Title:
音声信号の雑音低減方法
Document Type and Number:
Japanese Patent JP3591068
Kind Code:
B2
Abstract:
A method for reducing noise in a speech signal is provided for restraining suppression of a predetermined band when an input speech signal has a large pitch strength. The noise reduction method is executed by the apparatus having a signal characteristic calculating unit, an adj calculating unit 32, a CE and NR value calculating unit, a Hn value calculating unit, and a spectrum correcting unit as main components. The signal characteristic calculating unit derives a pitch strength of the input speech signal. The adj calculating unit derives an adj value according to the pitch strength. The CE and NR value calculating unit derives an NR value according to the pitch strength. Then, the Hn value calculating unit derives the Hn value according to the NR value and set a noise suppression rate of the input speech signal. The spectrum correcting unit 10 reduces the noise of the input speech signal based on the noise suppression rate.
Inventors:
Chan Joseph
Masayuki Nishiguchi
Masayuki Nishiguchi
Application Number:
JP18796695A
Publication Date:
November 17, 2004
Filing Date:
June 30, 1995
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G06F15/18; G06N3/00; G10L15/02; G10L15/08; G10L15/20; G10L21/02; G10L25/90; H03H17/02; H03H21/00; (IPC1-7): G10L15/20; G10L15/02; G10L21/02
Domestic Patent References:
| JP6289897A | ||||
| JP6027994A | ||||
| JP6202695A | ||||
| JP6331496A | ||||
| JP4271399A | ||||
| JP7054436B2 | ||||
| JP6295196A |
Attorney, Agent or Firm:
Akira Koike
Eiichi Tamura
Seiji Iga
Eiichi Tamura
Seiji Iga