線形予測係数算出方法、及びその装置とそのプログラムと、その記憶媒体 - Nippon Telegraph and Telephone Corporation

Title:

線形予測係数算出方法、及びその装置とそのプログラムと、その記憶媒体

Document Type and Number:

Japanese Patent JP4746532

Kind Code:

B2

Abstract:

To provide a linear prediction coefficient calculation method and device, program thereof and its storage medium, capable of reducing a code amount when entropy coding is performed on a linear prediction error signal, by performing approximation of minimizing an absolute value of an amplitude of a prediction error di, instead of square error minimization.

An output signal of a frame division section for dividing a discrete time sequence digital signal into frames for each predetermined number of samples is received, and a prediction coefficient of all pole types is generated from a time sequence signal for each frame. An interim prediction coefficient generation section generates an interim prediction coefficient by calculating the linear prediction coefficient for each frame, and a prediction error signal based on the interim prediction coefficient is calculated and output as an interim prediction error signal. A prediction coefficient calculation section receives discrete time series digital signal and the interim prediction error signal for each frame and generates the linear prediction coefficient in which partial differential of the linear prediction coefficient of each order of a continuous function which can be differentiated and which approximates an absolute value of an amplitude of the prediction error signal, is all zero.

Inventors:

Takehiro Moriya
Noboru Harada
Yu Kamamoto

Application Number:

JP2006343319A

Publication Date:

August 10, 2011

Filing Date:

December 20, 2006

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

G10L19/00; G10L19/16

Domestic Patent References:

JP863192A
JP4918007B1
JP57158897A

Other References:

守谷健弘 TAKEHIRO MORIYA,MPEG-4 ALS-歪みを許さない「ロスレス・オーディオ符号化」の国際標準,NTT技術ジャーナル第18巻第6号,社団法人電気通信協会,2006年 6月 1日,p.42-45
亀岡弘和 Hirokazu KAMEOKA,予測誤差のGolomb-Rice符号量を最小化する線形予測分析 A Linear Predictive Coding Algorithm Minimizing the Golomb-Rice Code Length of the Residual Signal,電子情報通信学会論文誌 (J91-A) 第11号 THE IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS,COMMUNICATIONS AND COMPUTER SCIENCES (JAPANESE,日本,社団法人電子情報通信学会 THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS,2008年11月 1日,p.1017-1025
赤松茂,ディジタル信号処理ハンドブック Digital Signal Processing Handbook,株式会社オーム社,1993年 1月31日,p.160-161
谷萩隆嗣 Takashi Yahagi,音声と画像のディジタル信号処理初版 Digital Signal Processing of Speech and Images,株式会社コロナ社 CORONA PUBLISHING CO.,LTD.,1996年 9月30日,p.17-23

Attorney, Agent or Firm:

Naoki Nakao
Taku Kusano
Yukio Nakamura

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