Basic algorithm of conjugate-structure algebraic CELP (CS-ACELP) speech coder

Akitoshi Kataoka, Shinji Hayashi, Takehiro Moriya, Sachiko Kurihara, Kazunori Mano

Research output: Contribution to journalArticle


After lengthy discussion of standardization of an 8kbit/s speech coding algorithm that will be used for the Future Public Land Mobile Telecommunication Systems (FPLMTS), the ITU-T approved the speech coder CS-ACELP (Conjugate-Structure Algebraic CELP) in the November 1995 meeting. This paper overviews of CS-ACELP and discusses the algebraic codebook, perceptual weighting, and quantization methods for LSP parameters and gain. It also presents the results of subjective quality tests.

Original languageEnglish
Pages (from-to)325-329
Number of pages5
JournalNTT R and D
Issue number4
Publication statusPublished - 1996 Dec 1


ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Kataoka, A., Hayashi, S., Moriya, T., Kurihara, S., & Mano, K. (1996). Basic algorithm of conjugate-structure algebraic CELP (CS-ACELP) speech coder. NTT R and D, 45(4), 325-329.