Title:
VOICE ENCODING DEVICE AND VOICE ENCODING METHOD
Document Type and Number:
WIPO Patent Application WO/2001/026094
Kind Code:
A1
Abstract:
A noise section detection unit (101) separates an input signal into a voice section and other sections to detect a signal in sections other than the voice section as a background noise. A noise level estimation unit (102) estimates a noise level in a noise section. An information source model storing unit (103) stores an information source model obtained by modeling a parameter string for a noise-free voice input signal. A voice analysis unit (104) analyzes an input signal and extracts a parameter. A parameter quantizing unit (105) quantizes the parameter extracted by the voice analysis unit (104) based on the information source model and the noise level, and outputs a code corresponding to the quantized value. Whereby, a voice encoding process can be implement that is least dependent on a noise model accuracy and resistant to a noise signal component, and maintains a high quality even under a background noise environment.
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Inventors:
YONEZAKI TADASHI (JP)
Application Number:
PCT/JP2000/006689
Publication Date:
April 12, 2001
Filing Date:
September 28, 2000
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YONEZAKI TADASHI (JP)
YONEZAKI TADASHI (JP)
International Classes:
G10L19/00; G10L19/16; G10L21/0208; H03M7/30; H04B14/04; (IPC1-7): G10L19/00
Foreign References:
| JPH08328598A | 1996-12-13 | |||
| JPH10307598A | 1998-11-17 |
Attorney, Agent or Firm:
Washida, Kimihito (Shintoshicenter Bldg. 24-1 Tsurumaki 1-chome Tama-shi, Tokyo, JP)
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