A pitch synchronous innovation celp (PSI-CELP) coder for 2-4 kbit/s

Satoshi Miki, Kazunori Mano, Takehiro Moriya, Kumiko Oguchi, Hitoshi Ohmuro

研究成果: Conference article査読

6 被引用数 (Scopus)

抄録

This paper proposes high-quality and low bit-rate (3.6 and 2.4 kbit/s) coders using a Pitch Synchronous Innovation CELP (PSI-CELP) method or a phase adaptive PSI-CELP. PSI-CELP, which is used as the excitation structure of the half-rate codec for the standard of Japanese digital mobile telephony, is based on CELP but adds pitch synchronous innovation, which means that even random codevectors are adaptively converted to have pitch periodicity for voiced frames. Phase adaptive PSI-CELP makes not only the periodicity, like in PSI-CELP, but, also the phase of random codevectors equal to those of an adaptive codevector. The subjective qualities of the 3.6- and 2 . 4 kbit/s coders exceed those of the 6.7-kbit/s VSELP coder, which is the full-rate codec for the standard of Japanese digital mobile telephony, and the 4.8-kbit/s U.S. Federal Standard 1016 CELP coder, respectively, in the error-free condition.

本文言語English
論文番号389705
ページ(範囲)II113-II116
ジャーナルICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
2
DOI
出版ステータスPublished - 1994
外部発表はい
イベントProceedings of the 1994 IEEE International Conference on Acoustics, Speech and Signal Processing. Part 2 (of 6) - Adelaide, Aust
継続期間: 1994 4 191994 4 22

ASJC Scopus subject areas

  • ソフトウェア
  • 信号処理
  • 電子工学および電気工学

引用スタイル