We have proposed a wideband CELP coder, called MGC-CELP, which provides high quality speech by utilizing mel-generalized cepstral (MGC) analysis instead of linear prediction (LP). In this paper, we investigate the performance of the wideband MGC-CELP coder at 16 kbit/s in terms of short-term predictor order, i.e., order of MGC analysis. Subjective tests show that the MGC-CELP coder with a predictor of order 20 gives better performance than ITU-T G.722 at 64 kbit/s. It is also found that the MGC-CELP coder with 12th order achieves comparable quality to the 64 kbit/s G.722, and outperforms the 16 kbit/s conventional CELP coder using 20th-order LP analysis under the same conditions.
Cite as: Koishida, K., Hirabayashi, G., Tokuda, K., Kobayashi, T. (1998) A 16 kbit/s wideband CELP coder using MEL-generalized cepstral analysis and its subjective evaluation. Proc. 5th International Conference on Spoken Language Processing (ICSLP 1998), paper 0904, doi: 10.21437/ICSLP.1998-389
@inproceedings{koishida98_icslp,
author={Kazuhito Koishida and Gou Hirabayashi and Keiichi Tokuda and Takao Kobayashi},
title={{A 16 kbit/s wideband CELP coder using MEL-generalized cepstral analysis and its subjective evaluation}},
year=1998,
booktitle={Proc. 5th International Conference on Spoken Language Processing (ICSLP 1998)},
pages={paper 0904},
doi={10.21437/ICSLP.1998-389}
}