A wideband CELP speech coder at 16 kbit/s based on mel-generalized cepstral analysis

K. Koishida, G. Hirabayashi, K. Tokuda, T. Kobayashi
Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181)  
This paper proposes a wideband CELP coder using frequency warping. Instead of linear prediction, the proposed coder adopts the melgeneralized cepstral analysis, and encodes fullband of the speech signal through a warped frequency scale. It is shown that the subjective quality of the proposed coder at 16 kbit/s is better than that of the ITU-T G.722 at 64 kbit/s. Furthermore, the proposed coder gives a much smaller difference in performance for male and female speakers than the conventional CELP
more » ... coder. These results indicate that the frequency warping makes a large contribution to the improvement of the subjective quality for wideband speech coding.
doi:10.1109/icassp.1998.674392 dblp:conf/icassp/KoishidaHTK98 fatcat:nujgokvow5emhgkqvov3g3jlxa