Adaptive post-filtering controlled by pitch frequency for CELP-based speech coder

Hironobu Chiba, Yutaka Kamamoto, Takehiro Moriya, Noboru Harada, Shigeki Miyabe, Takeshi Yamada, Shoji Makino

研究成果

抄録

Most speech codecs utilize a post-filter that emphasizes pitch structures to enhance perceptual quality at the decoder. Particularly, the bass post-filter used in ITU-T G.718 performs an adaptive pitch enhancement technique for a lower fixed frequency band. This paper describes a new post-filtering method in which the bass the frequency band and the gain are adaptively controlled frame-by-frame depending on the pitch frequency of decoded signal to improve bass post-filter performance. We have confirmed the improvement of the speech quality with the developed method through objective and subjective evaluations.

本文言語English
ホスト出版物のタイトルConference Record of the 48th Asilomar Conference on Signals, Systems and Computers
編集者Michael B. Matthews
出版社IEEE Computer Society
ページ838-842
ページ数5
ISBN(電子版)9781479982974
DOI
出版ステータスPublished - 2015 4 24
外部発表はい
イベント48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015 - Pacific Grove, United States
継続期間: 2014 11 22014 11 5

出版物シリーズ

名前Conference Record - Asilomar Conference on Signals, Systems and Computers
2015-April
ISSN(印刷版)1058-6393

Conference

Conference48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015
国/地域United States
CityPacific Grove
Period14/11/214/11/5

ASJC Scopus subject areas

  • 信号処理
  • コンピュータ ネットワークおよび通信

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