5th International Conference on Spoken Language Processing
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.
Bibliographic reference. Koishida, Kazuhito / Hirabayashi, Gou / Tokuda, Keiichi / Kobayashi, Takao (1998): "A 16 kbit/s wideband CELP coder using MEL-generalized cepstral analysis and its subjective evaluation", In ICSLP-1998, paper 0904.