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Title:
音声符号化装置および音声符号化方法
Document Type and Number:
Japanese Patent JP5388849
Kind Code:
B2
Abstract:
An audio encoding device which can improve encoding performance while performing division search on an algebraic codebook in an audio encoding. In a distortion minimizing unit (112) of a CELP encoding device: a maximum correlation value calculation unit (221) calculates a correlation value by using each pulse and a target signal in each candidate position for four pulses constituting the fixed codebook so as to acquire a maximum value of the correlation value for each pulse and calculates a maximum correlation value by using the maximum value of the correlation value; a sorting unit (222) divides the four pulses into two subsets each having two pulses; and a search unit (224) performs a division search on the fixed codebook and acquires a code indicating the positions and polarities of the four pulses where the encoding distortion is minimum.

Inventors:
Toshiyuki Morii
Application Number:
JP2009525276A
Publication Date:
January 15, 2014
Filing Date:
July 25, 2008
Export Citation:
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Assignee:
Panasonic Corporation
International Classes:
G10L19/107; G10L19/08
Domestic Patent References:
JP2004102186A2004-04-02
JP2002366199A2002-12-20
JPH096396A1997-01-10
JPH11259098A1999-09-24
JP2001228888A2001-08-24
JPH11501131A1999-01-26
JP2004102186A2004-04-02
JP2002366199A2002-12-20
JPH096396A1997-01-10
JPH11259098A1999-09-24
JP2001228888A2001-08-24
JPH11501131A1999-01-26
Attorney, Agent or Firm:
Koichi Washida



 
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