Title:
APPARATUS AND METHOD FOR EVALUATING VOICE SIGNAL QUALITY
Document Type and Number:
Japanese Patent JP3868278
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for evaluating voice signal quality which can carry out the quality evaluation of a voice signal including a delay fluctuation caused by a voice telephone call, and to provide a method for the same.
SOLUTION: The apparatus is provided with at least a frame generating means which generates a frame to the voice signal to be evaluated which includes the delay fluctuation, a delay correction means to correct the delay fluctuation of the voice signal to be evaluated for each frame on the basis of the amount of phase adjustments in which a correlation value between the voice signal with a voiced sound for each frame and a reference voice signal becomes maximum, a first quality evaluation means which determines the first evaluation value of a phase-corrected voice signal to be evaluated on the basis of the phase-corrected voice signal connecting the voice signals in which the delay fluctuation is corrected for each frame and the reference voice signal, and a second quality evaluation means which determines the second evaluation value of the voice signal to be evaluated on the basis of the amount of phase adjustments of the voice signal corrected by the delay correction means and the first evaluation value determined by an objective quality evaluation means.
Inventors:
Akie Ichiyoshi
Hiromi Aoyagi
Hiromi Aoyagi
Application Number:
JP2001365512A
Publication Date:
January 17, 2007
Filing Date:
November 30, 2001
Export Citation:
Assignee:
Oki Electric Industry Co., Ltd.
International Classes:
G10L25/51; G10L25/69; (IPC1-7): G10L11/00
Domestic Patent References:
| JP2000505269A | ||||
| JP2237244A | ||||
| JP2003500701A |
Foreign References:
| WO2000072306A1 |
Other References:
VoIP品質上の諸問題,電子情報通信学会技術研究報告 Vol.100 No.455,2000年11月14日
Attorney, Agent or Firm:
Nobuyuki Kudo