Title:
サブサンプルされた励起波形コードブック
Document Type and Number:
Japanese Patent JP2006510063
Kind Code:
A
Abstract:
Methods and apparatus are presented for reducing the number of bits needed to represent an excitation waveform. An acoustic signal in an analysis frame is analyzed to determine whether it is a band-limited signal. A sub-sampled sparse codebook is used to generate the excitation waveform if the acoustic signal is a band-limited signal. The sub-sampled sparse codebook is generated by decimating permissible pulse locations from the codebook track in accordance with the frequency characteristic of the acoustic signal.
Inventors:
Kandadai, Ananza Padmanabhan A
Manjunas, Sharas
Elle-Murray, Caledo
Manjunas, Sharas
Elle-Murray, Caledo
Application Number:
JP2004562266A
Publication Date:
March 23, 2006
Filing Date:
December 17, 2003
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
G10L19/08; G10L19/06; G10L19/12; G10L19/14; G10L19/00
Domestic Patent References:
| JP2000235399A | 2000-08-29 | |||
| JPH0561499A | 1993-03-12 | |||
| JPH10312198A | 1998-11-24 |
Foreign References:
| WO2001020595A1 | 2001-03-22 | |||
| WO2002047068A2 | 2002-06-13 |
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto