ISCA Archive Interspeech 2008
ISCA Archive Interspeech 2008

A new fast algebraic fixed codebook search algorithm in CELP speech coding

Vaclav Eksler, Redwan Salami, Milan Jelinek

This paper introduces a very fast search algorithm of algebraic fixed codebook in CELP-based speech codecs. The proposed method searches codebook pulses sequentially, and recomputes the fixed codebook gain, the so-called backward filtered target vector, and a certain reference signal after each new pulse is determined. This results in a significant complexity reduction compared to existing methods while preserving the same speech quality. The presented algorithm is used in the new embedded speech and audio codec (G.EV-VBR) being currently standardized by the ITU-T.


doi: 10.21437/Interspeech.2008-9

Cite as: Eksler, V., Salami, R., Jelinek, M. (2008) A new fast algebraic fixed codebook search algorithm in CELP speech coding. Proc. Interspeech 2008, 45-48, doi: 10.21437/Interspeech.2008-9

@inproceedings{eksler08_interspeech,
  author={Vaclav Eksler and Redwan Salami and Milan Jelinek},
  title={{A new fast algebraic fixed codebook search algorithm in CELP speech coding}},
  year=2008,
  booktitle={Proc. Interspeech 2008},
  pages={45--48},
  doi={10.21437/Interspeech.2008-9}
}