ISCA Archive ICSLP 2000
ISCA Archive ICSLP 2000

An efficient codebook search algorithm for EVRC

Sung-Kyo Jung, Yong-Soo Choi, Young-Cheol Park, Dae-Hee Youn

In this paper, a fast implementation algorithm for EVRC encoder is presented. Among the routines of CELP-type speech coders, the fixed codebook search is the most computationally demanding. The fast algorithm developed in this study mainly concerns the fixed codebook search procedure. For efficient codebook search, two efficient schemes are developed: limiting the number of possible combination of pulse positions, and using a reduced-tap FIR filter instead of the impulse response of the weighted synthesis filter. The proposed EVRC algorithm was implemented using a fixed-point DSP, and the new EVRC algorithm was subjectively evaluated. It was found that the new FCB search routine could be implemented with only 24.3 % of the original one. Informal subjective tests confirmed that the speech quality of the proposed algorithm was indistinguishable from the original EVRC.


Cite as: Jung, S.-K., Choi, Y.-S., Park, Y.-C., Youn, D.-H. (2000) An efficient codebook search algorithm for EVRC. Proc. 6th International Conference on Spoken Language Processing (ICSLP 2000), vol. 1, 741-744

@inproceedings{jung00_icslp,
  author={Sung-Kyo Jung and Yong-Soo Choi and Young-Cheol Park and Dae-Hee Youn},
  title={{An efficient codebook search algorithm for EVRC}},
  year=2000,
  booktitle={Proc. 6th International Conference on Spoken Language Processing (ICSLP 2000)},
  pages={vol. 1, 741-744}
}