Title:
音声符号化方法および装置
Document Type and Number:
Japanese Patent JP3552201
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a voice coder in which coding distortion is made less noticeable even at a low bit rate. SOLUTION: By windowing first autocorrelation coefficients, that are computed in an autocorrelation computing section 101 from inputted voice signals, using a different shaped autocorrelation window in first and second windowing sections 102 and 103, corrected second and third autocorrelation coefficients are obtained. Using the second autocorrelation coefficients, spectrum parameters, that are to be coded in a coding section 106, are computed in a coding spectrum parameter computing section 104. Moreover, a hearing weighted spectrum parameter computing section 105 computes the spectrum parameters for hearing weighted characteristic setting using the third autocorrelation coefficients. Based on the parameters, a hearing weight setting section 107 sets the hearing weighted characteristic for the coding of residual components conducted by a coding section 108.
Inventors:
Kimio Miseki
Masahiro Oshikiri
Masahiro Oshikiri
Application Number:
JP18511499A
Publication Date:
August 11, 2004
Filing Date:
June 30, 1999
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G10L19/00; G10L19/04; G10L19/06; G10L19/12; H03M7/30; H04B14/04; (IPC1-7): G10L19/06; G10L19/00; G10L19/04; G10L19/12; H03M7/30
Domestic Patent References:
| JP10143198A | ||||
| JP9230896A | ||||
| JP2002341889A |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai