATO YASUSHI |
分类号 |
G10L13/08;G10L11/04;G10L19/09;G10L19/14;G10L21/003;G10L21/013;G10L21/04 |
主分类号 |
G10L13/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|