Title :
Modified multiband excitation model at 2400 bps
Author :
Jamrozik, Michele ; Gowdy, John
Author_Institution :
Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA
Abstract :
This paper presents the modified multiband excitation model used for speech coding. In many MBE model coders, speech quality is degraded when incorrect voicing decisions are made, particularly for high-pitched female speakers. The MMBE addresses this issue with a modified voiced/unvoiced decision algorithm and a more robust pitch estimate. The listening quality of speech produced using the MMBE model is superior to the FS-1016 CELP coder and is at least comparable with the new 2400 bps MELP coder chosen as the new 2400 bps Federal Standard
Keywords :
linear predictive coding; parameter estimation; spectral analysis; speech coding; speech processing; vocoders; 2.4 kbit/s; FS-1016 CELP coder; MELP coder; high-pitched female speakers; listening speech quality; modified multiband excitation model; modified voiced/unvoiced decision algorithm; robust pitch estimate; speech coding; speech quality; Bit rate; Code standards; Degradation; Nonlinear filters; Robustness; Signal synthesis; Speech analysis; Speech coding; Speech synthesis; Vocoders;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.596260
