Dual-pulse CS-CELP: a toll-quality low-complexity speech coder at 7.8 kbit/s

Hitoshi Ohmuro, Jotaro Ikedo, Takehiro Moriya, Akitoshi Kataoka, Shinji Hayashi, Kazunori Mano

研究成果: Conference article査読

3 被引用数 (Scopus)


Low-cost highly-efficient speech coding is important for personal multimedia communications. In this paper we propose a new low-complexity speech coding method called 'Dual-Pulse CS-CELP (DP-CS-CELP)' at 7.8 kbit/s. This method is based on ITU-T G.729. To reduce the complexity, we applied a new excitation model to the random code vectors and simplified the LPC coding, adaptive codebook search, perceptual weighting, and the other structures. The number of operations for this encoder is 3.80 MOPS, which achieves real-time speech coding and decoding on personal computers. Although the efficiency of this coder is a little lower than that of G.729, the MOS listening test showed that the subjective quality was equivalent to or a little better than that of G.726 (32-kbit/s ADPCM).

ジャーナルICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
出版ステータスPublished - 1996 1月 1
イベントProceedings of the 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP. Part 1 (of 6) - Atlanta, GA, USA
継続期間: 1996 5月 71996 5月 10

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


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