A linear-prediction-analysis device, a method, a program, and a recording medium - Nippon Telegraph and Telephone Corporation

Title:

A linear-prediction-analysis device, a method, a program, and a recording medium

Document Type and Number:

Japanese Patent JP6117359

Kind Code:

B2

Abstract:

An autocorrelation calculation unit 21 calculates an autocorrelation R O (i) from an input signal. A prediction coefficient calculation unit 23 performs linear prediction analysis by using a modified autocorrelation R' O (i) obtained by multiplying a coefficient w O (i) by the autocorrelation R O (i). It is assumed here, for each order i of some orders i at least, that the coefficient w O (i) corresponding to the order i is in a monotonically increasing relationship with an increase in a value that is negatively correlated with a fundamental frequency of the input signal of the current frame or a past frame.

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Inventors:

Yu Kamamoto
Takehiro Moriya
Noboru Harada

Application Number:

JP2015527315A

Publication Date:

April 19, 2017

Filing Date:

July 16, 2014

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

G10L25/12; A61B5/0452; A61B5/0476; A61B5/05; G10L19/06

Domestic Patent References:

JP2010170124A

Foreign References:

WO2012046685A1

Other References:

Redwan Salami et al.,Design and Description of CS-ACELP: A Toll Wuality 8kb/s Speech Coder,IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSIONG,1998年 3月,Vol. 6, No. 2,pp. 116-130
東倉洋一, 板倉文忠,PARCOR帯域圧縮における音声品質向上,電子情報通信学会論文誌 A,1978年 3月25日,Vol. J61-A, No. 3,pp. 254-261

Attorney, Agent or Firm:

Naoki Nakao
Yukio Nakamura
Yoshimura Munehiro

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