Title:
符号化方法、復号方法、符号化装置、復号装置、プログラム、記録媒体
Document Type and Number:
Japanese Patent JP5694751
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for improving, with a small calculation volume, quality of an audio signal produced by coding in a low bit.SOLUTION: A method includes: rearranging samples included in a sample sequence of a frequency region resulting from an audio signal in coding processing, for example, making, as the arranged sample sequence, a result of arranging at least a part of samples included in a sample sequence in a descending or ascending order of absolute values of values corresponding to the samples of a power spectrum envelope coefficient string based on a linear prediction coefficient of the audio signal; coding the sample sequence obtained by the arrangement; in decoding processing, obtaining a sample sequence of a frequency region by decoding an input code sequence; and obtaining the original sample sequence from the obtained sample sequence in accordance with a magnitude relationship of the power spectrum envelope coefficient string.
Inventors:
Takehiro Moriya
Noboru Harada
日和▲崎▼ 祐介
Yu Kamamoto
Noboru Harada
日和▲崎▼ 祐介
Yu Kamamoto
Application Number:
JP2010277180A
Publication Date:
April 01, 2015
Filing Date:
December 13, 2010
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G10L19/032; G10L19/02
Domestic Patent References:
| JP9106299A | ||||
| JP10276095A |
Foreign References:
| WO2012046685A1 |
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano
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