音響信号分析装置およびその方法、プログラム、記録媒体 - Nippon Telegraph and Telephone Corporation

Title:

音響信号分析装置およびその方法、プログラム、記録媒体

Document Type and Number:

Japanese Patent JP4486527

Kind Code:

B2

Abstract:

To analyze a sound signal by estimating parameters of an Exponential autoregressive model suitable to the sound signal.

Values ϕ^iand π^iof coefficients ϕiand πiof the Exponential autoregressive model given by least-squares error estimation are found from the initial value γ0of a scale parameter γ of the Exponential autoregressive model, the value γ^Aof the scale parameter γ is found from the values ϕ^iand π^iof the coefficients ϕiand πi, and new values ϕ^iand π^iof coefficients ϕiand πiare found from the value γ^Aof the scale parameter γ by least-squares error estimation. Further, the value γ^Bof a new scale parameter γ is found from the coefficients ϕ^iand π^i, and the value of the scale parameter when the difference between the γ^Aand γ^Bbecomes a designated value or lower and values of the coefficients ϕ^iand π^iimparting the value are regarded as parameter estimated values of the Exponential autoregressive model.

Inventors:

Kentaro Ishizuka
Hiroko Kato
Tomohiro Nakatani

Application Number:

JP2005063162A

Publication Date:

June 23, 2010

Filing Date:

March 07, 2005

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

G10L25/03; G10L25/27

Other References:

西口義朋 Yoshitomo NISHIGUCHI,座標変換を用いたテンソル積展開による高次スペクトルのパラメトリック推定 Parametric Estimation of Higher-Order Spectra by Tensor Product Expansion with Coordinate Transformation,電子情報通信学会論文誌 (J86-A) 第1号 THE TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS A,日本,社団法人電子情報通信学会 THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS,2003年 1月 1日,第J86-A巻

Attorney, Agent or Firm:

Naoki Nakao
Taku Kusano
Yukio Nakamura
Minoru Inagaki

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